2010 • Conference Paper
A (256*256) pixel 76.7mW CMOS imager/ compressor based on real-time in-pixel compressive sensing
Authors:
Majidzadeh, Vahid,
Jacques, Laurent ,
Schmid, A.,
Vandergheynst, Pierre,
Leblebici, Yusuf
Published in:
2010 IEEE International Symposium on Circuits and Systems. ISCAS 2010
A CMOS imager is presented which has the ability to perform localized compressive sensing on-chip. In-pixel convolutions of the sensed image with measurement matrices are computed in real time, and a proposed programmable two-dimensional scrambling technique guarantees the randomness of the coefficients used in successive observation. A power and area-efficient implementation architecture is presented making use of a single ADC. A 256*256 imager has been developed as a test vehicle in a 0.18 mu m CIS technology. Using an 11-bit ADC, a SNR of 18.6dB with a compression factor of 3.3 is achieved after reconstruction. The total power consumption of the imager is simulated at 76.7mW from a 1.8V supply voltage.