Title :
A Low-Power Energy-Harvesting Logarithmic CMOS Image Sensor With Reconfigurable Resolution Using Two-Level Quantization Scheme
Author :
Law, M.K. ; Bermak, A. ; Shi, C.
Author_Institution :
Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, China
Abstract :
In this brief, a CMOS image sensor that exploits the possibility of reconfiguring pixel photodiodes for energy harvesting for wireless image sensor applications is proposed. Based on the logarithmic sensor architecture, each pixel photodiode of the proposed sensor array can be configured into either photosensing or energy-harvesting element to accomplish image-capturing or energy-harvesting purpose, respectively. An addressing scheme for reduced resolution readout and improved energy-harvesting efficiency, and a two-level quantization scheme for reduced readout dynamic power consumption are also proposed.
Keywords :
CMOS image sensors; energy harvesting; low-power electronics; photodiodes; CMOS image sensor; image-capturing; logarithmic sensor architecture; low-power energy-harvesting; photosensing; readout dynamic power consumption reduction; reconfiguring pixel photodiodes; resolution readout reduction; sensor array; two-level quantization scheme; wireless image sensor applications; Arrays; Image resolution; Image sensors; Photodiodes; Pixel; Quantization; Energy harvesting; low-power CMOS image sensor; reconfigurable resolution; two-level quantization;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2010.2104010
