Covert to PNG or help me in reading a .gif image

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Sanjib 2022-3-6

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https://ww2.mathworks.cn/matlabcentral/answers/1664939-covert-to-png-or-help-me-in-reading-a-gif-image

评论： Sanjib 2022-3-6

I am working with Harvard Medical School MRI images , and these images are gray and in .gif format. When I use imread() and then imshow() functions, the images are not appearing as it is seen in the website or in desktop.

I asked the question they asked me to change the format to png. How can I change format to png in matlab as a gray image without losing information . I tried imread() and imwrite( gif), it can not solve the problem. I attached some images herewith.

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Answer 1

Image Analyst 2022-3-6

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https://ww2.mathworks.cn/matlabcentral/answers/1664939-covert-to-png-or-help-me-in-reading-a-gif-image#answer_911284

在 MATLAB Online 中打开

Use ind2rgb.

fileName = '1.gif';
[img, colorMap] = imread('1.gif');
rgbImage = ind2rgb(img, colorMap);
grayImage = rgb2gray(rgbImage);
imshow(grayImage, []);
% Save as png
fileName = strrep(fileName, '.gif', '.png');
imwrite(grayImage, fileName);
% Recall to test that it saved it correctly
figure
img = imread(fileName);
imshow(img, []);