tzutalin/dlib-android

:dragon: Port dlib to Android

dlib-android's Issues

Landmark detection working in android?

Hi, I am wondering if the facial landmark detection example from dlib works in Android?

Thank you.

Can it works with Camera API

Hi There,

I am using Camera API (Old Camera API). Using this old api i am getting yuv raw image data and i am converting that data into the ARGB format and when i pass this bitmap to dlib library it says no face found.

Can anyone help me in which format i need to pass the data means ARGB is fine or any other image convertions i need to do?.

Export facial landmarks

It's possible to export the coordinates of the facial landmarks on a file? Thanks.

看了说明还是不懂

有更具体的说明吗？
以前没有做过Android. 现在出了CMake。

UnsatisfiedLinkError while loading library

Successfully built and replaced all .SO files on jniLibs folder.
Android.mk and Application.mk without changes.

Testing on Dlib Andorid App: Without any gradle version or library updates.

Samsung Galaxy S4 (I9500) API22: Library Loaded with Success.
LG Nexus 5 API 23: UnsatisfiedLinkError

E/dlib: library not found.
W/System.err: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "__aeabi_memcpy"
W/System.err:     at java.lang.Runtime.loadLibrary(Runtime.java:372)
W/System.err:     at java.lang.System.loadLibrary(System.java:1076)
W/System.err:     at com.tzutalin.dlib.FaceDet.<clinit>(FaceDet.java:29)

Also tested compiling with different NDK versions: r14b and r13b. Still crashes.
Thanks.

Can you please make an iOS version of dlib?

Getting some errors when trying to build

Hi, I'm following your instructions, but when I build I get:

ABI:armeabi-v7a
Traceback (most recent call last):
  File "build_push.py", line 104, in <module>
    build(args.jobs)
  File "build_push.py", line 37, in build
    subprocess.call(['ndk-build', '-j', str(jobs)])
  File "/usr/lib/python2.7/subprocess.py", line 522, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

It happens also when building it for another project, and not only to test.

Question: which version of opencv to put in third-party folder?

I've tried to build it with ndk-build but it says it can't find opencv in third-party. I've tried C++ and android versions but none of them works.

Unable to import JNI code ImageUtils

Heya,

I am making an Android app, with similar functionality as the demo app in terms of dlib calls. I started from a new project, using the Gradle dependency. Everything works fine including JNI calls to DetFace etc. but I also want to use the JNI functions of the ImageUtils class and am not sure how I can include these? Every time I run them, I get an Implementation not found error. It seems the binaries are not inside the libpeople_det.so, right? Where are they then? I would expect to see a .so file somewhere, and a System.loadLibrary in ImageUtils, but I do not find either of them. Could anyone help me out? Thanks a lot.

Question: Is there any way that JNI take bitmap or byte array of the bitmap and convert to dlib::array2d without openCV?

Hi,
Is there any way that JNI take a bitmap or the byte array of the bitmap and convert it to dlib::array2d without openCV?

Unsatisfied link error

The default "libpeople_det.so" included in the repo works. But when I build it locally on my machine I end up with UnsatisfiedLinkError.

OS: mac OS sierra
ndk version: android-ndk-r12b

10-21 17:28:33.561 25557-25679/com.tzutalin.dlibtest E/art: No implementation found for void com.tzutalin.dlibtest.ImageUtils.convertYUV420ToARGB8888(byte[], byte[], byte[], int[], int, int, int, int, int, boolean) (tried Java_com_tzutalin_dlibtest_ImageUtils_convertYUV420ToARGB8888 and Java_com_tzutalin_dlibtest_ImageUtils_convertYUV420ToARGB8888___3B_3B_3B_3IIIIIIZ)
10-21 17:28:33.571 25557-25679/com.tzutalin.dlibtest E/AndroidRuntime: FATAL EXCEPTION: ImageListener
                                                                       Process: com.tzutalin.dlibtest, PID: 25557
                                                                       java.lang.UnsatisfiedLinkError: No implementation found for void com.tzutalin.dlibtest.ImageUtils.convertYUV420ToARGB8888(byte[], byte[], byte[], int[], int, int, int, int, int, boolean) (tried Java_com_tzutalin_dlibtest_ImageUtils_convertYUV420ToARGB8888 and Java_com_tzutalin_dlibtest_ImageUtils_convertYUV420ToARGB8888___3B_3B_3B_3IIIIIIZ)
                                                                           at com.tzutalin.dlibtest.ImageUtils.convertYUV420ToARGB8888(Native Method)
                                                                           at com.tzutalin.dlibtest.OnGetImageListener.onImageAvailable(OnGetImageListener.java:193)
                                                                           at android.media.ImageReader$ListenerHandler.handleMessage(ImageReader.java:648)
                                                                           at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                           at android.os.Looper.loop(Looper.java:148)
                                                                           at android.os.HandlerThread.run(HandlerThread.java:61)

Another log:

10-21 18:33:59.178 20989-21373/com.tzutalin.dlibtest E/art: No implementation found for int com.tzutalin.dlib.PeopleDet.jniOpencvHOGDetect(java.lang.String) (tried Java_com_tzutalin_dlib_PeopleDet_jniOpencvHOGDetect and Java_com_tzutalin_dlib_PeopleDet_jniOpencvHOGDetect__Ljava_lang_String_2)
10-21 18:33:59.183 20989-21373/com.tzutalin.dlibtest E/AndroidRuntime: FATAL EXCEPTION: pool-1-thread-1
                                                                       Process: com.tzutalin.dlibtest, PID: 20989
                                                                       java.lang.UnsatisfiedLinkError: No implementation found for int com.tzutalin.dlib.PeopleDet.jniOpencvHOGDetect(java.lang.String) (tried Java_com_tzutalin_dlib_PeopleDet_jniOpencvHOGDetect and Java_com_tzutalin_dlib_PeopleDet_jniOpencvHOGDetect__Ljava_lang_String_2)
                                                                           at com.tzutalin.dlib.PeopleDet.jniOpencvHOGDetect(Native Method)
                                                                           at com.tzutalin.dlib.PeopleDet.detPerson(PeopleDet.java:56)
                                                                           at com.tzutalin.dlibtest.MainActivity.runDetectAsync(MainActivity.java:236)
                                                                           at com.tzutalin.dlibtest.MainActivity_.access$301(MainActivity_.java:32)
                                                                           at com.tzutalin.dlibtest.MainActivity_$6.execute(MainActivity_.java:156)
                                                                           at org.androidannotations.api.BackgroundExecutor$Task.run(BackgroundExecutor.java:405)
                                                                           at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
                                                                           at java.util.concurrent.FutureTask.run(FutureTask.java:237)
                                                                           at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
                                                                           at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                                                           at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                                                           at java.lang.Thread.run(Thread.java:818)

Steps to reproduce:

• git clone --recursive https://github.com/tzutalin/dlib-android.git
• cd dlib-android
• ./envsetup
• ndk-build -j 2
• cp -r libs/* dlib-android-app/dlib/src/main/jniLibs
• Build apk. Fire camera on the phone.

