dorian3d/dlib

C++ library with several utilities

DLib

DLib is a collection of C++ classes to solve common tasks in C++ programs, as well as to offer additional functionality to use OpenCV data and to solve computer vision problems.

I have found myself using these functions very often, so I hope they may be useful to other researchers and developers too.

Documentation

DLib is divided into 3 libraries for different purposes:

• DUtils: utilities for several common C++ program requirements. It includes these classes:

  • BinaryFile: reads/writes binary files
  • LineFile: reads/writes text files by lines
  • ConfigFile: reads/writes text files with the format key = value
  • FileFunctions: mkdir, rmdir, dir... functionality
  • Math: math functions
  • Random: pseudo-random number functions
  • STL: functions for STL containers
  • StringFunctions: functions to manipulae strings
  • Timestamp: operates with timestamps
  • TimeManager: manages collections of timestamps
  • Profiler: measures execution time of portions of code
  • DebugFunctions: functions to measure memory consumption

• DUtilsCV: utility functions for OpenCV data types. Classes included:

  • Drawing: functions to draw keypoints, data, axes...
  • GUI: shows images in windows and allows some user input
  • IO: I/O functions for storage and printing
  • Mat: functions to remove rows from matrices
  • Transformations: functions to deal with spatial transformations
  • Types: functions to convert between OpenCV data types

• DVision: functions to solve computer vision tasks. Classes included:

  • BRIEF: implementation of the BRIEF descriptor
  • FSolver: implementation of the RANSAC + 8-point algorithm to compute fundamental matrices between images
  • HSolver: implementation of the RANSAC + DLT algorithm to compute homographies between images
  • ImageFunctions: functions to get patches from images
  • BundleCamera: reads/writes camera files created by the Bundle software
  • PMVSCamera, PatchFile, PLYFile: read/write data created by the PMVS software
  • PixelPointFile, Matches: read/write multi-purpose pixel and 3D data files

dlib's Issues

rename dlib?

Hi,

since there seems to be another project also named dlib http://dlib.net/ , have you got a plan to have this DLib renamed?

Cheers
Pei

OpenCV compatibility issue ???

