A Method to Achieve High Dynamic Range in a CMOS Image Sensor Using Interleaved Row Readout
A Method to Achieve High Dynamic Range in a CMOS Image Sensor Using Interleaved Row Readout
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DOI：
10.1109/jsen.2022.3211152
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发表时间：
2022-11-15
影响因子：
4.3
通讯作者：
Jones, Hugh R. A.
中科院分区：
文献类型：
--
作者：
Wocial, Thomas;Stefanov, Konstantin D.;Jones, Hugh R. A.
我们提出了一种CMOS图像传感器的读出方案，可以用来实现任意高的动态范围（HDR）的原则。在高信号区域的线性满阱容量（LFWC）通过交错的逐行读出顺序从20到984 ke（-）扩展了50倍，而噪声基底在低信号区域保持不变，导致DR增加了34 dB。峰值信噪比（PSNR）以连续的方式从43 dB增加到60 dB。这是通过对多次读出的用户选择的行求和来实现的。与标准读出方案相比，当模板拟合投影图案时，质心不确定性降低。由于线性度和PSNR增加，示例应用旨在科学成像。
We present a readout scheme for CMOS image sensors that can be used to achieve arbitrarily high dynamic range (HDR) in principle. The linear full well capacity (LFWC) in high signal regions was extended 50 times from 20 to 984 ke(-) via an interlaced row-wise readout order, while the noise floor remained unchanged in low signal regions, resulting in a 34-dB increase in DR. The peak signal-to-noise ratio (PSNR) is increased in a continuous fashion from 43 to 60 dB. This was achieved by summing user-selected rows that were read out multiple times. Centroiding uncertainties were lowered when template-fitting a projected pattern, compared to the standard readout scheme. Example applications are aimed at scientific imaging due to the linearity and PSNR increase.