A self-calibrating single-chip CMOS camera with logarithmic response

被引:98
作者
Loose, M [1 ]
Meier, K
Schemmel, J
机构
[1] Rockwell Sci Ctr, Thousand Oaks, CA 91360 USA
[2] Univ Heidelberg, Kirchoff Inst Phys, Heidelberg, Germany
关键词
active pixel sensor; CMOS image sensor; fixed pattern noise correction; logarithmic response; single-chip camera;
D O I
10.1109/4.913736
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A high-dynamic-range CMOS image sensor consisting of nonintegrating, continuously working photoreceptors with logarithmic response is presented. The nonuniformity problem caused by the device-to-device variations is greatly reduced by an implemented analog self-calibration. After performing this calibration, the remaining fixed pattern noise amounts to 3.8% (RMS) of an intensity decade at a uniform illumination of 1 W/m(2). The sensor provides a resolution of 384 x 288 pixels and a dynamic range of 6 decades in the intensity region from 3 mW/m(2) to 3 kW/m(2). It contains all components required for operating as a camera-on-a-chip. The image data can be read out either via a single analog line (video standard) or via a digital interface after undergoing an analog-to-digital conversion on the chip, Additional features like automatic exposure control, averaging of adjacent pixels, and digital zoom have been implemented, making the sensor suitable for a wide field of applications.
引用
收藏
页码:586 / 596
页数:11
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