What is the physical significance of SNR and PSNR with respect to image processing?
In image denoising which parameter is better to show the performance of the filter?
Dear Dr. Balodi
You may follow the given link, it may sort out the query
http://dsp.stackexchange.com/questions/11326/difference-between-snr-and-psnr
The PSNR is commonly used for the purpose of describing
denoised image quality. But the PSNR depends on the dynamic range and the MSE of the image. If two images with different dynamic ranges are corrupted with the same amount of noise, the resulting PSNR value will be different because of the difference in dynamic ranges. This is a drawback because this loss of image quality is not caused by some form of external degradation but by the model itself. Thus, it becomes difficult to refer to the quality of a denoised image without reference
to its dynamic range. (http://www.naun.org/main/NAUN/circuitssystemssignal/20-611.pdf)
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