Figure 1

(a) The original 96 × 128 binary image, (b) the reconstructed image using CS with the prior knowledge that only one cluster of nonzero intensity values exist, and (c) the reconstructed image without any prior knowledge. (d) The reconstruction results of 1-cluster-intensity-based CS, after aligning 96 × 128 pixels of the image to be a vector with 12,288 entries, and (e) the reconstructing results of conventional CS, after aligning 96×128 pixels of the image to be a vector with 12,288 entries. The sparsity S in this image is 1,592, and measurement number M here is 3S, which is smaller than 4S [4] required for the accurate recovery of image in conventional CS.