What is the difference between the imaging process of a CCD camera and a CMOS camera?
The principle of photoelectric conversion of CCD and CMOS image sensors is the same. The main difference is that the signal readout process is different. Because CCD has only one (or a few) output nodes for unified readout, the signal output consistency is very good; In a CMOS chip, each pixel has its own signal amplifier, which performs charge-voltage conversion. The consistency of its signal output is poor. However, in order to read the entire image signal, the CCD requires a wider signal bandwidth of the output amplifier. In a CMOS chip, the bandwidth requirement of the amplifier in each pixel is lower, which greatly reduces the power consumption of the chip. This is the CMOS chip. The main reason for lower power consumption than CCD. Despite the reduced power consumption, the inconsistency of millions of amplifiers brings higher fixed noise, which in turn is an inherent disadvantage of CMOS over CCD.