Title :
A Pixel-Parallel Self-Similitude Processing for Multiple-Resolution Edge-Filtering Analog Image Sensors
Author :
Takahashi, Norihiro ; Fujita, Kazuhide ; Shibata, Tadashi
Author_Institution :
Dept. of Frontier Inf., Univ. of Tokyo, Kashiwa, Japan
Abstract :
A pixel-parallel self-similitude computation architecture has been developed for multiple-resolution directional edge filtering based on focal-plane image processing. The self-similitude organization has enabled pixel-by-pixel multiple-resolution image filtering with minimal complexity in interconnects. As a result, it has become possible to accomplish any (1/2)n-resolution directional edge filtering in (n+2) steps. An analog edge-filtering chip implemented using a switched floating-gate MOS (neuMOS) technology that is capable of performing four-directional edge filtering at full, half, and quarter resolutions was designed and fabricated in a 0.35-mum 3-metal CMOS technology. The concept has been experimentally verified using the fabricated chip, and the four-directional edge filtering at full, half, and quarter resolutions was demonstrated by measurement.
Keywords :
CMOS image sensors; analogue integrated circuits; image resolution; integrated circuit interconnections; CMOS technology; analog image sensors; focal-plane image processing; image resolutions; interconnects; multiple-resolution edge-filtering; pixel-by-pixel multiple-resolution image filtering; pixel-parallel self-similitude processing; size 0.35 mum; switched floating-gate MOS technology; Analog circuit; directional edge filtering; image filtering; image recognition; multiple resolution;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2009.2015598
