Image denoising based on correlation of wavelet coefficients
Liang-shi CAI, Nanshan Zheng · Cehui kexue · 2012
An image denoising method based on the wavelet coefficients was proposed in the paper.According to exponent attenuation of the wavelet coefficients in image decomposition and the correlation analysis of coefficients at the same scale,each coefficient of wavelet component was set different threshold and different algorithms for the coefficients of low and high frequencies were adopted respectively.Finally,the denoised image was obtained by wavelet reconstruction.The results showed that the proposed method was more efficient compared with traditional approaches in terms of visual quality and PSNR(Peak Signal Noise Ratio).