HAI, i want to ask you please tell me the code of PSNR and MSE ,,,please help me

Question

ameena begam 2015-6-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/223317-hai-i-want-to-ask-you-please-tell-me-the-code-of-psnr-and-mse-please-help-me

关闭： MATLAB Answer Bot 2021-8-20

Please help me to solve this probleam

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

此问题已关闭。

Answer 1

Image Analyst 2015-6-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/223317-hai-i-want-to-ask-you-please-tell-me-the-code-of-psnr-and-mse-please-help-me#answer_182260

psnr() and immse() are in the Image Processing Toolbox. Do you have that?

Please explain the contradiction of "tell me the code" with "i know the code" - do you know and understand the code or not???

You have to know what the reference image is when you call these functions. If the image is identical to the reference image, the PSNR will be infinite and the MSE will be zero. Anything else and they are "differentiated".

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

Answer 2

Walter Roberson 2015-6-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/223317-hai-i-want-to-ask-you-please-tell-me-the-code-of-psnr-and-mse-please-help-me#answer_182314

PSNR and MSE can only detect that two images are different and can give a measure of how different they are.

Neither PSNR nor MSE can be used to tell you which of the two images is the "original" image.

Images that are compressed (or watermarked) tend to reduce the sharpness of their edges, if they had sharp edges to begin with. You can run an image sharpening routine and compare the results: the image for which sharpening makes least difference might be the original image.