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This library have the function of keypoints extraction and matching, but how can i see the results? Or how can I display the results combine with OpenCV?
Could you give me some advice?
i received an error from vs2017 with "nvcc is not a command and cmd exited 9009" but the i run nvcc successed by typing nvcc to my console.
Hi, I successfully run this code on Ubuntu 16.04 and I saved the result as a SIFT file which looks like:
5115 128
2.12 679.77 1.005 1.807
80 128 26 10 7 0 0 3 17 51 28 75 111 90 8 4 0 6 15 22
21 127 9 1 0 2 2 0 0 2 0 0 100 128 10 1 3 4 2 8
128 81 17 3 5 73 57 91 8 7 10 5 6 128 75 19 0 0 0 0
0 2 0 0 106 42 2 0 1 5 10 30 128 128 128 18 1 5 5 23
7 30 128 22 3 24 9 4 0 0 0 0 0 0 0 0 22 90 6 0
0 0 0 1 18 66 51 46 10 0 0 0 0 1 27 24 7 0 0 0
0 0 0 0 0 0 0 0
but I don't understand what it means, can you help me to explain it, thanks a lot!
Hello!
Thanks for your great work first!
I don't know why the detected keypoints are less than the keypoints detected by the VLFeat?
Can I change some parameters to increase the number of the detected keypoints?
Thank you very much!
Hi,
This is not an issue, but it's a question.
I heard somewhere that using SIFT match, we can do a first pass of pair matching using only the biggest features and the results are proportionnal to the end result. It can be used to optimize a little, because we can pair match with the 100 biggest elements for example and if the pair matching is bigger than X%, we do the feature amtching with all the feature of the 2 images.
(I'm not sure if this is understandable, sorry)
My question is, using Sift-GPU, how can I easily have the biggest features in an image?
Best regards,
Raphaël S.
hello,thank you for your good job.
if i have a thread extract features and descriptors , and store in a vector.and another thread run features match work with the features in the vector. can this work?
i have try this ,and can not get a good result. does SiftGPU support this?
SIFTGPU is very slow when the dll is finally released, it is very FreeLibrary
how to calculate features' response value like SIFT in OpenCV?
Would you like to wrap any pointer data members with the class template “std::unique_ptr”?
@pitzer , Thank You for making this package available.
Is there a way that this can be released with a MIT, Apache2 license, or some license which allows commercial use? COLMAP uses your feature extractor for parallel GPU processing and with the current license, I can use COLMAP, NerfStudio, and other Photogrammetry programs which are based upon COLMAP for personal / hobby use, however, I can not use it at work since doesn't specify that it can be used commercially. Do you know if such a change is possible? Or do you know the process of attaining a commercial license?
Thanks!
I ran the SIFT GPU for a test image and for one of the features the descriptor value is greater than 255. The normalized feature descriptor also had value greater than 1.0.
Please help me?
As per my understanding, the features are normalized (lowe paper)....
Hi,
when trying to compile this program I meet a problem:
src/SiftGPU/GLTexImage.cpp:47:23: fatal error: IL/il.h: No such file or directory
#include "IL/il.h"
ubuntu 14.04, with cuda installed.
Hi, pitzer.
I have tested your codes(cuda-based version) in Ubuntu 14.04 with cuda 7.5
I found the CPU utilization is very high.
Most of the Time, it is 100 % .
This would prevented my machine from doing any other CPU intensive jobs.
I found that this is an issue with the cuda runtime library.
The asynchronous Memcpy need occasionally call clock_gettime to query the states of the operation.
And I googled this: link
The link above says: cudaDeviceScheduleBlockingSync
turned out to be a solution.
Regards.
An extra null pointer check is not needed in functions like the following.
Hi all!
I'm quite new in CMakeFiles and other so my question might be trivial. If yes, I'm sorry.
I'm working on VS2017, windows 7 (x64)and I'm trying to build SiftGPU.
Since I use VS, I used the sln project, and resolved all linking errors. Now it compiles fine, but when I try to execute simpleSIFT.cpp, it generate 2 errors :
"Unable to start 'E:......\msvc\SiftGPU....\bin\SifTGPU.dll' ", 'E:......\msvc\SiftGPU....\bin\SifTGPU.dll' is not a valid Win32 app.
What should I do?
Do I have to build the project with Cmake in order to make it works? :/
Thanks
Line 3 of src/SiftGPU/CMakeLists.txt:
find_package(Glew)
is incorrect. It should be
find_package(GLEW)
Making this change lets me compile successfully in Ubuntu. It probably works in Windows even without this change, anyway.
_sigma
is not released in destructor.
https://github.com/pitzer/SiftGPU/blob/master/src/SiftGPU/SiftGPU.cpp#L464
Hello Pitzer,
Just trying to compile SiftGPU on a iMac (late 2013), with this error output after just running 'make':
Seems like errors in the code, but I guess the code worked elsewhere, so what is that I'm doing wrong?
