www.gusucode.com > demos工具箱matlab源码程序 > demos/hueSaturationValueMapper.m
function hueSaturationValueMapper(data, info, intermKVStore) % Map function for the Hue Saturation Value MapReduce example. % Copyright 1984-2015 The MathWorks, Inc. if ~ismatrix(data) hsv = rgb2hsv(data); % Extract Hue values h = hsv(:,:,1); % Extract Saturation values s = hsv(:,:,2); % Extract Brightness values v = hsv(:,:,3); % Find average of HSV values avgH = mean(h(:)); avgS = mean(s(:)); avgV = mean(v(:)); % Add intermediate key-value pairs add(intermKVStore, 'Average Hue', struct('Filename', info.Filename, 'Avg', avgH)); add(intermKVStore, 'Average Saturation', struct('Filename', info.Filename, 'Avg', avgS)); add(intermKVStore, 'Average Brightness', struct('Filename', info.Filename, 'Avg', avgV)); end end