ofXCv and ROI

extend
#1

Hi.

I am trying to extract a region of interest from an opencv 2 Mat

I first generate a new Mat from my kinect depth pixels.

Then i am defining a cv::rect from one of the found contours.
define a ROI-image and try to drawMat.

But the image is jumbled.
Am I doing something wrong in connections to width and height being flipped when working with Mat?

thx.

  
  
  
myGlobal->grayImageMat = Mat(myGlobal->kinect.height, myGlobal->kinect.width, CV_8UC1, myGlobal->kinect.getDepthPixels(), 0);  
  
  
if(myGlobal->contourFinder.size() > 0){  
			cv::Rect boundRect = myGlobal->contourFinder.getBoundingRect(0);  
			Mat matROI = myGlobal->grayImageMat(cv::Rect(boundRect.x,boundRect.y,boundRect.width,boundRect.height));  
  
			drawMat(matROI, boundRect.x,boundRect.y);  
		}
#2

ok got it finally.

  
  
if(bNewFrame) {  
		background.update(vidPlayer, thresholded);  
  
		thresholded.update();  
		  
		convertColor(vidPlayer, sourceMat, CV_RGB2GRAY);  
		  
		contourFinder.setThreshold(126);  
		contourFinder.findContours(sourceMat);  
		  
		  
		for(int i = 0; i < contourFinder.size(); i++) {  
			cv::Rect boundRect = contourFinder.getBoundingRect(i);  
			sourceMat(boundRect).copyTo(matROI);  
		}  
		  
	}
#3

here i copy a part of one video and past it into an other.

  
  
for(int i = 0; i < contourFinder.size(); i++) {  
		  
	  
		cv::Rect boundRect = contourFinder.getBoundingRect(i);  
		  
		//define which part of the live video we are interested in  
		sourceMat(boundRect).copyTo(matROI);  
		  
		//make a solid white image  
		whiteImg = Mat(vidPlayer.height,vidPlayer.width,CV_8UC1,cv::Scalar(255));  
		  
		//define in to which part we want to add things  
		Mat whiteImg_TargetROI = whiteImg(boundRect);  
		  
		//combine two source imaged in to a third, the third can be one of the source images   
		addWeighted(whiteImg_TargetROI, 0, matROI, 1, 0, whiteImg_TargetROI);  
  
		  
		drawMat(whiteImg, 0,0);  
		  
		drawMat(matROI, mouseX, mouseY);  
	}
#4

but a problem i am noticing is, when i now do any sort of calculations on the combined image, it still only considers the ROI and resulting points are also just within the ROI.

not sure how to reset ROI of the image.