opencv.hpp文件

下面是opencv.hpp的源码：

#ifndef OPENCV_ALL_HPP
#define OPENCV_ALL_HPP

// File that defines what modules where included during the build of OpenCV
// These are purely the defines of the correct HAVE_OPENCV_modulename values
#include "opencv2/opencv_modules.hpp"

// Then the list of defines is checked to include the correct headers
// Core library is always included --> without no OpenCV functionality available
#include "opencv2/core.hpp"

// Then the optional modules are checked
#ifdef HAVE_OPENCV_CALIB3D
#include "opencv2/calib3d.hpp"
#endif
#ifdef HAVE_OPENCV_FEATURES2D
#include "opencv2/features2d.hpp"
#endif
#ifdef HAVE_OPENCV_FLANN
#include "opencv2/flann.hpp"
#endif
#ifdef HAVE_OPENCV_HIGHGUI
#include "opencv2/highgui.hpp"
#endif
#ifdef HAVE_OPENCV_IMGCODECS
#include "opencv2/imgcodecs.hpp"
#endif
#ifdef HAVE_OPENCV_IMGPROC
#include "opencv2/imgproc.hpp"
#endif
#ifdef HAVE_OPENCV_ML
#include "opencv2/ml.hpp"
#endif
#ifdef HAVE_OPENCV_OBJDETECT
#include "opencv2/objdetect.hpp"
#endif
#ifdef HAVE_OPENCV_PHOTO
#include "opencv2/photo.hpp"
#endif
#ifdef HAVE_OPENCV_SHAPE
#include "opencv2/shape.hpp"
#endif
#ifdef HAVE_OPENCV_STITCHING
#include "opencv2/stitching.hpp"
#endif
#ifdef HAVE_OPENCV_SUPERRES
#include "opencv2/superres.hpp"
#endif
#ifdef HAVE_OPENCV_VIDEO
#include "opencv2/video.hpp"
#endif
#ifdef HAVE_OPENCV_VIDEOIO
#include "opencv2/videoio.hpp"
#endif
#ifdef HAVE_OPENCV_VIDEOSTAB
#include "opencv2/videostab.hpp"
#endif
#ifdef HAVE_OPENCV_VIZ
#include "opencv2/viz.hpp"
#endif

// Finally CUDA specific entries are checked and added
#ifdef HAVE_OPENCV_CUDAARITHM
#include "opencv2/cudaarithm.hpp"
#endif
#ifdef HAVE_OPENCV_CUDABGSEGM
#include "opencv2/cudabgsegm.hpp"
#endif
#ifdef HAVE_OPENCV_CUDACODEC
#include "opencv2/cudacodec.hpp"
#endif
#ifdef HAVE_OPENCV_CUDAFEATURES2D
#include "opencv2/cudafeatures2d.hpp"
#endif
#ifdef HAVE_OPENCV_CUDAFILTERS
#include "opencv2/cudafilters.hpp"
#endif
#ifdef HAVE_OPENCV_CUDAIMGPROC
#include "opencv2/cudaimgproc.hpp"
#endif
#ifdef HAVE_OPENCV_CUDAOBJDETECT
#include "opencv2/cudaobjdetect.hpp"
#endif
#ifdef HAVE_OPENCV_CUDAOPTFLOW
#include "opencv2/cudaoptflow.hpp"
#endif
#ifdef HAVE_OPENCV_CUDASTEREO
#include "opencv2/cudastereo.hpp"
#endif
#ifdef HAVE_OPENCV_CUDAWARPING
#include "opencv2/cudawarping.hpp"
#endif

#endif

在该头文件中已经包含了OpenCV中各个模块的头文件，换句话说我们在一般情况下，只需要引用：

#include 

便不需要再引用诸如：

#include 
#include 

因此可以在很大程度上简化代码。