A low-complexity image compression algorithm for Address-Event Representation (AER) PWM image sensors

Denis Guangyin Chen, Amine Bermak, Chi Ying Tsui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

In Pulse-Width Modulation (PWM) image sensors the incident light intensity is represented by the timing of pulses. Exceptionally high dynamic range (DR) and improved signal-to-noise-ratio (SNR) have been demonstrated for this class of image sensors. Unfortunately, their spatial resolution is limited by the need of an in-pixel memory to record the timing information. The AER protocol is an attractive method for removing this overhead, since pixel trigger events can be sent as address vectors, and in-pixel data memories are no longer required. Regrettably, the need to send address vectors can place an increased burden on the communication channel and will limit the array resolution, frame-rate, and image quality. In this paper, we present a low-complexity AER Block Compression (AERBC) algorithm which exploits the statistically ordered nature of AER pixel arrays. The address vector overhead can be dramatically reduced under this scheme. Only 0.0625 comparisons and 0.125 subtractions are performed for each pixel, and on average 30.82 dB PSNR can be achieved at 1.0 bit-per-pixel code rate. A general strategy is also developed here to optimize AERBC parameters so a balance between performance and hardware resources can be reached.

Original languageEnglish
Title of host publication2011 IEEE International Symposium of Circuits and Systems, ISCAS 2011
Pages2825-2828
Number of pages4
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event2011 IEEE International Symposium of Circuits and Systems, ISCAS 2011 - Rio de Janeiro, Brazil
Duration: 15 May 201118 May 2011

Other

Other2011 IEEE International Symposium of Circuits and Systems, ISCAS 2011
CountryBrazil
CityRio de Janeiro
Period15/5/1118/5/11

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Chen, D. G., Bermak, A., & Tsui, C. Y. (2011). A low-complexity image compression algorithm for Address-Event Representation (AER) PWM image sensors. In 2011 IEEE International Symposium of Circuits and Systems, ISCAS 2011 (pp. 2825-2828). [5938193] https://doi.org/10.1109/ISCAS.2011.5938193