how to save an double image with no changing in matlab?

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Jack Moriss 2016-7-9

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https://ww2.mathworks.cn/matlabcentral/answers/294591-how-to-save-an-double-image-with-no-changing-in-matlab

回答： Image Analyst 2016-7-9

hi i am working on image steganography project and my problem is that after hiding the message in image my image became double and when i save it as jpeg or png or tiff the data value changes. but when i save it by matlab tiff class i can extract the correct data but the image can not be seen on computer and no program can not open the image.is there a solution to this problem?

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Answer 1

Image Analyst 2016-7-9

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Cast it to uint8 before saving. Of course the data will change slightly. Whether your recovery algorithm can still get out a "good enough" image to interpret depends on how robust your recovery algorithm is.