Any pointers on where I should look next? ( I haven't changed anything in the repo. Just ran an ndk-build after cloning the repo.)

Using Test files

Hi,
I have successfully compile dlib library in windows 7. Now how can I use "TestSelectiveSearch" and "face_landmark_detection_ex" files in android which are in "Tests" folder and build with other files in "android-dlib" static library.
Thanks and regards
Nadeem Asif

Possible typo

Hi, I'm trying (with no luck until now) to build jnilib_ex, I think there's a typo in https://github.com/tzutalin/dlib-android/blob/master/jni/Android.mk#L7, shouldn't it be LOCAL_C_INCLUDES?

face detection using OpenMP

any plan to optimize the speed of scan_fhog_pyrimaid using OpenMP like https://github.com/TadasBaltrusaitis/CLM-framework/blob/master/lib/3rdParty/dlib/include/dlib/image_processing/scan_fhog_pyramid.h

App crashes when I manually compiled dlib-android, copy .so files

Hi, I'm using your app for checking face detection time.
I'm revising dlib library code, compile it manually ndk-build -j2.

when I compiled it, and cp -r libs/* ~~jniLibs/
successfully builded, but when I turn on the cam, it crashes.

how did you compile with your example(dlib-android-app) .so file?
can you give any hints?

thank you for your contribution. :)

Query for faster live camera face recognition and landmarking?

I need to get faster camera preview with face landmarks, it normally take 200 ms to perform the operation on each video frame, can anything should be done for faster face landmarking.

thank you

How to enable libpng support?

How to enable libpng support, I am getting runtime exception:

You must #define DLIB_PNG_SUPPORT and link to libpng to read PNG files.
Do this by following the instructions at http://dlib.net/compile.html.
Note that you must cause DLIB_PNG_SUPPORT to be defined for your entire project.
So don't #define it in one file. Instead, use a compiler switch like -DDLIB_PNG_SUPPORT
so it takes effect for your entire application." failed

test failed

did all as described

but face landmark failed like below in "python build_push.py --test "

Test face landmark
3969 KB/s (327422 bytes in 0.080s)
6394 KB/s (99693937 bytes in 15.225s)
5796 KB/s (1492988 bytes in 0.251s)
----Execute /data/local/tmp/face_lanmark

exception thrown!
error occurred in compress_stream_kernel_1::decompress

do I miss something? how can I fix it ?

demo failed, please help

In my demo project, invoke get_frontal_face_detector(); , when run, i will get the following error:

   terminate called after throwing an instance of 'std::ios_base::failure'
     what():  error occurred in compress_stream_kernel_1::decompress

I've checked the source code, in dlib/compress_stream/compress_stream_kernel_1.h,

if (out.sputc(static_cast<char>(symbol)) != static_cast<int>(symbol))
{ 
   throw std::ios::failure("error occurred in compress_stream_kernel_1::decompress"); 
}

I don't know the purpose of this code : out.sputc(static_cast(symbol)), sputc should change char to int, but when symbol equal or greater than 128, sputc will get a negtive signed char value. Then the demo running failed. The cross compiler is: arm-linux-gnueabi-gcc-4.7.1

But everything works fine in Ubuntu 14.04 x64, GCC 4.8.

How to fix it?

When can Facial Landmark be available?

Hello,i notice that you add facial landmark into your project and it is not finished.I wonder that when can facial landmark available?

dlib-android ndk build on Windows

Thanks for your contribution.

dlib-android crashes when built locally

I am currently trying to use dlib-android (rev d6e48c1) after building it via the default build command:
python build_push.py --android_project ../dlib-android-app/dlib/src/main/jniLibs/

(dlib-android-app is dlib-android-app at d6e48c1)

When not building dlib-android manually, the app behaves as expected. However, the app behaves as following after performing a (successful) build as shown above:

1. Start app
2. Click "Live preview" from bottom left.
3. CameraActivity is started:
   • Title view remains empty; neither Copying landmark model nor time cost messages is shown
   • Floating video frame view with landmarks does not appear.
   • Application crashes after ~9sec.

Do you have any idea what could be the difference between your original build and my local one?
The original dlib board has an (unresolved) thread regarding this issue that relates to Android and possibly to dlib-android: https://sourceforge.net/p/dclib/discussion/442518/thread/b3ef5401/

Thanks a lot!

Crash log
Full log: 20160713_dlib-android_crash.txt

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'samsung/trltexx/trlte:5.1.1/LMY47X/N910FXXS1COK2:user/release-keys'
Revision: '12'
ABI: 'arm'
pid: 4292, tid: 4747, name: InferenceThread  >>> com.tzutalin.dlibtest <<<
signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
    r0 00000000  r1 0000128b  r2 00000006  r3 00000000
    r4 9c87bdb8  r5 00000006  r6 00000016  r7 0000010c
    r8 b4b4bb00  r9 a0349d30  sl 12c033d0  fp 9c878bb0
    ip 0000128b  sp 9c8789f0  lr b6e0771d  pc b6e2a2dc  cpsr 600f0010
backtrace:
    #00 pc 000372dc  /system/lib/libc.so (tgkill+12)
    #01 pc 00014719  /system/lib/libc.so (pthread_kill+52)
    #02 pc 00015337  /system/lib/libc.so (raise+10)
    #03 pc 00011bd1  /system/lib/libc.so (__libc_android_abort+36)
    #04 pc 00010044  /system/lib/libc.so (abort+4)
    #05 pc 0046a103  /data/app/com.tzutalin.dlibtest-1/lib/arm/libpeople_det.so (__gnu_cxx::__verbose_terminate_handler()+226)
    #06 pc 00433dc9  /data/app/com.tzutalin.dlibtest-1/lib/arm/libpeople_det.so (__cxxabiv1::__terminate(void (*)())+4)
    #07 pc 00433e3d  /data/app/com.tzutalin.dlibtest-1/lib/arm/libpeople_det.so (std::terminate()+8)
    #08 pc 00433f61  /data/app/com.tzutalin.dlibtest-1/lib/arm/libpeople_det.so (__cxa_throw+120)
    #09 pc 00150a9c  /data/app/com.tzutalin.dlibtest-1/lib/arm/libpeople_det.so (dlib::compress_stream_kernel_1<dlib::entropy_encoder_model_kernel_5<257ul, dlib::entropy_encoder_kernel_2, 200000ul, 4ul>, dlib::entropy_decoder_model_kernel_5<257ul, dlib::entropy_decoder_kernel_2, 200000ul, 4ul>, dlib::crc32>::decompress(std::istream&, std::ostream&) const+544)
    #10 pc 00150478  /data/app/com.tzutalin.dlibtest-1/lib/arm/libpeople_det.so (dlib::get_serialized_frontal_faces()+63512)
    #11 pc 00140654  /data/app/com.tzutalin.dlibtest-1/lib/arm/libpeople_det.so (dlib::get_frontal_face_detector()+44)
    #12 pc 0013544c  /data/app/com.tzutalin.dlibtest-1/lib/arm/libpeople_det.so (DLibHOGFaceDetector::det(cv::Mat const&)+236)
    #13 pc 000e8d30  /data/app/com.tzutalin.dlibtest-1/lib/arm/libpeople_det.so (Java_com_tzutalin_dlib_PeopleDet_jniBitmapFaceDect+868)
    #14 pc 0013c77f  /data/dalvik-cache/arm/data@[email protected]@[email protected]

