# Image Sensors

CCD and CMOS are two types of image sensors commonly used in modern digital cameras. They both use arrays of silicon pixels to detect light.

### Charge-coupled device (CCD)

* commonly seen in professional photography and telescopes
* expensive
* mostly global shutter (all pixels exposed to light at the same time)
* less visual noise and distortion

### Complementary metal–oxide–semiconductor (CMOS)

* commonly seen in small-scale devices like mobile phone
* inexpensive
* mostly rolling shutter (pixels exposed to light line-by-line)
* noisy