Title :
Morton (Z) scan based real-time variable resolution CMOS image sensor
Author :
Artyomov, Evgeny ; Rivenson, Yair ; Levi, Guy ; Yadid-Pecht, Orly
Author_Institution :
VLSI Syst. Center, Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
Abstract :
An image sensor architecture with an alternative image scan method, based on Morton (Z) order, is presented. This scan, compared to the conventional row (raster) scan, enables faster and efficient mean (average) computation of square image blocks. Digital averaging is used and the pixel data is read out with either the original resolution, a 2×2 or a 4×4 block averaging. A test chip of 128×128 array has been implemented in 0.35 μm CMOS technology, has 15% fill factor, is operated by a 3.3V supply and dissipates 30mW at video rate.
Keywords :
CMOS image sensors; image resolution; real-time systems; video signal processing; 0.35 micron; 3.3 V; 30 mW; Morton (Z) order; digital averaging; image sensor architecture; real-time image sensor; scan based image sensor; square image blocks; variable resolution image sensor; video rate; CMOS image sensors; CMOS technology; Capacitors; Computer architecture; Image resolution; Image sensors; Pixel; Sensor arrays; Signal resolution; Spatial resolution;
Conference_Titel :
Electronics, Circuits and Systems, 2004. ICECS 2004. Proceedings of the 2004 11th IEEE International Conference on
Print_ISBN :
0-7803-8715-5
DOI :
10.1109/ICECS.2004.1399635
