Full Image Recover for Block-Based Compressive Sensing

TL;DR

This paper introduces a CNN-based method for block-based compressive sensing that reconstructs full images simultaneously, effectively eliminating block effects and outperforming existing methods by 1.8 dB.

Contribution

The novel framework reconstructs full images from block measurements, recovering destroyed structure information and removing block effects in compressive sensing.

Findings

No block effect in reconstructed images

Outperforms existing methods by 1.8 dB

Effective recovery of structure information

Abstract

Recent years, compressive sensing (CS) has improved greatly for the application of deep learning technology. For convenience, the input image is usually measured and reconstructed block by block. This usually causes block effect in reconstructed images. In this paper, we present a novel CNN-based network to solve this problem. In measurement part, the input image is adaptively measured block by block to acquire a group of measurements. While in reconstruction part, all the measurements from one image are used to reconstruct the full image at the same time. Different from previous method recovering block by block, the structure information destroyed in measurement part is recovered in our framework. Block effect is removed accordingly. We train the proposed framework by mean square error (MSE) loss function. Experiments show that there is no block effect at all in the proposed method. And our results outperform 1.8 dB compared with existing methods.