colordistance

Colorspace distance

d = colordistance(im, rg) is the Euclidean distance on the rg-chromaticity plane from coordinate rg=[r,g] to every pixel in the color image im. d is an image with the same dimensions as im and the value of each pixel is the color space distance of the corresponding pixel in im.

Notes

• The output image could be thresholded to determine color similarity.
• Note that Euclidean distance in the rg-chromaticity space does not correspond well with human perception of color differences. Perceptually uniform spaces such as Lab remedy this problem.

See also

colorspace

Machine Vision Toolbox for MATLAB © 1990-2014 Peter Corke.