www.gusucode.com > 有监督的 CNN 网络完成对MNIST 数字的识别 > 有监督的 CNN 网络完成对MNIST 数字的识别/CNN—卷积神经网络数字识别/preproc_image.m
function pi = preproc_image(id) %单个图像预处理 % ind = find(~isnan(id(:,:,1))); % Inorm = zeros(size(id(:,:,1))); % Inorm(ind) = 255; % Inorm = Inorm'; ind = find(isnan(id(:,:,1))); Inorm = id(:,:,1); Inorm(ind) = 1; Inorm = abs(id(:,:,1)-1)'; randd = zeros(32,32); randd(3:30,3:30)=Inorm; pi = reshape(mapstd(reshape(randd,1,[])),32,32); end