syberarall's profile - activity

Hello,

can anyone tell me, what code inside cvtColor has to be used, when converting 12 bit packed BayerBG12Packed into RGB. The following code does not work:

cv::Mat Mat16Bit(SizeY, SizeX, CV_16UC1, ImageData);
cv::Mat Mat8Bit = Mat16Bit.clone();
Mat8Bit.convertTo(Mat8Bit, CV_8UC3, 0.0625);
cv::Mat MatRgb(SizeY, SizeX, CV_8UC3);
cv::cvtColor(Mat8Bit, MatRgb, CV_BayerBG2RGB);

BayerBG12 works fine, so maybe the image sizes do not match - any help is welcome.

Now I got the solution - the following code works fine:

 IplImage *pRgbImage;
  pRgbImage = cvCreateImage(cvSize(SizeX, SizeY), IPL_DEPTH_8U, 3);

  IplImage *pYuvImage;
  pYuvImage = cvCreateImage(cvSize(SizeX, SizeY), IPL_DEPTH_8U, 2);
  pYuvImage->imageData = (char*)buffer;

  cvCvtColor(pYuvImage, pRgbImage, CV_YUV2RGB);

  cvNamedWindow("MyImage");
  cvShowImage("MyImage", pRgbImage);
  cvWaitKey();
  cvDestroyWindow("MyImage");
  cvReleaseImage(&pRgbImage);

But I still have Problems converting BayerBG12:

 IplImage *pRgbImage;
  pRgbImage = cvCreateImage(cvSize(SizeX, SizeY), IPL_DEPTH_8U, 3);

  IplImage *pYuvImage;
  pBg12Image = cvCreateImage(cvSize(SizeX, SizeY), IPL_DEPTH_8U, 2);
  pBg12Image->imageData = (char*)buffer;

  cvCvtColor(pBg12Image, pRgbImage, CV_BayerBG2RGB);

  cvNamedWindow("MyImage");
  cvShowImage("MyImage", pRgbImage);
  cvWaitKey();
  cvDestroyWindow("MyImage");
  cvReleaseImage(&pRgbImage);

Any suggestions ?

Thanks for the quick Response. But also COLOR_YUV2RGB_Y422 (CV_YUV2RGB_Y422) makes no difference. I have really no idea any more how to solve this Problem, so any help is welcome.

Hello,

I Need to preview camera Images gathering YUV422 Format data into a buffer. The following code works fine, but only as gray image:

  IplImage *pYuvImage;
  pYuvImage = cvCreateImage(cvSize(SizeX, SizeY), IPL_DEPTH_16U, 1);
  pYuvImage->imageData = (char*)buffer;

  cvNamedWindow("MyImage");
  cvShowImage("MyImage", pYuvImage);
  cvWaitKey();
  cvDestroyWindow("MyImage");
  cvReleaseImage(&pYuvImage);

Now actually I need to have a color Image window, so I tried following:

  IplImage *pBgrImage;
  pBgrImage = cvCreateImage(cvSize(SizeX, SizeY), IPL_DEPTH_8U, 3);

  IplImage *pYuvImage;
  pYuvImage = cvCreateImage(cvSize(SizeX, SizeY), IPL_DEPTH_16U, 1);
  pYuvImage->imageData = (char*)buffer;

  cvCvtColor(pYuvImage, pBgrImage, CV_YUV2RGB);

  cvNamedWindow("MyImage");
  cvShowImage("MyImage", pYuvImage);
  cvWaitKey();
  cvDestroyWindow("MyImage");
  cvReleaseImage(&pYuvImage);

Now cvCvtColor fails with an exception accessing wrong Memory. What goes wrong ? Remember, gray works fine - any help is appreciated.

Regards, Jürgen