www.gusucode.com > graphics 案例源码程序 matlab代码 > graphics/EliminateDuplicateEntriesInColormapExample.m
%% Eliminate Duplicate Entries in Colormap % Use the |magic| function to define |X| as a 4-by-4 array that uses every % value in the range between 1 and 16. % Copyright 2015 The MathWorks, Inc. %% X = magic(4); %% % Use the |gray| function to create an eight-entry colormap. Then, % concatenate the two eight-entry colormaps to create a colormap with 16 % entries, |map|. In |map|, entries 9 through 16 are duplicates of % entries 1 through 8. map = [gray(8); gray(8)]; size(map) %% % Use |cmunique| to eliminate duplicate entries in the colormap. [Y, newmap] = cmunique(X, map); size(newmap) %% % |cmunique| adjusts the values in the original image |X| so that |Y| and % |newmap| produce the same image as |X| and |map|. figure image(X) colormap(map) title('X and map') figure image(Y) colormap(newmap) title('Y and newmap')