[ 17%] Building CXX object CMakeFiles/DLib.dir/src/DUtils/DebugFunctions.cpp.o
/usr/bin/c++  -DDLib_EXPORTS -I....../DLib/include/DUtils -I....../DLib/include/DUtilsCV -I....../DLib/include/DVision -isystem /usr/local/include/opencv4  -Wall -pedantic -O3 -DNDEBUG -fPIC   -o CMakeFiles/DLib.dir/src/DUtils/DebugFunctions.cpp.o -c ....../DLib/src/DUtils/DebugFunctions.cpp
....../DLib/src/DUtilsCV/GUI.cpp: In static member function ‘static int DUtilsCV::GUI::showImage(const cv::Mat&, bool, DUtilsCV::GUI::tWinHandler*, int)’:
....../DLib/src/DUtilsCV/GUI.cpp:42:27: error: ‘CV_WINDOW_AUTOSIZE’ was not declared in this scope
     if(autosize) flags |= CV_WINDOW_AUTOSIZE;
                           ^~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:42:27: note: suggested alternative: ‘CV_MINOR_VERSION’
     if(autosize) flags |= CV_WINDOW_AUTOSIZE;
                           ^~~~~~~~~~~~~~~~~~
                           CV_MINOR_VERSION
....../DLib/src/DUtilsCV/GUI.cpp: In static member function ‘static int DUtilsCV::GUI::showImageInfo(const cv::Mat&, bool, DUtilsCV::GUI::tWinHandler*)’:
....../DLib/src/DUtilsCV/GUI.cpp:84:36: error: ‘CV_GRAY2RGB’ was not declared in this scope
     cv::cvtColor(image, image_rgb, CV_GRAY2RGB);
                                    ^~~~~~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:84:36: note: suggested alternative: ‘CV_RGB’
     cv::cvtColor(image, image_rgb, CV_GRAY2RGB);
                                    ^~~~~~~~~~~
                                    CV_RGB
....../DLib/src/DUtilsCV/GUI.cpp: In static member function ‘static bool DUtilsCV::GUI::windowExists(const tWinHandler&)’:
....../DLib/src/DUtilsCV/GUI.cpp:179:10: error: ‘cvGetWindowHandle’ was not declared in this scope
   return cvGetWindowHandle(hwnd.c_str()) != NULL;
          ^~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:179:10: note: suggested alternative: ‘tWinHandler’
   return cvGetWindowHandle(hwnd.c_str()) != NULL;
          ^~~~~~~~~~~~~~~~~
          tWinHandler
....../DLib/src/DUtilsCV/GUI.cpp: In member function ‘void DUtilsCV::GUI::MouseHandler::attachToClicks(const tWinHandler&)’:
....../DLib/src/DUtilsCV/GUI.cpp:240:23: error: ‘CV_EVENT_LBUTTONUP’ was not declared in this scope
   m_valid_events[0] = CV_EVENT_LBUTTONUP;
                       ^~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp: In member function ‘void DUtilsCV::GUI::MouseHandler::attachToMotions(const tWinHandler&)’:
....../DLib/src/DUtilsCV/GUI.cpp:250:23: error: ‘CV_EVENT_MOUSEMOVE’ was not declared in this scope
   m_valid_events[0] = CV_EVENT_MOUSEMOVE;
                       ^~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp: In static member function ‘static void DUtilsCV::Drawing::drawKeyPoints(cv::Mat&, const std::vector<cv::KeyPoint>&, bool, bool)’:
....../DLib/src/DUtilsCV/Drawing.cpp:26:3: error: ‘CvScalar’ was not declared in this scope
   CvScalar colors[4] = {
   ^~~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp: In member function ‘void DUtilsCV::GUI::MouseHandler::listenToAll()’:
....../DLib/src/DUtilsCV/GUI.cpp:278:23: error: ‘CV_EVENT_LBUTTONDOWN’ was not declared in this scope
   m_valid_events[0] = CV_EVENT_LBUTTONDOWN;
                       ^~~~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:42:11: error: ‘CvScalar’ does not name a type
     const CvScalar *color;
           ^~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:44:7: error: ‘color’ was not declared in this scope
       color = &colors[3];
       ^~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:44:7: note: suggested alternative: ‘cvFloor’
       color = &colors[3];
       ^~~~~
       cvFloor
....../DLib/src/DUtilsCV/Drawing.cpp:44:16: error: ‘colors’ was not declared in this scope
       color = &colors[3];
                ^~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:44:16: note: suggested alternative: ‘clock’
       color = &colors[3];
                ^~~~~~
                clock
....../DLib/src/DUtilsCV/Drawing.cpp:46:7: error: ‘color’ was not declared in this scope
       color = &colors[it->octave-1];
       ^~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:46:7: note: suggested alternative: ‘cvFloor’
