title: Kinect crop image
body: <p>I'm trying to crop a rectangular region of a video RGB. First i found the coordinates of head joint and with this coordinates i drew a rectangle over the RGB video. Now i want to show in another video just the image that is inside of the rentangle in the first image.  Any help would be great.</p>
  
  <p>video RGB is displayed in a "RGBvideo" Image Control.
  cropped image i want to display in a "faceImage" Image Control</p>
  
  <p>I've search online but couldn't find a solution to it. I am confuse. </p>
  
  <p>thank you so much</p>