Title :
Adaptive Multiple-Resolution CMOS Active Pixel Sensor
Author :
Artyomov, Evgeny ; Yadid-Pecht, Orly
Author_Institution :
Ben-Gurion Univ. of the Negev, Beer-Sheva
Abstract :
A smart image sensor with adaptive multiple resolution ability is presented. This sensor is based on the quadtree decomposition algorithm, which decomposes an image into square homogeneous regions. After the image is segmented, only the value of the block and its size are stored or transmitted. On-chip implementation can solve the information bottleneck problem by reducing the amount of data for transmission. Good compression results can be achieved for scenes with predominant and homogeneous backgrounds. The algorithm is implemented on chip in a mixed-signal column parallel architecture in 0.35-mum 4M2P n-well TSMC CMOS technology available through MOSIS. Typical power dissipation for the test chip with 32times32 pixels is 70 mW at VDD=3.3 V
Keywords :
CMOS image sensors; image segmentation; 0.35 micron; 1024 pixels; 3.3 V; 32 pixels; 70 mW; CMOS active pixel sensor; CMOS imager; adaptive image sensor; image decomposition; image segmentation; mixed-signal column; multiple-resolution image sensor; quadtree decomposition algorithm; smart image sensor; CMOS image sensors; CMOS technology; Image coding; Image resolution; Image segmentation; Image sensors; Intelligent sensors; Layout; Parallel architectures; Power dissipation; Active pixel sensor (APS); CMOS imagers; VLSI; compression; image sensor; multiple resolution; quadtree decomposition (QTD);
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2006.883161
