matlab - Matrix content is changed when saved as image -


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i did encryption technique encrypted image lena.jpg.i saved encrypted image.when reading same matrix decription process noticed change in values of matrix.image has lost of characteristics.when decrypted matrix (encrypted) without saving picture output perfect..but once saved loses quality...why happening...

i attaching decrypted image..you can see pixels missing clearly.. decrypted image

when "save picture" format using? lossy sounds need lossless format this.


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