OS used for build

• OSX 10.11.4 - Darwin myhostname 15.4.0 Darwin Kernel Version 15.4.0: Fri Feb 26 22:08:05 PST 2016; root:xnu-3248.40.184~3/RELEASE_X86_64 x86_64
• or Linux debian 4.6.0-1-amd64 #1 SMP Debian 4.6.3-1 (2016-07-04) x86_64 GNU/Linux

Android device

• Samsung Galaxy Note 4(SM-N910F)
• Android 5.1.1
• armeabi-v7

Allow NV21 frames for face detection

Hi, It would be a very sweet implementation, if you add a new function that allows input frames for face and landmark detection, in NV21 Image Format, since that's the native image format of all Andorid Camera Preview. Or, maybe allow YUV_420_888 if you only want Camera2 compatibility.

My reason is that I have to read preview frames in NV21 (from Camera1) then convert it to Bitmap then downscale the Bitmap, and send bitmap to detector.
Read preview frames in YUV_420_888 (from Camera2) then convert to NV21, then convert to Bitmap then Downscale the Bitmap, and send bitmap to detector.

That process is not done inside NDK, and you may know it's slow. In order to get a "high FPS" face detection, I have to downscale a lot and almost none faces are detected.

Thanks!

cant find compute_face_descriptors

is there a way to execute compute_face_descriptors from https://github.com/davisking/dlib/blob/3e63e0a1b342c7b79e84aa2d1750587e39403922/tools/python/src/face_recognition.cpp

Without rebuilding

I found the class FaceDet default use dlib::frontal_face_detector . can I change other detector？

// The format of mat should be BGR or Gray
// If converting 4 channels to 3 channls because the format could be BGRA or
// ARGB
virtual inline int det(const cv::Mat& image) {
if (image.empty())
return 0;
LOG(INFO) << "com_tzutalin_dlib_PeopleDet go to det(mat)";
if (image.channels() == 1) {
cv::cvtColor(image, image, CV_GRAY2BGR);
}
CHECK(image.channels() == 3);
// TODO : Convert to gray image to speed up detection
// It's unnecessary to use color image for face/landmark detection
dlib::cv_imagedlib::bgr_pixel img(image);
mRets = mFaceDetector(img);
LOG(INFO) << "Dlib HOG face det size : " << mRets.size();
mFaceShapeMap.clear();
// Process shape
if (mRets.size() != 0 && mLandMarkModel.empty() == false) {
for (unsigned long j = 0; j < mRets.size(); ++j) {
dlib::full_object_detection shape = msp(img, mRets[j]);
LOG(INFO) << "face index:" << j
<< "number of parts: " << shape.num_parts();
mFaceShapeMap[j] = shape;
}
}
return mRets.size();
}

Error while Build.

Hi, I have got this error on executing following command
ndk build -j 2

TOP Level Path: /opt/dlib/dlib-android
/opt/dlib/dlib-android/third_party/miniglog/Android.mk:5: "Build miniglog.so/miniglog.a"
/opt/dlib/dlib-android/third_party/miniglog/Android.mk:8: /opt/dlib/dlib-android/third_party/miniglog
jni/jni_detections/Android.mk:8: /opt/dlib/dlib-android/third_party/opencv/jni/OpenCV.mk: No such file or directory
"Won't build test's executable file"
make: *** No rule to make target '/opt/dlib/dlib-android/third_party/opencv/jni/OpenCV.mk'.  Stop.
dp@dp-Lenovo-G480:/opt/dlib/dlib-android$ 

Export landmarks 2.0

Hi again,

I have this code to export the facial landmarks in an external file, but I don't know where I must put it. Initially, I put it in FaceDetTest.java. It compiles but doesn't work.

public void landmarkextract(ArrayList<Point> landmarks) throws IOException { String route = "/sdcard/landmarks.txt"; File lndmrk = new File(route); BufferedWriter bw = new BufferedWriter(new FileWriter(lndmrk)); for(int i=0; i<landmarks.size(); i++){ bw.write(String.valueOf(landmarks.get(i))+"\n"); } bw.close(); }

Thanks.

Edit: Solved! I put it on the MainActivity.

dlib compiling error round

I tried to compile it using NDK-build but received following error:

jni/../dlib\dlib/image_loader/../image_transforms/random_cropper.hjni/../dlib\dlib/image_loader/../image_transforms/random_cropper.h::178178::6767:: error: noerror : member nonamed member'round' namedin 'round'namespace
in 'std'namespace

              const unsigned long min_object_height_absolute = std::round(min_object_height*crop_plan.rows);'std'

                                                         ~~~~~^            const unsigned long min_object_height_absolute = std::round(min_object_height*crop_plan.rows);

                                                         ~~~~~^

Anyone know how can I fix it?

Add .shared objects(.so) to my own application

I add your pre-build .so file in my application project.
When I debugged my application, I got an error message:

A/native: F/jni_primitives.h:113 'detRetClass' Must be non NULL

Is there anything that I forget to add in my project?