       color = &colors[it->octave-1];
       ^~~~~
       cvFloor
....../DLib/src/DUtilsCV/Drawing.cpp:46:16: error: ‘colors’ was not declared in this scope
       color = &colors[it->octave-1];
                ^~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:279:23: error: ‘CV_EVENT_LBUTTONUP’ was not declared in this scope
   m_valid_events[1] = CV_EVENT_LBUTTONUP;
                       ^~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:46:16: note: suggested alternative: ‘clock’
       color = &colors[it->octave-1];
                ^~~~~~
                clock
....../DLib/src/DUtilsCV/Drawing.cpp:51:23: error: ‘cvPoint’ was not declared in this scope
     cv::circle(image, cvPoint(c1, r1), (int)s, *color, 1);
                       ^~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:51:23: note: suggested alternative: ‘cvRound’
     cv::circle(image, cvPoint(c1, r1), (int)s, *color, 1);
                       ^~~~~~~
                       cvRound
....../DLib/src/DUtilsCV/Drawing.cpp:51:49: error: ‘color’ was not declared in this scope
     cv::circle(image, cvPoint(c1, r1), (int)s, *color, 1);
                                                 ^~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:51:49: note: suggested alternative: ‘cvFloor’
     cv::circle(image, cvPoint(c1, r1), (int)s, *color, 1);
                                                 ^~~~~
                                                 cvFloor
....../DLib/src/DUtilsCV/Drawing.cpp: In static member function ‘static void DUtilsCV::Drawing::drawCorrespondences(cv::Mat&, const cv::Mat&, const cv::Mat&, const std::vector<cv::KeyPoint>&, const std::vector<cv::KeyPoint>&, const std::vector<int>&, const std::vector<int>&)’:
....../DLib/src/DUtilsCV/Drawing.cpp:105:30: error: ‘CV_RGB2GRAY’ was not declared in this scope
     cv::cvtColor(img1, aux1, CV_RGB2GRAY);
                              ^~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:105:30: note: suggested alternative: ‘CV_RGB’
     cv::cvtColor(img1, aux1, CV_RGB2GRAY);
                              ^~~~~~~~~~~
                              CV_RGB
....../DLib/src/DUtilsCV/Drawing.cpp:110:30: error: ‘CV_RGB2GRAY’ was not declared in this scope
     cv::cvtColor(img2, aux2, CV_RGB2GRAY);
                              ^~~~~~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:280:23: error: ‘CV_EVENT_LBUTTONDBLCLK’ was not declared in this scope
   m_valid_events[2] = CV_EVENT_LBUTTONDBLCLK;
                       ^~~~~~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:110:30: note: suggested alternative: ‘CV_RGB’
     cv::cvtColor(img2, aux2, CV_RGB2GRAY);
                              ^~~~~~~~~~~
                              CV_RGB
....../DLib/src/DUtilsCV/Drawing.cpp:118:3: error: ‘IplImage’ was not declared in this scope
   IplImage ipl_im = IplImage(im);
   ^~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:118:3: note: suggested alternative: ‘image’
   IplImage ipl_im = IplImage(im);
   ^~~~~~~~
   image
....../DLib/src/DUtilsCV/Drawing.cpp:119:13: error: ‘ipl_ret’ was not declared in this scope
   IplImage* ipl_ret = &ipl_im;
             ^~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:119:24: error: ‘ipl_im’ was not declared in this scope
   IplImage* ipl_ret = &ipl_im;
                        ^~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:121:3: error: ‘CvRect’ was not declared in this scope
   CvRect roi;
   ^~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:281:23: error: ‘CV_EVENT_RBUTTONDOWN’ was not declared in this scope
   m_valid_events[3] = CV_EVENT_RBUTTONDOWN;
                       ^~~~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:121:3: note: suggested alternative: ‘select’
   CvRect roi;
   ^~~~~~
   select
....../DLib/src/DUtilsCV/Drawing.cpp:122:3: error: ‘roi’ was not declared in this scope
   roi.x = 0;
   ^~~
....../DLib/src/DUtilsCV/Drawing.cpp:122:3: note: suggested alternative: ‘atoi’
   roi.x = 0;
   ^~~
   atoi
....../DLib/src/DUtilsCV/Drawing.cpp:127:3: error: ‘cvSetImageROI’ was not declared in this scope
   cvSetImageROI(ipl_ret, roi);
