UM
A Low-Power Compression-Based CMOS Image Sensor with Microshift-Guided SAR ADC
Zhong X.2; Zhang B.2; Bermak A.1; Tsui C.-Y.2; Law M.-K.3
2018-10-01
Source PublicationIEEE Transactions on Circuits and Systems II: Express Briefs
ISSN15497747
Volume65Issue:10Pages:1350-1354
AbstractThis brief presents a low-power compression-based CMOS image sensor for wireless vision applications. The sensor implements low-bit-depth imaging with planned sensor distortion (PSD) to effectively compress both data bandwidth and processing power while maintaining high reconstruction image quality. Accordingly, a column-parallel microshift-guided successive-approximation-register (SAR) ADC is proposed to enable 3-bit PSD imaging based on a 3× 3 pattern. To support normal imaging with low area overhead, the circuit is reconfigurable as an 8-bit SAR/single-slope ADC. The data bandwidth is further compressed by a customized lossless encoder based on predictive coding and run length coding. A 256× 216 prototype imaging system composed of the compression-based image sensor and the lossless encoder is fabricated in a 0.18-μ m standard CMOS process. Measurement results show that the image sensor achieves 3 bit/pixel (bpp) with 34.9-dB reconstruction peak signal-to-noise ratio (PSNR) and 0.91 structural similarity index (SSIM). With 1/4 spatial downsampling and lossless encoding, 0.31 bpp is obtained with 29.2-dB PSNR and 0.83 SSIM. The sensor consumes 14.8 μ W (full resolution) and 4.3 μ W (downsampling) at 15 fps, achieving state-of-the-art FoMs of 17.8 and 5.2 pJ/pixel frame, respectively. Including the encoder, the overall system dissipates as low as 1.2 μ J making it an attractive solution for wireless sensor networks.
KeywordCMOS image sensor focal-plane compression low bit depth microshift planned sensor distortion (PSD) SAR ADC wireless sensor networks
DOI10.1109/TCSII.2018.2859047
URLView the original
Language英語
Fulltext Access
Citation statistics
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Hamad Bin Khalifa University, College of Science and Engineering
2.Hong Kong University of Science and Technology
3.Universidade de Macau
Recommended Citation
GB/T 7714
Zhong X.,Zhang B.,Bermak A.,et al. A Low-Power Compression-Based CMOS Image Sensor with Microshift-Guided SAR ADC[J]. IEEE Transactions on Circuits and Systems II: Express Briefs,2018,65(10):1350-1354.
APA Zhong X.,Zhang B.,Bermak A.,Tsui C.-Y.,&Law M.-K..(2018).A Low-Power Compression-Based CMOS Image Sensor with Microshift-Guided SAR ADC.IEEE Transactions on Circuits and Systems II: Express Briefs,65(10),1350-1354.
MLA Zhong X.,et al."A Low-Power Compression-Based CMOS Image Sensor with Microshift-Guided SAR ADC".IEEE Transactions on Circuits and Systems II: Express Briefs 65.10(2018):1350-1354.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhong X.]'s Articles
[Zhang B.]'s Articles
[Bermak A.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhong X.]'s Articles
[Zhang B.]'s Articles
[Bermak A.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhong X.]'s Articles
[Zhang B.]'s Articles
[Bermak A.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.