Ximea MU9PC Color Camera And OpenCV to Capture a Frame

For capturing a frame from Ximea Color camera MU9PM with OpenCV, we need to do the followings:

Initializing camera parameters for capturing from Color Camera

these are some of the parameters related to capturing in Color. Other related parameters can be found at Ximea Documentation Page

  //at first need to open the device for capturing

int deviceIndex=0;

HANDLE cameraHandle;

  xiOpenDevice(deviceIndex, &cameraHandle);

// default image format RGB24

xiSetParamInt(cameraHandle, XI_PRM_IMAGE_DATA_FORMAT, XI_RGB24);

xiSetParamInt(cameraHandle, XI_PRM_AUTO_WB, 0);

xiSetParamFloat(cameraHandle, XI_PRM_GAMMAY, 1);

xiSetParamFloat(cameraHandle, XI_PRM_GAMMAC, 0);

And after that need starting the acquisition:

if (xiStartAcquisition(cameraHandle) != XI_OK) {

      printf("xiStartAcquisition Error");

      return false;

    }

Capturing the frame

At first we allocate memory for the captured image and then getting the buffer from the camera and copying it in the allocated place.

XI_IMG img;

memset(&img, 0, sizeof(img));

img.size = sizeof(XI_IMG);

//depth of color images is 3

 depth = 3;

#if CV_MAJOR_VERSION == 2

     capturedFrame = cvCreateImage(cvSize(img.width, img.height), IPL_DEPTH_8U,depth);

#elif CV_MAJOR_VERSION == 3

  IplImage * image = cvCreateImage(cvSize(img.width, img.height),

  IPL_DEPTH_8U, depth);

  capturedFrame = cvarrToMat(image);

#endif

Mat capturedFrame;

memcpy(capturedFrame.data, img.bp, img.width * img.height*depth);