   ^~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:128:12: error: expected ‘;’ before ‘ipl_aux1’
   IplImage ipl_aux1 = IplImage(aux1);
            ^~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:129:11: error: ‘ipl_aux1’ was not declared in this scope
   cvCopy(&ipl_aux1, ipl_ret);
           ^~~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:282:23: error: ‘CV_EVENT_RBUTTONUP’ was not declared in this scope
   m_valid_events[4] = CV_EVENT_RBUTTONUP;
                       ^~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:129:11: note: suggested alternative: ‘aux1’
   cvCopy(&ipl_aux1, ipl_ret);
           ^~~~~~~~
           aux1
....../DLib/src/DUtilsCV/Drawing.cpp:129:3: error: ‘cvCopy’ was not declared in this scope
   cvCopy(&ipl_aux1, ipl_ret);
   ^~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:129:3: note: suggested alternative: ‘cvCeil’
   cvCopy(&ipl_aux1, ipl_ret);
   ^~~~~~
   cvCeil
....../DLib/src/DUtilsCV/Drawing.cpp:137:12: error: expected ‘;’ before ‘ipl_aux2’
   IplImage ipl_aux2 = IplImage(aux2);
            ^~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:138:11: error: ‘ipl_aux2’ was not declared in this scope
   cvCopy(&ipl_aux2, ipl_ret);
           ^~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:138:11: note: suggested alternative: ‘aux2’
   cvCopy(&ipl_aux2, ipl_ret);
           ^~~~~~~~
           aux2
....../DLib/src/DUtilsCV/Drawing.cpp:140:2: error: ‘cvResetImageROI’ was not declared in this scope
  cvResetImageROI(ipl_ret);
  ^~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:283:23: error: ‘CV_EVENT_RBUTTONDBLCLK’ was not declared in this scope
   m_valid_events[5] = CV_EVENT_RBUTTONDBLCLK;
                       ^~~~~~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:143:26: error: ‘CV_GRAY2RGB’ was not declared in this scope
  cv::cvtColor(im, image, CV_GRAY2RGB);
                          ^~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:143:26: note: suggested alternative: ‘CV_RGB’
  cv::cvtColor(im, image, CV_GRAY2RGB);
                          ^~~~~~~~~~~
                          CV_RGB
....../DLib/src/DUtilsCV/Drawing.cpp:154:5: error: ‘CvScalar’ was not declared in this scope
     CvScalar color = cvScalar(
     ^~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:159:21: error: ‘cvPoint’ was not declared in this scope
     cv::line(image, cvPoint(mx, my), cvPoint(px, py), color, 1);
                     ^~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:284:23: error: ‘CV_EVENT_MBUTTONDOWN’ was not declared in this scope
   m_valid_events[6] = CV_EVENT_MBUTTONDOWN;
                       ^~~~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:159:21: note: suggested alternative: ‘cvRound’
     cv::line(image, cvPoint(mx, my), cvPoint(px, py), color, 1);
                     ^~~~~~~
                     cvRound
....../DLib/src/DUtilsCV/Drawing.cpp:159:55: error: ‘color’ was not declared in this scope
     cv::line(image, cvPoint(mx, my), cvPoint(px, py), color, 1);
                                                       ^~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:159:55: note: suggested alternative: ‘cols’
     cv::line(image, cvPoint(mx, my), cvPoint(px, py), color, 1);
                                                       ^~~~~
                                                       cols
....../DLib/src/DUtilsCV/Drawing.cpp: In static member function ‘static void DUtilsCV::Drawing::drawReferenceSystem(cv::Mat&, const cv::Mat&, const cv::Mat&, const cv::Mat&, const cv::Mat&, float)’:
....../DLib/src/DUtilsCV/Drawing.cpp:209:3: error: ‘CvScalar’ was not declared in this scope
   CvScalar bluez, greeny, redx;
   ^~~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:285:23: error: ‘CV_EVENT_MBUTTONUP’ was not declared in this scope
   m_valid_events[7] = CV_EVENT_MBUTTONUP;
                       ^~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:213:5: error: ‘bluez’ was not declared in this scope
     bluez = cvScalar(255,0,0);
     ^~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:213:13: error: ‘cvScalar’ was not declared in this scope
     bluez = cvScalar(255,0,0);
