A dual pixel-type array for imaging and motion centroid localization

Author

Clapp, Matthew A. ; Etienne-Cummings, Ralph

Author_Institution

Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA

Volume

2

Issue

6

fYear

2002

fDate

12/1/2002 12:00:00 AM

Firstpage

529

Lastpage

548

Abstract

An imager chip has been designed, fabricated, and tested having two unique pixel types interleaved on the same array. The dual-pixel design enables optimization for two separate tasks. One type of pixel is an active pixel sensor (APS), which is used to produce a low-noise image. The other type is a custom-designed pixel optimized for computing the centroid of a moving object in the scene. The APS array is 120 columns ×36 rows, with a pixel size of 14.7×14.7 μm. The centroid array has 60 columns and 36 rows, with a larger pixel size of 29.4×29.4 μm. The chip was fabricated using standard scalable rules on a 0.5 μm 1P3M CMOS process. APS images were taken at a frame rate of 30 fps-8300 fps and centroid data was taken at a rate of 180-3580 (x,y) coordinates per second. The chip consumed 2.6 mW.

Keywords

CMOS image sensors; computer vision; image processing equipment; intelligent sensors; motion estimation; optical tracking; robot vision; smart pixels; 0.5 micron; 1P3M CMOS process; 2.6 mW; APS array; CMOS imager chip; active pixel sensor; centroid array; custom-designed pixel; dual pixel-type array; focal-plane processing; image motion analysis; image processing; intelligent sensors; low-noise image; machine vision; motion centroid localization; robot vision; smart pixels; tracking; CMOS image sensors; CMOS process; Charge coupled devices; Circuits; Image quality; Image sensors; Intelligent sensors; Layout; Optical imaging; Smart pixels;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2002.806894

Filename

1178167