Fig. 2
From: Efficient cost aggregation for feature-vector-based wide-baseline stereo matching
An example showing the 3×3 support windows (w=1) of three consecutive pixels (x,y), (x+1,y) and (x+2,y) in the left image. These three support windows share a common column (colored with red). For a given support window in the left image, a series of d-shifted support windows in the right image are matched against. The counterparts of this red column in these d-shifted support windows occupy an identical region of pixels in the right image (shaded with gray)