High-sensitivity high-dynamic digital CMOS imager
High-sensitivity high-dynamic digital CMOS imager
复制标题
高灵敏度高动态数字CMOS成像仪
DOI：
10.1117/12.426992
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Ansorge
中科院分区：
文献类型：
--
作者：
Martin Waeny;S. Tanner;S. Lauxtermann;N. Blanc;M. Willemin;M. Rechsteiner;E. Doering;J. Grupp;P. Seitz;F. Pellandini;M. Ansorge
CMOS图像传感器在功耗、小型化、模数转换器的片上集成以及用于专用功能的信号处理方面提供超过标准和普遍存在的电荷耦合器件的若干优点。由于CMOS相机的读出噪声通常高于CCD相机，因此要求极限灵敏度的应用迄今为止无法使用CMOS相机。本文分析了主要的噪声源，提出了降低噪声的方案，并给出了在一台QCIF分辨率为144 × 176像素、动态范围超过120 dB的单片数码相机上的实验结果。
CMOS image sensors offer over the standard and ubiquitous charge-coupled devices several advantages, in terms of power consumption, miniaturization, on-chip integration of analog- to-digital converters and signal processing for dedicated functionality. Due to the typically higher readout noise of CMOS cameras compared to CCD cameras applications demanding ultimate sensitivity were so far not accessible to CMOS cameras. This paper present an analysis of major noise sources, concepts to reduce them, and results obtained ona single chip digital camera with a QCIF resolution of 144 by 176 pixels and a dynamic range in excess of 120 dB.