Title :
A smart image sensor with novel implementation of quad-tree scan
Author :
Nezuka, T. ; Akita, J. ; Ikeda, M. ; Asada, Kunihiro
Author_Institution :
Dept. of Electron. Eng., Tokyo Univ., Japan
Abstract :
The quad-tree scan is realized by scanning nodes of a two-dimensional tree structure applied to the image. Only activated or effective pixels are scanned with quad-tree scan. We designed the image sensor using 0.6 μm CMOS 3-metal 2-poly-Si process. A 32×32 pixel array and a quad-tree scan controller are integrated on a 4.5 mm×4.5 mm die. Each pixel has an A/D conversion circuit and a motion detection circuit in a 96 μm×96 μm area. The quad-tree scan controller works at 10 Mcycles/s with 10 mW power dissipation
Keywords :
CMOS image sensors; analogue-digital conversion; image scanners; intelligent sensors; 0.6 micron; 10 mW; 1024 pixel; 32 pixel; 4.5 mm; 96 micron; A/D conversion circuit; CMOS; activated pixels; effective pixels; motion detection circuit; power dissipation; quad-tree scan; smart image sensor; two-dimensional tree structure; CMOS image sensors; CMOS process; Circuits; Design engineering; Electronic mail; Image sensors; Intelligent sensors; Pixel; Shape; Tree data structures;
Conference_Titel :
ASICs, 2000. AP-ASIC 2000. Proceedings of the Second IEEE Asia Pacific Conference on
Conference_Location :
Cheju
Print_ISBN :
0-7803-6470-8
DOI :
10.1109/APASIC.2000.896927
