Fig. 2From: Adaptive tight frame based multiplicative noise removalDenoised results for polluted “barbara” by adaptive wavelet tight frame and non-adaptive wavelet tight frame. a is the original image and b is the noisy image. c, d are respectively the recovered images by adaptive wavelet tight frame method and the corresponding non-adaptive one with\(8 \times 8\) Haar wavelet. e = a–c and f = a–d are respectively the difference imageBack to article page