How to create a .mat file to store multiple images and its histograms.

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Revathi 2013-1-24

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评论： Fattah Tuhin 2015-2-23

Hi,

I'm new to matlab and would greatly appreciate if anyone could guide me about .MAT file. I'm doing a image retrieval system which requires a database of 1000 images. Currently, i have a .mat file which contains the training data for 100 images but i would like it to increase 1000 images. How do i edit the .mat file or how to do i go about creating a .MAT file which it can store 1000 images and its histograms. Your help is greatly appreciated. Thanks.

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回答（1 个）

Walter Roberson 2013-1-24

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https://ww2.mathworks.cn/matlabcentral/answers/59731-how-to-create-a-mat-file-to-store-multiple-images-and-its-histograms#answer_72205

在 MATLAB Online 中打开

For example,

for K = 1 : 1000
  filename = sprintf('image_%04d.tif', K);
  I = imread(filename);
  IGray = rgb2gray(I);
  H = hist(Igray(:), 32);  %32 bins in the histogram
  imgs(K).image = I;
  imgs(K).histogram = H;
end
save('ImageDatabase.mat', 'imgs');

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Revathi 2013-1-24

Hi, Thanks for the prompt reply. May i know, is this the specific image name (image_%04d.tif)? I'm actually working on a RGB and a HSV color model. How many bins should i declare for both? Thanks so much for your help.