             ^~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:214:5: error: ‘greeny’ was not declared in this scope
     greeny = cvScalar(0,255,0);
     ^~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:214:5: note: suggested alternative: ‘getenv’
     greeny = cvScalar(0,255,0);
     ^~~~~~
     getenv
....../DLib/src/DUtilsCV/Drawing.cpp:215:5: error: ‘redx’ was not declared in this scope
     redx = cvScalar(0,0,255);
     ^~~~
....../DLib/src/DUtilsCV/Drawing.cpp:215:5: note: suggested alternative: ‘rindex’
     redx = cvScalar(0,0,255);
     ^~~~
     rindex
....../DLib/src/DUtilsCV/Drawing.cpp:219:5: error: ‘bluez’ was not declared in this scope
     bluez = cvScalar(18,18,18);
     ^~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:219:13: error: ‘cvScalar’ was not declared in this scope
     bluez = cvScalar(18,18,18);
             ^~~~~~~~
....../DLib/src/DUtilsCV/GUI.cpp:286:23: error: ‘CV_EVENT_MBUTTONDBLCLK’ was not declared in this scope
   m_valid_events[8] = CV_EVENT_MBUTTONDBLCLK;
                       ^~~~~~~~~~~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:220:5: error: ‘greeny’ was not declared in this scope
     greeny = cvScalar(182,182,182);
     ^~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:220:5: note: suggested alternative: ‘getenv’
     greeny = cvScalar(182,182,182);
     ^~~~~~
     getenv
....../DLib/src/DUtilsCV/Drawing.cpp:221:5: error: ‘redx’ was not declared in this scope
     redx = cvScalar(120,120,120);
     ^~~~
....../DLib/src/DUtilsCV/Drawing.cpp:221:5: note: suggested alternative: ‘rindex’
     redx = cvScalar(120,120,120);
     ^~~~
     rindex
....../DLib/src/DUtilsCV/Drawing.cpp:224:45: error: ‘redx’ was not declared in this scope
   cv::line(image, points2d[0], points2d[1], redx, 2);
                                             ^~~~
....../DLib/src/DVision/FSolver.cpp: In member function ‘cv::Mat DVision::FSolver::findFundamentalMat(const cv::Mat&, const cv::Mat&, double, int, std::vector<unsigned char>*, bool, double, int) const’:
....../DLib/src/DVision/FSolver.cpp:160:32: error: ‘CV_REDUCE_SUM’ was not declared in this scope
       cv::reduce(prod, dot, 0, CV_REDUCE_SUM); // dot is Nx1
                                ^~~~~~~~~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:224:45: note: suggested alternative: ‘rindex’
   cv::line(image, points2d[0], points2d[1], redx, 2);
                                             ^~~~
                                             rindex
....../DLib/src/DUtilsCV/Drawing.cpp:225:45: error: ‘greeny’ was not declared in this scope
   cv::line(image, points2d[0], points2d[2], greeny, 2);
                                             ^~~~~~
....../DLib/src/DUtilsCV/Drawing.cpp:225:45: note: suggested alternative: ‘getenv’
   cv::line(image, points2d[0], points2d[2], greeny, 2);
                                             ^~~~~~
                                             getenv
....../DLib/src/DUtilsCV/Drawing.cpp:226:45: error: ‘bluez’ was not declared in this scope
   cv::line(image, points2d[0], points2d[3], bluez, 2);
                                             ^~~~~
....../DLib/src/DUtilsCV/GUI.cpp:287:23: error: ‘CV_EVENT_MOUSEMOVE’ was not declared in this scope
   m_valid_events[9] = CV_EVENT_MOUSEMOVE;
                       ^~~~~~~~~~~~~~~~~~
CMakeFiles/DLib.dir/build.make:247: recipe for target 'CMakeFiles/DLib.dir/src/DUtilsCV/GUI.cpp.o' failed
make[2]: *** [CMakeFiles/DLib.dir/src/DUtilsCV/GUI.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
CMakeFiles/DLib.dir/build.make:195: recipe for target 'CMakeFiles/DLib.dir/src/DUtilsCV/Drawing.cpp.o' failed
make[2]: *** [CMakeFiles/DLib.dir/src/DUtilsCV/Drawing.cpp.o] Error 1
CMakeFiles/DLib.dir/build.make:78: recipe for target 'CMakeFiles/DLib.dir/src/DVision/FSolver.cpp.o' failed
make[2]: *** [CMakeFiles/DLib.dir/src/DVision/FSolver.cpp.o] Error 1
make[2]: Leaving directory '....../DLib/build'
CMakeFiles/Makefile2:78: recipe for target 'CMakeFiles/DLib.dir/all' failed
make[1]: *** [CMakeFiles/DLib.dir/all] Error 2
make[1]: Leaving directory '....../DLib/build'
Makefile:132: recipe for target 'all' failed
make: *** [all] Error 2

