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2003

A Mixed-Signal VLSI for Real-Time Generation of Edge-Based Image Vectors

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A Mixed-Signal VLSI for Real-Time Generation of Edge-Based Image Vectors
A mixed-signal image filtering VLSI has been developed aiming at real-time generation of edge-based image vectors for robust image recognition. A four-stage asynchronous median detection architecture based on analog digital mixed-signal circuits has been introduced to determine the threshold value of edge detection, the key processing parameter in vector generation. As a result, a fully seamless pipeline processing from threshold detection to edge feature map generation has been established. A prototype chip was designed in a 0.35-µm double-polysilicon three-metal-layer CMOS technology and the concept was verified by the fabricated chip. The chip generates a 64-dimension feature vector from a 64x64-pixel gray scale image every 80µsec. This is about 104 times faster than the software computation, making a real-time image recognition system feasible.
Masakazu Yagi, Hideo Yamasaki, Tadashi Shibata
Added 31 Oct 2010
Updated 31 Oct 2010
Type Conference
Year 2003
Where NIPS
Authors Masakazu Yagi, Hideo Yamasaki, Tadashi Shibata
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