介绍了数码相机的核心器件———CMOS图像传感器的特性参数和在数码相机设计过程中CMOS图像传感器的选择。选择CMOS图像传感器,不仅需要考虑包括传感器的尺寸、像素总数和有效像素数、最小照度、动态范围、灵敏度、分辨力、光电响应不均匀性以及光谱响应等在内的特性参数,而且还要考虑电源管理和功耗、模数转换位数、开发的简便性以及成本等因素。 This paper introduces the characteristic parameters of CMOS image sensor, the core of digital camera and the choice of CMOS image sensor in digital camera design process. Choosing a CMOS image sensor not only requires consideration of the characteristic parameters including the size of the sensor, the total number of pixels and the number of effective pixels, the minimum illuminance, the dynamic range, the sensitivity, the resolution, the non-uniformity of the photoelectric response and the spectral response, Power management and power consumption, analog-digital conversion bits, ease of development, and cost.