OpenCV常用方法出处链接（持续更新）

1.计算矩阵差值的绝对值 cv::absdiff应用

CV_EXPORTS_W void absdiff(InputArray src1, InputArray src2, OutputArray dst);

2.利用阈值输出二值图像 cv::threshold应用

double threshold( InputArray src, OutputArray dst,
                               double thresh, double maxval, int type );

3.比较图像像素值 cv::compare应用

CV_EXPORTS_W void compare(InputArray src1, InputArray src2, OutputArray dst, int cmpop);

4.分割图像前景背景 cv::grabCut应用

CV_EXPORTS_W void grabCut( InputArray img, InputOutputArray mask, Rect rect,
                           InputOutputArray bgdModel, InputOutputArray fgdModel,
                           int iterCount, int mode = GC_EVAL );

5.识别图像中一定范围的像素输出二值图 cv::inRange应用

CV_EXPORTS_W void inRange(InputArray src, InputArray lowerb,
                          InputArray upperb, OutputArray dst);

6.计算直方图 cv::calcHist应用

CV_EXPORTS void calcHist( const Mat* images, int nimages,
                          const int* channels, InputArray mask,
                          OutputArray hist, int dims, const int* histSize,
                          const float** ranges, bool uniform = true, bool accumulate = false );

7.应用查找表 cv::LUT应用

CV_EXPORTS_W void LUT(InputArray src, InputArray lut, OutputArray dst);

8.反向投影直方图 cv::calcBackProject应用

CV_EXPORTS void calcBackProject( const Mat* images, int nimages,
                                 const int* channels, InputArray hist,
                                 OutputArray backProject, const float** ranges,
                                 double scale = 1, bool uniform = true );

9.均值平移算法 cv::meanShift应用

CV_EXPORTS_W int meanShift( InputArray probImage, 
                            CV_IN_OUT Rect& window,
                            TermCriteria criteria );

10.比较直方图 cv::compareHist应用

CV_EXPORTS_W double compareHist( InputArray H1, 
                                 InputArray H2, 
                                 int method );

11.转置和翻转图像 cv::transposecv::flip应用

CV_EXPORTS_W void transpose(InputArray src, OutputArray dst);

CV_EXPORTS_W void flip(InputArray src, OutputArray dst, int flipCode);

12.自适应阈值化 cv::adaptiveThreshold应用

CV_EXPORTS_W void adaptiveThreshold( InputArray src, OutputArray dst,
                                     double maxValue, int adaptiveMethod,
                                     int thresholdType, int blockSize, double C );

13.生成积分图像 cv::integral应用

CV_EXPORTS_W void integral( InputArray src, OutputArray sum, int sdepth = -1 );

14.腐蚀和膨胀图像 cv::erodecv::dilate应用

CV_EXPORTS_W void erode( InputArray src, OutputArray dst, InputArray kernel,
                         Point anchor = Point(-1,-1), int iterations = 1,
                         int borderType = BORDER_CONSTANT,
                         const Scalar& borderValue = morphologyDefaultBorderValue() );

CV_EXPORTS_W void dilate( InputArray src, OutputArray dst, InputArray kernel,
                          Point anchor = Point(-1,-1), int iterations = 1,
                          int borderType = BORDER_CONSTANT,
                          const Scalar& borderValue = morphologyDefaultBorderValue() );

15.开启和闭合图像 cv::morphologyEx应用

CV_EXPORTS_W void morphologyEx( InputArray src, OutputArray dst,
                                int op, InputArray kernel,
                                Point anchor = Point(-1,-1), int iterations = 1,
                                int borderType = BORDER_CONSTANT,
                                const Scalar& borderValue = morphologyDefaultBorderValue() );

16.分水岭函数 cv::watershed应用

CV_EXPORTS_W void watershed( InputArray image, InputOutputArray markers );

17.拷贝/变换图像 GpuMat::convertTo应用

void GpuMat::convertTo(OutputArray dst, int rtype, 
					   double alpha, double beta) const

18.块滤波器和高斯滤波器 cv::blurcv::GaussianBlur应用

CV_EXPORTS_W void blur( InputArray src, OutputArray dst,
                        Size ksize, Point anchor = Point(-1,-1),
                        int borderType = BORDER_DEFAULT );

CV_EXPORTS_W void GaussianBlur( InputArray src, OutputArray dst, Size ksize,
                                double sigmaX, double sigmaY = 0,
                                int borderType = BORDER_DEFAULT );

19.二维自定义内核滤波器 cv::filter2D应用

CV_EXPORTS_W void filter2D( InputArray src, OutputArray dst, int ddepth,
                            InputArray kernel, Point anchor = Point(-1,-1),
                            double delta = 0, int borderType = BORDER_DEFAULT );

20.图像缩减和放大 cv::pyrDowncv::pyrUpcv::resize应用

CV_EXPORTS_W void pyrDown( InputArray src, OutputArray dst,
                           const Size& dstsize = Size(), int borderType = BORDER_DEFAULT );

CV_EXPORTS_W void pyrUp( InputArray src, OutputArray dst,
                         const Size& dstsize = Size(), int borderType = BORDER_DEFAULT );

CV_EXPORTS_W void resize( InputArray src, OutputArray dst,
                          Size dsize, double fx = 0, double fy = 0,
                          int interpolation = INTER_LINEAR );

21.中值滤波器 cv::medianBlur应用

CV_EXPORTS_W void medianBlur( InputArray src, OutputArray dst, int ksize );