1. A method for obtaining a Video-Signal Camera Capture (VSCC), the method comprising: detecting a video-signal surface in a background scene captured by a camera-enabled (CEN) device; extracting a frame of a video signal from said detected video-signal surface; splitting a color image of said frame into at least two channels each having a respective threshold value; detecting at least one quadrangle in a first channel of said at least two channels; and providing respective coordinates for each detected quadrangle.