SpoutReceive & ofxOpencv

Hi, all
I’m new to OF try to use spout texture to blobtracking, but some weird things happended…
it turns strange glitch split images on top left & top right .

here’s my code:

            spoutReceiver.updateTexture();
	spoutReceiver.getTexture().readToPixels(pixels);
	pixels.resize(320, 240);
	image.setFromPixels(pixels);		
	colorImg.setFromPixels(pixels);
	grayImage = colorImg;
	blobTracker.update(grayImage, threshold,minArea,maxArea);

it’s something wrong here??

Thanks… ^^