1 Mat QImage2cvMat(QImage image)
2 {
3 cv::Mat mat;
4 switch(image.format())
5 {
6 case QImage::Format_ARGB32:
7 case QImage::Format_RGB32:
8 case QImage::Format_ARGB32_Premultiplied:
9 mat = cv::Mat(image.height(), image.width(), CV_8UC4, (void*)image.bits(), image.bytesPerLine());
10 break;
11 case QImage::Format_RGB888:
12 mat = cv::Mat(image.height(), image.width(), CV_8UC3, (void*)image.bits(), image.bytesPerLine());
13 cv::cvtColor(mat, mat, CV_BGR2RGB);
14 break;
15 case QImage::Format_Indexed8:
16 mat = cv::Mat(image.height(), image.width(), CV_8UC1, (void*)image.bits(), image.bytesPerLine());
17 break;
18 }
19 return mat;
20 }
1 QImage cvMat2QImage(const cv::Mat& mat)
2 {
3 // 8-bits unsigned, NO. OF CHANNELS = 1
4 if(mat.type() == CV_8UC1)
5 {
6 QImage image(mat.cols, mat.rows, QImage::Format_Indexed8);
7 // Set the color table (used to translate colour indexes to qRgb values)
8 image.setNumColors(256);
9 for(int i = 0; i < 256; i++)
10 {
11 image.setColor(i, qRgb(i, i, i));
12 }
13 // Copy input Mat
14 uchar *pSrc = mat.data;
15 for(int row = 0; row < mat.rows; row ++)
16 {
17 uchar *pDest = image.scanLine(row);
18 memcpy(pDest, pSrc, mat.cols);
19 pSrc += mat.step;
20 }
21 return image;
22 }
23 // 8-bits unsigned, NO. OF CHANNELS = 3
24 else if(mat.type() == CV_8UC3)
25 {
26 // Copy input Mat
27 const uchar *pSrc = (const uchar*)mat.data;
28 // Create QImage with same dimensions as input Mat
29 QImage image(pSrc, mat.cols, mat.rows, mat.step, QImage::Format_RGB888);
30 return image.rgbSwapped();
31 }
32 else if(mat.type() == CV_8UC4)
33 {
34 // Copy input Mat
35 const uchar *pSrc = (const uchar*)mat.data;
36 // Create QImage with same dimensions as input Mat
37 QImage image(pSrc, mat.cols, mat.rows, mat.step, QImage::Format_ARGB32);
38 return image.copy();
39 }
40 else
41 {
42 return QImage();
43 }
44 }