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On Wide Dynamic Range Tone Mapping CMOS Image Sensor

机译：在宽动态范围色调上映射CMOS图像传感器

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摘要

The dynamic range of a natural scene often covers over 6 decades of intensity from bright to dark areas. Typical image sensors, however, have limited ability to capture this dynamic range available in nature. Even after designing specific wide dynamic range (WDR) image sensors, displaying them on conventional media with limited ability requires computationally complex tone mapping. This paper proposed a novel CMOS pixel which can capture and perform tone mapping during data acquisition. The pixel requires a reference voltage to generate tone mapped response. A number of different reference signals are proposed and generated which can perform WDR operation. Nevertheless, fixed pattern noise (FPN) effects the performance of these pixel. A pixel model with simple parameter extraction procedure is described for a typical tone mapping operator. This model is then used to obtain a simple procedure for pixel calibration leading to reduced FPN. The new proposed pixel response is able to capture upto 6 decades of light intensity and reported FPN correction procedure produces 1% of FPN contrast error.
机译：自然场景的动态范围通常涵盖超过6数十年的强度，从明亮到黑暗区域。然而，典型的图像传感器具有有限的能力捕获本质上可用的这种动态范围。即使在设计特定的宽动态范围（WDR）图像传感器之后，在具有有限能力的传统介质上显示它们需要计算复杂的色调映射。本文提出了一种新型CMOS像素，其可以在数据采集期间捕获和执行色调映射。像素需要参考电压来生成音调映射响应。提出并生成了许多不同的参考信号，其可以执行WDR操作。然而，固定模式噪声（FPN）影响了这些像素的性能。具有简单参数提取过程的像素模型用于典型的音调映射操作员。然后使用该模型来获得引起FPN减少的像素校准的简单过程。新的提议像素响应能够捕获高达6数十年的光强度，并且报告的FPN校正过程产生1％的FPN对比度误差。

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