IEICE Transactions on Electronics
Online ISSN : 1745-1353
Print ISSN : 0916-8524
Special Section on Solid-State Circuit Design — Architecture, Circuit, Device and Design Methodology
Approximate-DCT-Derived Measurement Matrices with Row-Operation-Based Measurement Compression and its VLSI Architecture for Compressed Sensing
Jianbin ZHOUDajiang ZHOUTakeshi YOSHIMURASatoshi GOTO
Author information
JOURNAL RESTRICTED ACCESS

2018 Volume E101.C Issue 4 Pages 263-272

Details
Abstract

Compressed Sensing based CMOS image sensor (CS-CIS) is a new generation of CMOS image sensor that significantly reduces the power consumption. For CS-CIS, the image quality and data volume of output are two important issues to concern. In this paper, we first proposed an algorithm to generate a series of deterministic and ternary matrices, which improves the image quality, reduces the data volume and are compatible with CS-CIS. Proposed matrices are derived from the approximate DCT and trimmed in 2D-zigzag order, thus preserving the energy compaction property as DCT does. Moreover, we proposed matrix row operations adaptive to the proposed matrix to further compress data (measurements) without any image quality loss. At last, a low-cost VLSI architecture of measurements compression with proposed matrix row operations is implemented. Experiment results show our proposed matrix significantly improve the coding efficiency by BD-PSNR increase of 4.2 dB, comparing with the random binary matrix used in the-state-of-art CS-CIS. The proposed matrix row operations for measurement compression further increases the coding efficiency by 0.24 dB BD-PSNR (4.8% BD-rate reduction). The VLSI architecture is only 4.3 K gates in area and 0.3 mW in power consumption.

Content from these authors
© 2018 The Institute of Electronics, Information and Communication Engineers
Previous article Next article
feedback
Top