The project structure setting:
|--app:
|--|--src:
|--|--|--main
|--|--|--|--jniLibs
|--|--|--|--|--arm64-v8a
|--|--|--|--|--|--.so Files
|--|--|--|--|--armeabi-v7a
|--|--|--|--|--|--.so Files
|--|--|--|--|--x86
|--|--|--|--|--|--.so Files
|--|--|--|--|--x86_64
|--|--|--|--|--|--.so Files

weird file

Hello!
I used both this repo and dlib-android-app.
I wonder, how can i change the path where the file shape_predictor_68_face_landmarks.dat
will be saved at?

An other question, i want to create a new project (app) that uses dlib parts, how can i do it?

thank you very much!

opencv not a zip file

When executing envsetup opencv it raises an error that "is not a zip file". Trying to decompress manually with 2 different tools gives me the same problem. (I'm on a mac, never had issues with zip files until this one)

Traceback (most recent call last):
  File "./envsetup", line 127, in <module>
    main(sys.argv[1:])
  File "./envsetup", line 124, in main
    sync_submodules()
  File "./envsetup", line 119, in sync_submodules
    prefix=prebuilt_path, out_prefix=prebuilt_opencv_out)
  File "./envsetup", line 97, in downloadPrebuiltOpencv
    unzipFile(OPENCV_ARCHIVE)
  File "./envsetup", line 22, in unzipFile
    zfile = zipfile.ZipFile(filename)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/zipfile.py", line 770, in __init__
    self._RealGetContents()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/zipfile.py", line 811, in _RealGetContents
    raise BadZipfile, "File is not a zip file"
zipfile.BadZipfile: File is not a zip file

How can I get a file that can be unzipped?

Compile Error for ndk build

Hi
I want to build dlib android library.
My operating system is windows 7.
I can build ndk library successfully.
I can build dlib on Ubuntu too.
But when I want to build it on windows 7. The result is as follows:

can any one help me to solve it.

Can't load people_det.so in the android app sample

The dlib android app example uses jniBitmapFaceDect, but I wanted to detect objects instead.
I added a new function (jniBitmapDLibHOGDect) to jni_people_det.cpp. I compiled it by following the instructions, and I got four people_det.so files. I copied them to the android app sample project, but now the library fails to load, throwing this error:

dlopen failed: cannot locate symbol "__aeabi_memcpy" referenced by "/data/app/com.tzutalin.dlibtest-1/lib/arm/libpeople_det.so"

Any ideas what this means, or how to resolve it?

Error when build [x86-64]

