59     virtual void write(Mat& gray, int row, int col, const uchar& val)  in write()
61         gray.at<uchar>(row, col) = val;  in write()
139         yuv.ptr<uchar>(row)[col] = val[0];  in write()
142             yuv.ptr<uchar>(h + row/4)[col/2 + ((row/2) % 2) * (yuv.cols/2)] = val[2];  in write()
143 …          yuv.ptr<uchar>(h + (row/2 + h/2)/2)[col/2 + ((row/2 + h/2) % 2) * (yuv.cols/2)] = val[1];  in write()
154         yuv.ptr<uchar>(row)[col] = val[0];  in write()
157             yuv.ptr<uchar>(h + row/4)[col/2 + ((row/2) % 2) * (yuv.cols/2)] = val[1];  in write()
158 …          yuv.ptr<uchar>(h + (row/2 + h/2)/2)[col/2 + ((row/2 + h/2) % 2) * (yuv.cols/2)] = val[2];  in write()
180         uchar y = yuv.ptr<uchar>(row)[col];  in read()
181         uchar u = yuv.ptr<uchar>(yuv.rows * 2 / 3 + row/2)[(col/2)*2 + 1];  in read()
182         uchar v = yuv.ptr<uchar>(yuv.rows * 2 / 3 + row/2)[(col/2)*2];  in read()
193         uchar y = yuv.ptr<uchar>(row)[col];  in read()
194         uchar u = yuv.ptr<uchar>(yuv.rows * 2 / 3 + row/2)[(col/2)*2];  in read()
195         uchar v = yuv.ptr<uchar>(yuv.rows * 2 / 3 + row/2)[(col/2)*2 + 1];  in read()
206         uchar y = yuv.ptr<uchar>(row)[col];  in read()
207         uchar u = yuv.ptr<uchar>(h + (row/2 + h/2)/2)[col/2 + ((row/2 + h/2) % 2) * (yuv.cols/2)];  in read()
208         uchar v = yuv.ptr<uchar>(h + row/4)[col/2 + ((row/2) % 2) * (yuv.cols/2)];  in read()
219         uchar y = yuv.ptr<uchar>(row)[col];  in read()
220         uchar u = yuv.ptr<uchar>(h + row/4)[col/2 + ((row/2) % 2) * (yuv.cols/2)];  in read()
221         uchar v = yuv.ptr<uchar>(h + (row/2 + h/2)/2)[col/2 + ((row/2 + h/2) % 2) * (yuv.cols/2)];  in read()
231         uchar y = yuv.ptr<Vec2b>(row)[col][1];  in read()
232         uchar u = yuv.ptr<Vec2b>(row)[(col/2)*2][0];  in read()
233         uchar v = yuv.ptr<Vec2b>(row)[(col/2)*2 + 1][0];  in read()
243         uchar y = yuv.ptr<Vec2b>(row)[col][0];  in read()
244         uchar u = yuv.ptr<Vec2b>(row)[(col/2)*2][1];  in read()
245         uchar v = yuv.ptr<Vec2b>(row)[(col/2)*2 + 1][1];  in read()
255         uchar y = yuv.ptr<Vec2b>(row)[col][0];  in read()
256         uchar u = yuv.ptr<Vec2b>(row)[(col/2)*2 + 1][1];  in read()
257         uchar v = yuv.ptr<Vec2b>(row)[(col/2)*2][1];  in read()
327         uchar r = saturate_cast<uchar>(1.164f * y + 1.596f * v);  in convert()
328         uchar g = saturate_cast<uchar>(1.164f * y - 0.813f * v - 0.391f * u);  in convert()
329         uchar b = saturate_cast<uchar>(1.164f * y + 2.018f * u);  in convert()
338     uchar convert(YUV yuv)  in convert()
353         uchar y = saturate_cast<uchar>((int)( 0.257f*r + 0.504f*g + 0.098f*b + 0.5f) + 16);  in convert()
354         uchar u = saturate_cast<uchar>((int)(-0.148f*r - 0.291f*g + 0.439f*b + 0.5f) + 128);  in convert()
355         uchar v = saturate_cast<uchar>((int)( 0.439f*r - 0.368f*g - 0.071f*b + 0.5f) + 128);  in convert()