An Integrating Wide Dynamic-Range Image Sensor With a Logarithmic Response
An Integrating Wide Dynamic-Range Image Sensor With a Logarithmic Response
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DOI：
10.1109/ted.2009.2030614
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发表时间：
2009-09
影响因子：
3.1
通讯作者：
Hsiu-Yu Cheng;B. Choubey;S. Collins
中科院分区：
文献类型：
--
作者：
Hsiu-Yu Cheng;B. Choubey;S. Collins
描述了一种具有宽动态范围的集成CMOS图像传感器。这些像素的动态范围由用户定义的参考电压控制，该参考电压产生光电流相关的有效积分时间。这些像素的操作和获得良好控制的对数响应的方法都被描述。此外，描述的是校正这些像素中的固定图案噪声的两种替代方法的结果和来自各个像素的时间噪声的测量。这些结果表明，使用这些像素，可以匹配人类视觉系统的对比灵敏度。
An integrating CMOS image sensor with a wide dynamic range is described. The dynamic range of these pixels is controlled by a user-defined reference voltage that creates a photocurrent-dependent effective integration time. The operation of these pixels and a method of obtaining a well-controlled logarithmic response are both described. Furthermore, described are the results of two alternative methods of correcting the fixed pattern noise in these pixels and measurements of the temporal noise from individual pixels. These results show that with these pixels, it is possible to match the contrast sensitivity of the human visual system.