Title :
A bump-circuit-based motion detector using projected-activity histograms
Author :
Umejima, M. ; Yamasaki, T. ; Shibata, T.
Author_Institution :
Dept. of Frontier Informatics, Tokyo Univ., Japan
Abstract :
An analog VLSI for real-time motion analysis has been developed using CMOS bump circuits for pixel-level activity detection and projected activity histograms for motion detection. The pixel-level time derivative operation is carried out on a video sequence of images by the bump circuit built in each pixel to generate so-called activity maps. The data in the activity map are then projected onto x- and y-axes, and motion analysis is conducted using the activity histograms produced by projection. Therefore, the core circuitries for motion analysis are laid out at the periphery of the image sensor array. The proposed hardware algorithm has been verified by computer simulation. A proof-of-concept chip was fabricated in a 0.35-μm CMOS double-poly triple-metal technology and the measurement results from the test chip are presented to demonstrate the operation.
Keywords :
CMOS analogue integrated circuits; VLSI; analogue processing circuits; image sensors; integrated circuit design; motion estimation; simulation; 0.35 micron; CMOS bump circuits; CMOS double-poly technology; CMOS triple-metal technology; activity map generation; analog VLSI; bump-circuit-based motion detector; computer simulation; core circuitry; hardware algorithm; image sensor array periphery; image video sequence; motion detection; pixel-level activity detection; pixel-level time derivative operation; projected activity histogram; proof-of-concept chip; real-time motion analysis; x-y axes projection; CMOS analog integrated circuits; CMOS technology; Detectors; Histograms; Motion analysis; Motion detection; Pixel; Sensor arrays; Very large scale integration; Video sequences;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1328303