Can DLIB find_min_global be initialized with a starting x0?

Hello,

Just wondering if I can give dlib.find_min_global a list or array of starting points to try before it starts.

Thank you

Change in code for windows compilation

Error in compilation in MSVC 15

Issue:

#ifdef _MSC_VER
// Microsoft Visual Studio does not ship stdint.h
typedef __int32 int32_t;
typedef unsigned __int32 uint32_t;
typedef __int64 int64_t;
typedef unsigned __int32 uint64_t;
#else
#include <stdint.h>
#endif

Suggested Resolution:

#include<stdint.h>

as uint64_t and uint32_t are defined in MSVC 2015.

Build Error

Scanning dependencies of target DLib
[  3%] Building CXX object CMakeFiles/DLib.dir/src/DVision/BRIEF.cpp.o
/home/acxz/vcs/git/github/dorian3d/DLib/src/DVision/BRIEF.cpp: In member function ‘void DVision::BRIEF::compute(const cv::Mat&, const std::vector<cv::KeyPoint>&, std::vector<boost::dynamic_bitset<> >&, bool) const’:
/home/acxz/vcs/git/github/dorian3d/DLib/src/DVision/BRIEF.cpp:55:32: error: ‘CV_RGB2GRAY’ was not declared in this scope
   55 |       cv::cvtColor(image, aux, CV_RGB2GRAY);
      |                                ^~~~~~~~~~~
make[2]: *** [CMakeFiles/DLib.dir/build.make:63: CMakeFiles/DLib.dir/src/DVision/BRIEF.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:76: CMakeFiles/DLib.dir/all] Error 2
make: *** [Makefile:130: all] Error 2

Steps to Reproduce:
Clone
mkdir build && cd build && cmake ..
make
-> Above Error

System:
OS: ArchLinux
master branch as of posting

Change in Config.cmake

Error while compiling with MSVC 2015

Issue:

FIND_LIBRARY(DLib_LIBRARY DLib
PATHS C:/Program Files (x86)/DLib/lib
)
LIST(APPEND DLib_INCLUDE_DIR
${DLib_INCLUDE_DIR}/../ ${DLib_INCLUDE_DIR}/../DUtils
${DLib_INCLUDE_DIR}/../DUtilsCV ${DLib_INCLUDE_DIR}/../DVision)

Error Msg:

DLib_LIBRARY not found
DLib_INCLUDE_DIR not found

Suggested Resolution:
FIND_LIBRARY(DLib_LIBRARY
NAMES DLib
PATHS "C:/Program Files (x86)/DLib/lib"
)
LIST(APPEND DLib_INCLUDE_DIR
"${DLib_INCLUDE_DIR}/../" "${DLib_INCLUDE_DIR}/../DUtils"
"${DLib_INCLUDE_DIR}/../DUtilsCV" "${DLib_INCLUDE_DIR}/../DVision")

cv::KeyPoint is not a member of 'cv'

My system is Ubuntu 14.04 64bit. My OpenCV version is 2.4.9. Initially, the error is something like "in file BRIEF.cpp: No such file opencv2/imgproc.hpp", and I modify the include to "opencv2/imgproc/imgproc.hpp", which is the real condition in my system. Then, comes the error as "cv::KeyPoint is not a member of 'cv'". Could anybody tells me why this has happened?

can't find Qt5

Installed Qt5 many times still can't find Qt5
/usr/bin/ld: cannot find -lQt5::Core
/usr/bin/ld: cannot find -lQt5::Gui
/usr/bin/ld: cannot find -lQt5::Widgets
/usr/bin/ld: cannot find -lQt5::Test
/usr/bin/ld: cannot find -lQt5::Concurrent
/usr/bin/ld: cannot find -lQt5::OpenGL

DLib conflicting with dlib - 2 different packages...

Hi, is there any relationship between this DLib and standard dlib library? https://github.com/davisking/dlib

It is causing confusion to be honest and also requires more (little ..) work to maintain them in Gentoo tree system...

Ladislav

legacy.hpp no such file

I am compiling DLib with opencv 2.4.12 on Ubuntu 14.04, failed with this cmake error:

[  6%] Building CXX object CMakeFiles/DLib.dir/src/DVision/FSolver.cpp.o
In file included from /home/hou/slam/dlib/include/DUtilsCV/DUtilsCV.h:47:0,
                 from /home/hou/slam/dlib/src/DVision/FSolver.cpp:17:
/home/hou/slam/dlib/include/DUtilsCV/IO.h:17:37: fatal error: opencv2/legacy/legacy.hpp: No such file or directory
 #include <opencv2/legacy/legacy.hpp>

I am not familiar with these compiling things, could anyone be help?

Issue with OpenCV

Hi. When I try to build this project I get the following compilation error:

make
[ 3%] Building CXX object CMakeFiles/DLib.dir/src/DVision/BRIEF.cpp.o
In file included from /home/nlw/src/DLib/src/DVision/BRIEF.cpp:13:0:
/home/nlw/src/DLib/include/DVision/BRIEF.h:99:33: error: ‘cv’ does not name a type
inline void operator() (const cv::Mat &image,
^

It looks like cmake is picking an old version of the opencv library, where the cv namespace didn't exist... Do you have any idea how to deal with this by any chance?