Title :
Low Power Programmable Current Mode Computational Imaging Sensor
Author :
Njuguna, Raphael ; Gruev, Viktor
Author_Institution :
Comput. Sci. & Eng. Dept., Washington Univ. in St. Louis, St. Louis, MO, USA
fDate :
4/1/2012 12:00:00 AM
Abstract :
A linear current mode computational image sensor is presented in this paper. The sensor monolithically combines current mode imaging elements with current mode digitally programmable analog computational circuitry at the focal plane. The pixel is based on a switchless paradigm and allows for reduced spatial and temporal noise imaging. The imaging array is composed of 128-by-109 pixels. The image sensor provides a noise-corrected image in conjunction with a convolved image in parallel at 50 fps and 50 mW. The maximum measured SNR is 44 dB, maximum FPN of saturated value (after DDS) is 0.22%, and DR is 55 dB.
Keywords :
CMOS analogue integrated circuits; CMOS image sensors; focal planes; image denoising; low-power electronics; programmable circuits; sensor arrays; convolved image; current mode digitally programmable analog computational circuit; current mode imaging element; focal plane; imaging array; low power programmable current mode computational imaging sensor; noise figure 44 dB; noise-corrected image; power 50 mW; spatial noise imaging; switchless paradigm; temporal noise imaging; Arrays; Image processing; Imaging; Kernel; Photodiodes; Pixel; Transistors; Analog computation; CMOS image sensors; current mode; linear response; low power sensors;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2011.2158579