~/R/SiftGPU $ make
mkdir -p build
mkdir -p bin
sed -i -e 's/\\/\//g' demos/*.bat
ar rcs bin/libsiftgpu.a build/FrameBufferObject.o build/GlobalUtil.o build/GLTexImage.o build/ProgramGLSL.o build/ProgramGPU.o build/ShaderMan.o build/SiftGPU.o build/SiftPyramid.o build/PyramidGL.o build/SiftMatch.o
/Library/Developer/CommandLineTools/usr/bin/ranlib: file: bin/libsiftgpu.a(ProgramGPU.o) has no symbols
g++ -o bin/libsiftgpu.so build/FrameBufferObject.o build/GlobalUtil.o build/GLTexImage.o build/ProgramGLSL.o build/ProgramGPU.o build/ShaderMan.o build/SiftGPU.o build/SiftPyramid.o build/PyramidGL.o build/SiftMatch.o -lGLEW -framework GLUT -framework OpenGL -lIL -Iinclude - fPIC -L/usr/lib -L./bin -L./lib -Wall -Wno-deprecated -pthread -DWINDOW_PREFER_GLUT - L/Users/prb2pal/Development/Resources/lib -shared -fPIC
clang: warning: argument unused during compilation: '-pthread'
ld: warning: directory not found for option '-L./lib'
ld: warning: directory not found for option '-L/Users/prb2pal/Development/Resources/lib'
g++ -o bin/TestWinGlut src/TestWin/TestWinGlut.cpp src/TestWin/BasicTestWin.cpp bin/libsiftgpu.a -lGLEW -framework GLUT -framework OpenGL -lIL -Iinclude -fPIC -L/usr/lib -L./bin -L./lib -Wall -Wno-deprecated -pthread -DWINDOW_PREFER_GLUT -L/Users/prb2pal/Development/Resources/lib
In file included from src/TestWin/BasicTestWin.cpp:43:
In file included from src/TestWin/BasicTestWin.h:34:
src/TestWin/GLTransform.h:105:3: error: use of undeclared identifier 'glTranslated'; did you mean 'translate'?
glTranslated(cx*es, cy*es, 0.0);
^~~~~~~~~~~~
translate
src/TestWin/GLTransform.h:89:8: note: 'translate' declared here
void translate(int dx, int dy, int dz =0)
^
src/TestWin/GLTransform.h:106:3: error: use of undeclared identifier 'glTranslated'; did you mean 'translate'?
glTranslated(t[0] ,t[1] ,t[2]);
^~~~~~~~~~~~
translate
src/TestWin/GLTransform.h:89:8: note: 'translate' declared here
void translate(int dx, int dy, int dz =0)
^
src/TestWin/GLTransform.h:107:3: error: use of undeclared identifier 'glScaled'
glScaled(s,s,s);
^
src/TestWin/GLTransform.h:108:3: error: use of undeclared identifier 'glTranslated'; did you mean 'translate'?
glTranslated(-cx, - cy, 0);
^~~~~~~~~~~~
translate
src/TestWin/GLTransform.h:89:8: note: 'translate' declared here
void translate(int dx, int dy, int dz =0)
^
src/TestWin/BasicTestWin.cpp:75:15: error: use of undeclared identifier 'GL_MODELVIEW'
glMatrixMode(GL_MODELVIEW);
^
src/TestWin/BasicTestWin.cpp:76:2: error: use of undeclared identifier 'glLoadIdentity'
glLoadIdentity();
^
src/TestWin/BasicTestWin.cpp:77:10: error: use of undeclared identifier 'GL_COLOR_BUFFER_BIT'
glClear(GL_COLOR_BUFFER_BIT);
^
src/TestWin/BasicTestWin.cpp:80:2: error: use of undeclared identifier 'glFlush'
glFlush();
^
src/TestWin/BasicTestWin.cpp:81:2: error: use of undeclared identifier 'glFinish'
glFinish();
^
src/TestWin/BasicTestWin.cpp:189:2: error: use of undeclared identifier 'glViewport'
glViewport(0, 0, w, h);
^
src/TestWin/BasicTestWin.cpp:190:18: error: use of undeclared identifier 'GL_PROJECTION'
glMatrixMode(GL_PROJECTION);
^
src/TestWin/BasicTestWin.cpp:191:5: error: use of undeclared identifier 'glLoadIdentity'
glLoadIdentity();
^
src/TestWin/BasicTestWin.cpp:192:2: error: use of undeclared identifier 'glOrtho'
glOrtho(0, w, h, 0,0,1);
^
src/TestWin/BasicTestWin.cpp:193:18: error: use of undeclared identifier 'GL_MODELVIEW'
glMatrixMode(GL_MODELVIEW);
^
src/TestWin/BasicTestWin.cpp:194:5: error: use of undeclared identifier 'glLoadIdentity'
glLoadIdentity();
^
15 errors generated.
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