... reduces the low value and maintains the high value. The aim of algorithm is to reduce wavelet coefficients which are generated by noise and maintain coefficients generated by image. In the last few years, the grey relational theory has been successfully introduced to image processing, image...

... be given by: Equation 8 Then the simulation is: Equation 9 In fact, the original data sequence step ratio usually is not constant. So, constant step ratio instead of variation step ratio to simulate must exist error. Image denoising is an important and widely studied problem in image processing...