Rearrange colors in colormap
[Y,newmap] = cmpermute(X,map)
[Y,newmap] = cmpermute(X,map,index)
[Y,newmap] = cmpermute(X,map) randomly reorders the colors in map to produce a new colormap, newmap. The cmpermute function also modifies the values in X to maintain correspondence between the indices and the colormap, and returns the result in Y. The image Y and associated colormap, newmap, produce the same image as X and map.
The input image X can be of class uint8 or double. Y is returned as an array of the same class as X.
Load the clown data set to get image X and its associated colormap, map. Display the image.
load clown figure; image(X); colormap(map)
Randomly reorder the colormap to get the new colormap, newmap. Display image X with the new colormap.
[Y, newmap] = cmpermute(X,map); colormap(newmap)