Hi man,
I have a problem when build dlib-android on Ubuntu, pls help. The error is as following:
Android NDK: [x86_64] Modules to build: TestSelectiveSearch face_landmark max_cost_assignment_ex people_det svm_ex svr_ex
rm -f ./libs/arm64-v8a/lib_.so ./libs/armeabi/lib_.so ./libs/armeabi-v7a/lib_.so ./libs/armeabi-v7a-hard/lib_.so ./libs/mips/lib_.so ./libs/mips64/lib_.so ./libs/x86/lib_.so ./libs/x86_64/lib_.so
[armeabi-v7a] Compile++ arm : TestSelectiveSearch <= TestSelectiveSearch.cpp
[armeabi-v7a] Compile++ arm : face_landmark <= threads_kernel_shared.cpp
/home/huynq/Android/android-ndk-r11c/toolchains/llvm/prebuilt/linux-x86/bin/clang++ -MMD -MP -MF ./obj/local/armeabi-v7a/objs-debug/TestSelectiveSearch/TestSelectiveSearch.o.d -gcc-toolchain /home/huynq/Android/android-ndk-r11c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86 -fpic -ffunction-sections -funwind-tables -fstack-protector-strong -Wno-invalid-command-line-argument -Wno-unused-command-line-argument -no-canonical-prefixes -fno-integrated-as -target armv7-none-linux-androideabi -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-exceptions -fno-rtti -O2 -g -DNDEBUG -fomit-frame-pointer -fstrict-aliasing -O0 -UNDEBUG -fno-omit-frame-pointer -fno-strict-aliasing -mfpu=neon -Ijni/other_daemon_ex/../../third_party/opencv/jni/include -Ijni/other_daemon_ex/../dlib -Ijni/other_daemon_ex/../dlib/all/source.cpp -I/home/huynq/Android/android-ndk-r11c/sources/cxx-stl/gnu-libstdc++/4.9/include -I/home/huynq/Android/android-ndk-r11c/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi-v7a/include -I/home/huynq/Android/android-ndk-r11c/sources/cxx-stl/gnu-libstdc++/4.9/include/backward -Ijni/other_daemon_ex -DANDROID -fPIC -DANDROID -fsigned-char -pie -fPIE -Wa,--noexecstack -Wformat -Werror=format-security -std=c++11 -frtti -fexceptions -std=c++11 -frtti -fexceptions -isystem /home/huynq/Android/android-ndk-r11c/platforms/android-8/arch-arm/usr/include -c jni/other_daemon_ex/TestSelectiveSearch.cpp -o ./obj/local/armeabi-v7a/objs-debug/TestSelectiveSearch/TestSelectiveSearch.o
make: /home/huynq/Android/android-ndk-r11c/toolchains/llvm/prebuilt/linux-x86/bin/clang++: Command not found
rm -f ./libs/arm64-v8a/gdbserver ./libs/armeabi/gdbserver ./libs/armeabi-v7a/gdbserver ./libs/armeabi-v7a-hard/gdbserver ./libs/mips/gdbserver ./libs/mips64/gdbserver ./libs/x86/gdbserver ./libs/x86_64/gdbserver
[armeabi-v7a] Compile++ arm : face_landmark <= entropy_decoder_kernel_2.cpp
/home/huynq/Android/android-ndk-r11c/toolchains/llvm/prebuilt/linux-x86/bin/clang++ -MMD -MP -MF ./obj/local/armeabi-v7a/objs-debug/face_landmark//dlib//dlib/threads/threads_kernel_shared.o.d -gcc-toolchain /home/huynq/Android/android-ndk-r11c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86 -fpic -ffunction-sections -funwind-tables -fstack-protector-strong -Wno-invalid-command-line-argument -Wno-unused-command-line-argument -no-canonical-prefixes -fno-integrated-as -target armv7-none-linux-androideabi -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-exceptions -fno-rtti -O2 -g -DNDEBUG -fomit-frame-pointer -fstrict-aliasing -O0 -UNDEBUG -fno-omit-frame-pointer -fno-strict-aliasing -mfpu=neon -Ijni/other_daemon_ex/../../third_party/opencv/jni/include -Ijni/other_daemon_ex/../dlib -I/home/huynq/Android/android-ndk-r11c/sources/cxx-stl/gnu-libstdc++/4.9/include -I/home/huynq/Android/android-ndk-r11c/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi-v7a/include -I/home/huynq/Android/android-ndk-r11c/sources/cxx-stl/gnu-libstdc++/4.9/include/backward -Ijni/other_daemon_ex -DANDROID -fPIC -DANDROID -fsigned-char -pie -fPIE -Wa,--noexecstack -Wformat -Werror=format-security -std=c++11 -frtti -fexceptions -std=c++11 -frtti -fexceptions -isystem /home/huynq/Android/android-ndk-r11c/platforms/android-8/arch-arm/usr/include -c jni/other_daemon_ex/../dlib//dlib/threads/threads_kernel_shared.cpp -o ./obj/local/armeabi-v7a/objs-debug/face_landmark//dlib//dlib/threads/threads_kernel_shared.o
make: /home/huynq/Android/android-ndk-r11c/toolchains/llvm/prebuilt/linux-x86/bin/clang++: Command not found
/home/huynq/Android/android-ndk-r11c/toolchains/llvm/prebuilt/linux-x86/bin/clang++ -MMD -MP -MF ./obj/local/armeabi-v7a/objs-debug/face_landmark//dlib/dlib/entropy_decoder/entropy_decoder_kernel_2.o.d -gcc-toolchain /home/huynq/Android/android-ndk-r11c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86 -fpic -ffunction-sections -funwind-tables -fstack-protector-strong -Wno-invalid-command-line-argument -Wno-unused-command-line-argument -no-canonical-prefixes -fno-integrated-as -target armv7-none-linux-androideabi -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-exceptions -fno-rtti -O2 -g -DNDEBUG -fomit-frame-pointer -fstrict-aliasing -O0 -UNDEBUG -fno-omit-frame-pointer -fno-strict-aliasing -mfpu=neon -Ijni/other_daemon_ex/../../third_party/opencv/jni/include -Ijni/other_daemon_ex/../dlib -I/home/huynq/Android/android-ndk-r11c/sources/cxx-stl/gnu-libstdc++/4.9/include -I/home/huynq/Android/android-ndk-r11c/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi-v7a/include -I/home/huynq/Android/android-ndk-r11c/sources/cxx-stl/gnu-libstdc++/4.9/include/backward -Ijni/other_daemon_ex -DANDROID -fPIC -DANDROID -fsigned-char -pie -fPIE -Wa,--noexecstack -Wformat -Werror=format-security -std=c++11 -frtti -fexceptions -std=c++11 -frtti -fexceptions -isystem /home/huynq/Android/android-ndk-r11c/platforms/android-8/arch-arm/usr/include -c jni/other_daemon_ex/../dlib/dlib/entropy_decoder/entropy_decoder_kernel_2.cpp -o ./obj/local/armeabi-v7a/objs-debug/face_landmark//dlib/dlib/entropy_decoder/entropy_decoder_kernel_2.o
make: /home/huynq/Android/android-ndk-r11c/toolchains/llvm/prebuilt/linux-x86/bin/clang++: Command not found
make: *** [obj/local/armeabi-v7a/objs-debug/TestSelectiveSearch/TestSelectiveSearch.o] Error 127
make: *** Waiting for unfinished jobs....
rm -f ./libs/arm64-v8a/gdb.setup ./libs/armeabi/gdb.setup ./libs/armeabi-v7a/gdb.setup ./libs/armeabi-v7a-hard/gdb.setup ./libs/mips/gdb.setup ./libs/mips64/gdb.setup ./libs/x86/gdb.setup ./libs/x86_64/gdb.setup
make: * [obj/local/armeabi-v7a/objs-debug/face_landmark//dlib//dlib/threads/threads_kernel_shared.o] Error 127
make: * [obj/local/armeabi-v7a/objs-debug/face_landmark//dlib/dlib/entropy_decoder/entropy_decoder_kernel_2.o] Error 127

Enhancement: Accept Grayscale as Input

Currently when detection is performed, the code reads the channels of a Mat object as input. But if it is in grayscale (Channels == 1) it is converted again to color:

detector.h

virtual inline int det(cv::Mat& image) {
    if(image.empty()) return 0;
    if(image.channels() == 1) {
        cv::cvtColor(image, image, CV_GRAY2BGR);
    } CHECK(image.channels() == 3);
    dlib::cv_image<dlib::bgr_pixel> img(image);
    mRets = mFaceDetector(img);
    return mRets.size();
}

However, the Dlib documentation points out that: "Any built in scalar type may be used as a grayscale pixel type. For example, unsigned char, int, double, etc."
So bgr_pixel type is not the only alternative.

Static library with headers

Hi @tzutalin ,

Is there a way to build dlib (only dlib) as a static lib and also get header files?

Missing liblibwebp.a

Hi, i'm trying to compile the library, and get an error:

$ ndk-build
Android NDK: ERROR:jni/jnilib_ex/Android.mk:webp: LOCAL_SRC_FILES points to a missing file    
Android NDK: Check that jni/jnilib_ex/../../opencv/jni/../3rdparty/libs/armeabi-v7a/liblibwebp.a exists  or that its path is correct  

The file is not found anywhere. I can see its part of OpenCV, but i guess it should be added to the readme

Build error with std namespace functions

Hi,

I really cannot build this using:

• NDK from Android SDK
• Dlib 19.2
• OpenCV 3.2
• latest minglog

As required I insert:

• Opencv
• minglog
• dlib
• dlib-android-app

locally in the respective folders. Now, I changed in jni/Application.mk :

APP_PLATFORM := android-19 (from 8 since my app later will have this release as minimum version required)
#APP_STL := gnustl_static
APP_STL := c++_static

I use python build.py command and:

• using gnustl_static stops here:

