Problem when using imwrite command
显示 更早的评论
Hi every one I have a problem when I use imwrite command, for example suppose that I have first.jpg image, when I want to write it into a new image, for example second.jpg, as follows:
A=imread('first.jpg');
Imwrite(A,'secod.jpg');
The values of the pixels in the second.jpg is not exactly same as the values of the pixels in the first.jpg What is the wrong?
Regards
采纳的回答
Walter Roberson
2016-6-25
0 个投票
What is wrong is that JPEG defaults to using lossy compression. If the compression level used for the file does not exactly match the default compression level used by imwrite() then you would get different results.
Moral of the story: never use regular JPEG for anything other than presentation purposes, where the human eye is the limitation; do not use regular JPEG for scientific analysis. Use a lossless format instead such as PNG or TIFF.
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Images 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
