Problem with converted TIFF image
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I converted a png to tiff unsigned int16. The image resulting is completely black.
This a apart of my code:
% Convert to unsigned 16-bit integer
img_uint16 = uint16(double(img) / double(intmax('uint16')) * 65535);
% Save the image as TIFF
tiffPath = fullfile(subfolderPath, [currentImage(1:end-4), '_converted.tif']);
imwrite(img_uint16, tiffPath);
采纳的回答
Image Analyst
2023-12-14
Try
img_uint16 = uint16(double(img) / double(max(img(:))) * 65535);
or
img_uint16 = uint16(mat2gray(img) * intmax('uint16'));
1 个评论
Neither of these will preserve the image contrast, and the second is a disallowed mixed-class operation and will throw an error.
A = uint8([32 224]); % not a full-range image
% contrast is improperly skewed toward white for all values
B = uint16(double(A) / double(max(A(:))) * 65535)
% even if you fixed the error, it would still change the contrast
C = uint16(mat2gray(A) * double(intmax('uint16')))
% this is just an error
D = uint16(mat2gray(A) * intmax('uint16'))
While it's unlikely that the input class is signed integer, if it were, the first example would also cause gross data truncation, whereas the second would just cause the same contrast alteration.
更多回答（1 个）
Walter Roberson
2023-12-14
移动：DGM
2024-5-12
1 个投票
Use im2uint16
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