[armeabi-v7a] Compile++ thumb: miniglog <= logging.cc
In file included from jni/jni_detections/jni_pedestrian_det.cpp:14:
In file included from jni/jni_detections/detector.h:14:
In file included from jni/../dlib/dlib/image_processing.h:17:
In file included from jni/../dlib/dlib/image_loader/../image_processing/setup_hashed_features.h:8:
In file included from jni/../dlib/dlib/image_loader/../array2d/../geometry/../image_processing/scan_image_boxes.h:12:
In file included from jni/../dlib/dlib/image_loader/../array2d/../geometry/../image_processing/../image_transforms.h:28:
jni/../dlib/dlib/image_loader/../image_transforms/random_cropper.h:146:67: error: no member named 'round' in namespace 'std'
const unsigned long min_object_height_absolute = std::round(min_object_heightcrop_plan.rows);
~~~~~^
In file included from jni/jni_detections/jni_face_det.cpp:14:
In file included from jni/jni_detections/detector.h:14:
In file included from jni/../dlib/dlib/image_processing.h:17:
In file included from jni/../dlib/dlib/image_loader/../image_processing/setup_hashed_features.h:8:
In file included from jni/../dlib/dlib/image_loader/../array2d/../geometry/../image_processing/scan_image_boxes.h:12:
In file included from jni/../dlib/dlib/image_loader/../array2d/../geometry/../image_processing/../image_transforms.h:28:
jni/../dlib/dlib/image_loader/../image_transforms/random_cropper.h:146:67: error: no member named 'round' in namespace 'std'
const unsigned long min_object_height_absolute = std::round(min_object_heightcrop_plan.rows);
~~~~~^
[arm64-v8a] Compile++ : android_dlib <= jni_imageutils.cpp
[arm64-v8a] Compile++ : android_dlib <= jni_pedestrian_det.cpp
[arm64-v8a] Compile++ : android_dlib <= jni_face_det.cpp
1 error generated.
make: *** [obj/local/armeabi-v7a/objs/android_dlib/jni_pedestrian_det.o] Error 1
make: *** Waiting for unfinished jobs....
1 error generated.
make: *** [obj/local/armeabi-v7a/objs/android_dlib/jni_face_det.o] Error 1
Build Error

• using c++_static goes much forward until:

Android NDK: [x86_64] Modules to build: android_dlib
[armeabi-v7a] Compile++ arm : android_dlib <= jni_imageutils.cpp
[armeabi-v7a] Compile++ arm : android_dlib <= jni_pedestrian_det.cpp
[armeabi-v7a] Compile++ arm : android_dlib <= jni_face_det.cpp
[armeabi-v7a] Compile++ thumb: dlib <= threads_kernel_shared.cpp
[armeabi-v7a] Compile++ thumb: dlib <= entropy_decoder_kernel_2.cpp
[armeabi-v7a] Compile++ thumb: dlib <= base64_kernel_1.cpp
[armeabi-v7a] Compile++ thumb: dlib <= threads_kernel_1.cpp
[armeabi-v7a] Compile++ thumb: dlib <= threads_kernel_2.cpp
[armeabi-v7a] Compile++ thumb: jni_common <= jni_bitmap2mat.cpp
[armeabi-v7a] Compile++ thumb: jni_common <= jni_fileutils.cpp
[armeabi-v7a] Compile++ thumb: jni_common <= jni_utils.cpp
[armeabi-v7a] Compile++ thumb: jni_common <= rgb2yuv.cpp
[armeabi-v7a] Compile++ thumb: jni_common <= yuv2rgb.cpp
[armeabi-v7a] Compile++ thumb: miniglog <= logging.cc
[arm64-v8a] Compile++ : android_dlib <= jni_imageutils.cpp
[arm64-v8a] Compile++ : android_dlib <= jni_pedestrian_det.cpp
[arm64-v8a] Compile++ : android_dlib <= jni_face_det.cpp
[arm64-v8a] Compile++ : dlib <= threads_kernel_shared.cpp
[arm64-v8a] Compile++ : dlib <= entropy_decoder_kernel_2.cpp
[arm64-v8a] Compile++ : dlib <= base64_kernel_1.cpp
[arm64-v8a] Compile++ : dlib <= threads_kernel_1.cpp
[arm64-v8a] Compile++ : dlib <= threads_kernel_2.cpp
[arm64-v8a] Compile++ : jni_common <= jni_bitmap2mat.cpp
[arm64-v8a] Compile++ : jni_common <= jni_fileutils.cpp
[arm64-v8a] Compile++ : jni_common <= jni_utils.cpp
[arm64-v8a] Compile++ : jni_common <= rgb2yuv.cpp
[arm64-v8a] Compile++ : jni_common <= yuv2rgb.cpp
[arm64-v8a] Compile++ : miniglog <= logging.cc
[x86] Compile++ : android_dlib <= jni_imageutils.cpp
[x86] Compile++ : android_dlib <= jni_pedestrian_det.cpp
[x86] Compile++ : android_dlib <= jni_face_det.cpp
[x86] Compile++ : dlib <= threads_kernel_shared.cpp
[x86] Compile++ : dlib <= entropy_decoder_kernel_2.cpp
[x86] Compile++ : dlib <= base64_kernel_1.cpp
[x86] Compile++ : dlib <= threads_kernel_1.cpp
[x86] Compile++ : dlib <= threads_kernel_2.cpp
[x86] Compile++ : jni_common <= jni_bitmap2mat.cpp
[x86] Compile++ : jni_common <= jni_fileutils.cpp
[x86] Compile++ : jni_common <= jni_utils.cpp
[x86] Compile++ : jni_common <= rgb2yuv.cpp
[x86] Compile++ : jni_common <= yuv2rgb.cpp
[x86] Compile++ : miniglog <= logging.cc
[x86_64] Compile++ : android_dlib <= jni_imageutils.cpp
[x86_64] Compile++ : android_dlib <= jni_pedestrian_det.cpp
[x86_64] Compile++ : android_dlib <= jni_face_det.cpp
[x86_64] Compile++ : dlib <= threads_kernel_shared.cpp
[x86_64] Compile++ : dlib <= entropy_decoder_kernel_2.cpp
[x86_64] Compile++ : dlib <= base64_kernel_1.cpp
[x86_64] Compile++ : dlib <= threads_kernel_1.cpp
[x86_64] Compile++ : dlib <= threads_kernel_2.cpp
[x86_64] Compile++ : jni_common <= jni_bitmap2mat.cpp
[x86_64] Compile++ : jni_common <= jni_fileutils.cpp
[x86_64] Compile++ : jni_common <= jni_utils.cpp
[x86_64] Compile++ : jni_common <= rgb2yuv.cpp
[x86_64] Compile++ : jni_common <= yuv2rgb.cpp
[x86_64] Compile++ : miniglog <= logging.cc
[armeabi-v7a] StaticLibrary : libdlib.a
[armeabi-v7a] StaticLibrary : libjni_common.a
[armeabi-v7a] StaticLibrary : libminiglog.a
[arm64-v8a] StaticLibrary : libdlib.a
[arm64-v8a] StaticLibrary : libjni_common.a
[arm64-v8a] StaticLibrary : libminiglog.a
[x86] StaticLibrary : libdlib.a
[x86] StaticLibrary : libjni_common.a
[x86] StaticLibrary : libminiglog.a
[x86_64] StaticLibrary : libdlib.a
[x86_64] StaticLibrary : libjni_common.a
[armeabi-v7a] SharedLibrary : libandroid_dlib.so
[arm64-v8a] SharedLibrary : libandroid_dlib.so
jni/jni_detections/detector.h:42: error: undefined reference to 'cv::HOGDescriptor::detectMultiScale(cv::_InputArray const&, std::ndk1::vector<cv::Rect, std::ndk1::allocator<cv::Rect > >&, double, cv::Size, cv::Size, double, double, bool) const'
/Users/t/Downloads/compile/third_party/opencv/jni/../libs/armeabi-v7a/libopencv_objdetect.a(hog.cpp.o):hog.cpp:function std::vector<int, std::allocator >::resize(unsigned int, int): error: undefined reference to 'std::__throw_length_error(char const*)'

