what is mean by estimating a decoded image

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hi friends I am working on a project in that project i want to compress the image in that i want to create two green sub images & one blue sub image & one red sub image.now by using one green sub image i want to encode it & then decode it & then estimate it so what is mean by stimating an decoded image any one can help me.

Posted 2-Nov-11 4:41am

maheshpardeshi

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RaisKazi 2-Nov-11 10:50am

I think that question goes to your senior, who has assigned you this Project task.

Sergey Alexandrovich Kryukov 2-Nov-11 12:11pm

Estimate what?!
--SA

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TRK3 · Accepted Answer · 2011-11-03T12:47:00

In the context of image compression, the term "estimate" most likely refers to estimating the error introduced by the compression/decompression process.

A fairly common measure of image reconstruction quality is "Peak Signal to Noise Ratio" or (PSNR).

Wikipedia gives a reasonable explanation: http://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio[^]

If you need more help than the Wikipedia description, try Googling "PSNR" or "PSNR estimation"