Re: How to compare two images

Posted by Xavier Colomé on Aug 06, 2015; 6:34pm
URL: http://imagej.273.s1.nabble.com/How-to-compare-two-images-tp5013922p5013936.html

Thank you for your answer.

I think that we can use Peak signal-to-noise ratio (PSNR) to get a PSNR
value (in dB) for each image. Higher value means best quality.

Has anyone done any test with PSNR?

Thank you and best regards.

2015-08-06 10:41 GMT+02:00 Herbie <[hidden email]>:

> Xavier,
>
> this is a highly interesting question that boils down to the question what
> sharpness really is. In some fields sharpness is a subjective entity that,
> as such can only be determined by psychophysical methods. Of course the
> main problem with this approach is, that sharpness will depend on the image
> content.
>
> If you think of sharpness as an objective measure then you are to define
> it mathematically. If you are able to give a mathematical definition of
> sharpness, it should be possible to help you further.
>
> Best
>
> Herbie
>
> :::::::::::::::::::::::::::::::::::::::::::
> Am 06.08.15 um 10:30 schrieb Xavier Colomé:
>
>> Hello, I'm wondering if is it possible to compare two images and get if
>> one
>> has better sharpness than the other.
>>
>> Would it be possible?
>>
>> Thank you and best regards
>>
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>> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>>
>>
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