and it keeps going with errors like this for a very long while, ending with:

clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [obj/local/x86_64/libandroid_dlib.so] Error 1
Build Error

I tried also your NDK v13b but the result is exactly the same.
I am working from a OSX environment.

What's wrong? :(

How to write and debug these code, could you teach us?

How to write and debug these code, could you teach us?
Luckly，First, I build Succuss!

I cannot Run dLib in some tabs like Asus P10Y.

I dont know what is the reason but it works on every phone but it does not work on some tabs. I dont know what is the problem. No crash report is generated but ANR occurs each time camera is initialised. Can Anyone Please help us?????

Build errors

Hi,

I tried to setup everything as it should be to build the library (miniglog and opencv and dlib from the site) and I started the build having admin privileges, but I got an error:

In file included from jni/jni_detections/jni_face_det.cpp:14:
In file included from jni/jni_detections/detector.h:14:
In file included from jni/../dlib/dlib/image_processing.h:17:
In file included from jni/../dlib/dlib/image_loader/../image_processing/setup_hashed_features.h:8:
In file included from jni/../dlib/dlib/image_loader/../array2d/../geometry/../image_processing/scan_image_boxes.h:12:
In file included from jni/../dlib/dlib/image_loader/../array2d/../geometry/../image_processing/../image_transforms.h:28:
jni/../dlib/dlib/image_loader/../image_transforms/random_cropper.h:146:67: error: no member named 'round' in namespace 'std'
const unsigned long min_object_height_absolute = std::round(min_object_heightcrop_plan.rows);
~^
In file included from jni/jni_detections/jni_pedestrian_det.cpp:14:
In file included from jni/jni_detections/detector.h:14:
In file included from jni/../dlib/dlib/image_processing.h:17:
In file included from jni/../dlib/dlib/image_loader/../image_processing/setup_hashed_features.h:8:
In file included from jni/../dlib/dlib/image_loader/../array2d/../geometry/../image_processing/scan_image_boxes.h:12:
In file included from jni/../dlib/dlib/image_loader/../array2d/../geometry/../image_processing/../image_transforms.h:28:
jni/../dlib/dlib/image_loader/../image_transforms/random_cropper.h:146:67: error: no member named 'round' in namespace 'std'
const unsigned long min_object_height_absolute = std::round(min_object_heightcrop_plan.rows);
~^
[armeabi-v7a] Compile++ thumb: dlib <= threads_kernel_shared.cpp
[armeabi-v7a] Compile++ thumb: dlib <= entropy_decoder_kernel_2.cpp
[armeabi-v7a] Compile++ thumb: dlib <= base64_kernel_1.cpp
[armeabi-v7a] Compile++ thumb: miniglog <= logging.cc
[arm64-v8a] Compile++ : android_dlib <= jni_imageutils.cpp
[arm64-v8a] Compile++ : android_dlib <= jni_pedestrian_det.cpp
[arm64-v8a] Compile++ : android_dlib <= jni_face_det.cpp
1 error generated.
1 error generated.
make: *** [obj/local/armeabi-v7a/objs/android_dlib/jni_pedestrian_det.o] Error 1
make: *** Waiting for unfinished jobs....
make: *** [obj/local/armeabi-v7a/objs/android_dlib/jni_face_det.o] Error 1
Build Error

May I provide additional details?
I noticed it's a NDK related bug. Which version would be better to use?

Regards

Build error: No OpenCV

Hey, I was trying to build following your tutorial exactly with

python build.py

But an error indicates the OpenCV is not present. Can you give any explanations on how to add it?

make: *** no rule to make target '/home/ezequiel/dlib-android/third_party/opencv/jni/OpenCV.mk'. Stop.

Also, which version exactly of OpenCV must be used?

Is there any support for dlib.get_frontal_face_detector()?

Hi,
I want to use get_frontal_face_detector() method of dlib in android application. Is there any support for that?

compile face_detection_ex.cpp with dlib-android repo failed. But with dlib repo it's ok

OS: macOS 10.12
clang++ : Apple LLVM version 8.1.0 (clang-802.0.38)

step1: I want to use dlib and opencv on android project. The dlib-android build is ok. But when linking dlib with my source file. The compiler complains as follows:

_"USER_ERROR__missing_dlib_all_source_cpp_file__OR__inconsistent_use_of_DEBUG_or_ENABLE_ASSERTS_preprocessor_directives_"

step2: I add dlib/all/source.cpp to my source files. But when compiling source.cpp, the compiler complains another error.

../matrix/matrix_utilities.h:2665:29: error: static_assert expression is not an integral constant expression COMPILE_TIME_ASSERT(pixel_traits<P>::num > 0);

step3: I also make a small test by using below command to compile dlib example face_detection_ex.cpp.

