How to measure the amount of BLUR in a video?
in [Matlab]
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From: vijaya on 2 May 2010 13:29 buddies, In a collection of blurred videos, i suppose to measure the amount of blur in each videos so that to inform which one is affected with more blur artifact.. lik the video 1 affected with avg 60% of blur and 2nd with avg 10%...How can i measure it?.. Is it right to measure using contrast level of video?.. Do u suggest any other method?.. whatever the method briely explain me with code?.. Help me to enhance my interest in video analysis.. ThankS
From: ImageAnalyst on 2 May 2010 13:38 On May 2, 1:29 pm, "vijaya " <vijay.uma...(a)gmail.com> wrote: > buddies, > In a collection of blurred videos, i suppose to measure the amount of blur in each videos so that to inform which one is affected with more blur artifact.. lik the video 1 affected with avg 60% of blur and 2nd with avg 10%....How can i measure it?.. Is it right to measure using contrast level of video?.. Do u suggest any other method?.. whatever the method briely explain me with code?.. > Help me to enhance my interest in video analysis.. > > ThankS ================================================= vijaya ; You can't do it, unless you know the ground truth or make some assumptions about it.. What if you have a very smooth image, say an in-focus image of a painted wall. That may be more in focus, and have a narrower histogram, than a blurred version of a crowd of people. So if you have a smooth scene, how can you tell if it's blurry or just naturally smooth? You can't. Maybe you could make some assumptions on what the ground truth is. But best is if you know what your in focus scene looks like.
From: Steven Lord on 2 May 2010 23:05
"vijaya " <vijay.umasun(a)gmail.com> wrote in message news:hrkcp0$sp5$1(a)fred.mathworks.com... > buddies, > In a collection of blurred videos, i suppose to measure the amount of blur > in each videos so that to inform which one is affected with more blur > artifact.. lik the video 1 affected with avg 60% of blur and 2nd with avg > 10%...How can i measure it?.. Is it right to measure using contrast > level of video?.. Do u suggest any other method?.. whatever the method > briely explain me with code?.. > Help me to enhance my interest in video analysis.. Ah, but what if there are multiple types of blur in your video? Do you want to know the amount of each type of blur separately, or just the total amount of blur? For example, here's one video with multiple types of blur: http://www.youtube.com/watch?v=U1Kjnxpy0GY -- Steve Lord slord(a)mathworks.com comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ |