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How to estimate the noiselevel of an image?

asked 2012-08-30 07:56:56 -0500

501 Not Implemented gravatar image

updated 2012-08-30 09:51:34 -0500

sammy gravatar image

I'm looking for a method to measure the noise-level of an image.

The noise i want to measure created by cameras with high iso settings. I read about some methods which used Laplace, DCT or Sobel. But how can i use it to get a qualifier?

I know about methods like SNR. But this need a second image as reference. I have only one image.

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I do not know a straight answer but there are different types of noises in images. I guess you are looking for a solution which would be the "sum" of every types of noises?

Rui Marques gravatar imageRui Marques ( 2012-08-30 14:53:29 -0500 )edit

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answered 2012-09-02 07:31:37 -0500

Victor1234 gravatar image

I think method would be noise-kind dependend. Generally speaking your can try to remove noises, diff obtained image with original and measure it characteristic parameters.

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okay, thx. I will try a simple box filter for my denoised image. And estimate the noise level with the snr-method.

501 Not Implemented gravatar image501 Not Implemented ( 2012-09-03 07:53:41 -0500 )edit
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Asked: 2012-08-30 07:56:56 -0500

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Last updated: Sep 02 '12