For dlib-android repo, the compiler complains with the same error as the step2.
For dlib repo, the compilation of face_detection_ex.cpp is ok .

g++ -std=c++11 -DDLIB_PNG_SUPPORT -DDLIB_JPEG_SUPPORT -DUSE_AVX_INSTRUCTIONS=ON -I.. ../dlib/all/source.cpp -I/usr/local/opt/X11/include/ -I/usr/local/Cellar/jpeg/8d/include -lpthread -L/usr/local/opt/X11/lib -lX11 face_detection_ex.cpp -o face_detection_ex -L/usr/local/Cellar/libpng/1.6.29/lib -lpng16 -L/usr/local/Cellar/jpeg/8d/lib -ljpeg

Suggested optimizations in DLibHOGFaceDetector

While looking into #13 issue (found at stackoverflow), I found that your way of using dlib face detection can be optimized for running about 2x-20x times faster:

1. You should construct face detector once inside constructor

virtual inline int det(const cv::Mat& image) {
    LOG(INFO) << "com_tzutalin_dlib_PeopleDet go to det(mat)";
    dlib::frontal_face_detector detector = dlib::get_frontal_face_detector();

Here you are constructing dlib::frontal_face_detector every call of detection function. Consider moving it into constructor - you will get up to 2x performance gain

2. Your code will not work with RGBA and GRAYSCALE images

 dlib::cv_image<dlib::bgr_pixel> img(image);
    mRets = detector(img);

If image (cv::Mat) will be not an BGR image, your code will crash. Consider adding something like this:
if (image.channels() == 4)
cv::cvtColor(image, image, CV_BGRA2BGR);
else if (image.channels() == 1)
cv::cvtColor(image, image, CV_GRAY2BGR);

3. Neither face detection nor shape prediction (landmarks) need color information. Consider converting all images into greyscales and running detector on them - this will give you 2x performance gain

4. No need to detect small faces.
   Dlib face detector will detect faces with size of 80x80 and larger. While modern smartphones will capture 10+ MP images. Face detector will run several seconds for each frame.
   I recommend you adding parameter that will limit minimal detected face size so you can downscale input image several times to skip small faces.

unsigned min_face_size = 200; //px
double k = 80.0 / min_face_size;
cv::resize(image, image, cv::Size(), k, k);

Also making region of interest and cropping image is extremely efficient in video processing

5. shape_predictor can be constructed once and made static
   This object takes extremely large amount of RAM (about 100 MB) and construction time should be about 5+ seconds. If somebody will need several detectors (or construct/destruct it several times) - this object (shape predictor) will be deserialized several times, while its operator() is const. Documentation says that you can use one global shape predictor (static class member) safely from several threads

6. making Release build.
   99% of Dlib's code is based on headers, and making debug build of your library will produce inefficient code. Consider running ndk-build in release mode with NDK_BUILD=0 param. This is also a possible solution of #13 issue

I am not developing Android code so I can't make PR for this. And all of this is just a suggestion. As you are the author - feel free to ignore them :)

How to estimate the face pose?

Any ideas on how to get the face rotation in angles from landmarks? Like this:

Flickery landmarks when converting raw bytes to grayscale

Hi, I've created a new function in the jni_face_detect that takes the camera preview as raw bytes, the face box coordinates computed with Android API and I just need to detect the landmarks of one single face with dlib (I want to skip the face detection phase).
The raw bytes are converted from YUV to grayscale and then rotated, scaled and flipped according to my UI TextureView size.
The landmarks are identified in a very little time but once displayed on the device screen they're very flickery even if the face is still and the face box coordinates remain the same, there's always a "micro" variation in the landmarks coordinates. This doesn't happen using the function jniBitmapDetect provided with the original .cpp file, that uses, instead, bitmaps. In that case, the landmarks are always very stable. I guess I'm messing something up during the conversions or maybe I'm not passing the right pointers...

So, taking inspiration from #39 my code looks like

   JNIEXPORT jobject JNICALL DLIB_FACE_JNI_METHOD(jniNewLandmarksDetection)(JNIEnv* env, jobject thiz, jbyteArray rawBytes, jfloatArray rect, jint width, jint height, jint widthB, jint heightB, jint rotation, jint scale) {
    jobject jDetRet = JNI_VisionDetRet::createJObject(env);
    g_pJNI_VisionDetRet->setLabel(env, jDetRet, "face"); 

    jbyte* b_data = (env)->GetByteArrayElements(rawBytes, 0);
    cv::Mat yuvMat = cv::Mat(height+height/2, width, CV_8UC1, (unsigned char*)b_data);
    cv::Mat grayMat = cv::Mat(height, width, CV_8UC1);
    cv::cvtColor(yuvMat, grayMat, CV_YUV2GRAY_NV21);
    
    cv::Mat scaledGrayscale;
    cv::resize(grayMat, scaledGrayscale, Size(heightB/scale,widthB/scale), 0, 0, INTER_LINEAR);
    cv::flip(scaledGrayscale,scaledGrayscale,0);
  
    jfloat* r = env->GetFloatArrayElements(rect,0);
    dlib::rectangle rec(r[3], r[0], r[1], r[2]);
    g_pJNI_VisionDetRet->setRect(env, jDetRet, r[3], r[0], r[1], r[2]);
    
    DetectorPtr detPtr = getDetectorPtr(env, thiz);        
    dlib::cv_image<unsigned char> img(scaledGrayscale);
    dlib::full_object_detection shape = detPtr->msp(img, rec);
    
    for (int k=0; k<shape.num_parts(); k++) {
        int x = shape.part(k).x();
        int y = shape.part(k).y();
        g_pJNI_VisionDetRet->addLandmark(env, jDetRet, x, y);
    }
    
    //Test, these two pics look good and they're identical
    dlib::save_bmp(img,"/mnt/sdcard/DCIM/input.bmp");
    cv::imwrite("/mnt/sdcard/DCIM/det.jpg", scaledGrayscale);
    return jDetRet;
}`

Can anyone see the possible cause of the flickering?

aremabi compile error

When I am trying to build for armeabi error is given, seems that it is related to atomic lib

Help manually building jnilib_ex

I'm trying to build a slightly modified version of the jni_people_det shared library (without changing imports just changing the name, just to see if I can build it on my own).
I've decided to put everything together into a single Android.mk file, therefore I've got everything inside the jni folder (without having two different Android.mk files).

I can't make it work since it doesn't find the required headers, it gives me <my-folder>\dlib-android/jni\detector.h:12:10: fatal error: 'dlib/image_loader/load_image.h' file not found...what am I doing wrong here? Should I include every single .h that's required in detector.h?

-Please see attached file, it's txt since I can't upload a .mk, I've checked that the dlib folder path and miniglog folder path are correct-
Android.mk.txt

Thanks.

ARM NEON SUPPORT?

Hi, dlib repo added a simd for ARM Neon

1. Can I make a .so file with neon support (android version)?
2. If so, how can I make it?, Is it helpful to boost the face detection time?

Thank you so much