SENSORS
there are 2 main technologies for camera sensors, CCD and CMOS
flowchart TD A[SENSORS] B[CMOS] C[Cellular Phones\nHandheld Devices\nWebcams\nVideo-surveillance\nBarcode Scanners] D[CCD] E[Digital Photography\nTV Broadcasting\nHigh Performance Industrial Imaging\nScientific and Medical Imaging] A --> B & D B --> C D --> E
In short CMOS is for low quality mass production and CCD is for high end quality image processing.