Image processing projects, such as video tracking or face recognition, require a camera. In the next image, you can see the official camera support for Raspberry Pi Zero W. The camera can be easily mounted at the side of the board using a cable, similar to the Raspberry Pi 3 Model B board.
The official camera support for Raspberry Pi Zero W
Depending on your distribution, you may need to enable the camera through the command line. More information on the usage of this module will be mentioned in the project chapters.