A 148dB Focal-Plane Tone-Mapping QCIF Imager

被引：0
|
作者：
Vargas-Sierra, S. [1 ]
Linan-Cembrano, G. [1 ]
Rodriguez-Vazquez, A. [1 ]
机构：
[1] CSIC, Inst Microelect Sevilla IMSE CNM, Seville 41092, Spain
来源：
2012 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS 2012) | 2012年
关键词：
WIDE DYNAMIC-RANGE; SENSOR;
D O I：
暂无
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：
This paper presents a QCIF HDR imager where visual information is simultaneously captured and adaptively compressed by an in-pixel tone-mapping scheme [1]. The tone mapping curve (TMC) is calculated from the histogram of an auxiliary previous image, which serves as a probability indicator of the distribution of illuminations within the current frame. The chip maps 148dB scenes onto 7-bit/pixel coding, containing illuminations from 2.2mlux (SNR10) to 55.33klux -with extreme values captured at 8s and 2.34 mu s, respectively. Pixels use an Nwell-Psubstrate photodiode and autozeroing for establishing the reset voltage. Measured sensitivity is 5.79V/lux.s. Dark current effects in the final image are attenuated by an automatic programming of the DAC levels. The chip has been fabricated in the 0.35 mu m OPTO technology from AMS.
引用
收藏
页码：1616 / 1619
页数：4
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