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MATLAB for CUDA Programmers

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MATLAB for CUDA Programmers

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02 Oct 2012 (Updated )

This is the code used during the MATLAB for CUDA Programmers webinar

whitebalance(imageData)
function imageData = whitebalance(imageData)
% WHITEBALANCE forces the average image colour to be gray.
% Copyright 2013 The MathWorks, Inc.

% Find the average values for each channel.
avg_rgb = mean(mean(imageData));
 
% Find the average gray value and compute the scaling factor.
factors = max(mean(avg_rgb), 128)./avg_rgb;

% Adjust the image to the new gray value.
imageData(:,:,1) = uint8(imageData(:,:,1)*factors(1));
imageData(:,:,2) = uint8(imageData(:,:,2)*factors(2));
imageData(:,:,3) = uint8(imageData(:,:,3)*factors(3));

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