现在消费市场上的数码相机包括手机上的相机其图像传感器 (image sensor) 几乎都是 CMOS (complementary metal–oxide–semiconductor) 类型。在数码相机的早期，曾经还有另外一种类型图像传感器：CCD (charge-coupled device)。这两种图像传感器的原理与区别 Wikipedia 有详细说明 (https://en.wikipedia.org/wiki/Image_sensor)。随着技术的发展，消费市场上的数码摄像产品最终被 CMOS 一统天下。
二十四年前，我曾经花重金买过一台 CCD 数码相机，当时也拍了不少照片，今天回头看，这款相机拍静物非常出色。但因为相机反应速度慢，用它拍运动图像就不行了。
二十四年前 CCD 数码相机拍摄的：
嚯嚯，
CMOS 与 CCD之争
在消费市场上 CCD 败北了。但是在研究领域、天文学方面，CCD 图像传感器仍然是主流。In research, CCD (Charge-Coupled Device) cameras are used for their high sensitivity, resolution, and dynamic range in applications like astronomy, microscopy, and spectroscopy. They are essential for capturing high-quality digital images by converting light into electrical charges, which are then processed to form a digital image, replacing film in many applications. While widely used, they are increasingly being replaced by newer CMOS sensors in some areas due to advancements in CMOS technology.