Please read this ExtremeTech tutorial on how photosensitive CMOS chips and CCD chips actually collect photons and create voltage differences with them.

There are a series of  11 pages; we're looking at the three below.

The camera on the Botball XBC uses a CMOS chip:

http://www.quasarelectronics.com/c3188a.htm

You should answer these questions (notes might help you on a quiz!). Email them to Mr. R and have a hard copy printout for class:

a) main advantages of CMOS over CCD
b) main disadvantages of CMOS over CCD & how this is compensated for in CMOS designs
c) how color is created from chip level greyscale imaging (what is a CFA and how does it work?).
d) what is "demosaicing"?
e) what is "resolution interpolation"?
f) what is an imaging "artifact"?
g) Identify 2 ways "wild electrons" can be corralled or compensated for in the CMOS hardware or image processing