Figure 7
(a) The original gray images measured by CS with wavelet sparsity basis. The measurement numbers of both conventional and K-cluster-valued CS over these images are M = 3.5S, where S is the number of compressible wavelet coefficients greater than threshold 20. (b) The reconstructed images using the conventional CoSaMP recovery method. (c) The images reconstructed by K-cluster-valued (wavelet coefficients) CoSaMP. Note that cluster number K was chosen to be 40 for all these images.