Create a set of intensity ramps as test spatial pattern. img = imgRamp(imSize) Ramp patterns are useful test patterns (sceneWindow) for evaluating contouring caused by poor analog to digital conversion, and sometimes for evaluating problems with demosaic'ing routines. This routine creates a steep intensity ramp at the top row of the image, and a decreasing intensity ramp as we measure down the rows. Examples: figure; img = imgRamp(128); imagesc(img); colormap(gray); axis image mesh(img) img = imgRamp; imagesc(img); colormap(gray); axis image imagesc(img); colormap(gray(256)); truesize; Copyright ImagEval Consultants, LLC, 2005.