How do camera’s capture images and store them? Also, what type of paper do you need to do pinhole camera photography?

Question: How do camera's capture images and store them? Also, what type of paper do you need to do pinhole camera photography?
- Keywords:
  camera,
  image,
  paper,
  photography,
  pinhole
Asked by jamesat79 to Steve, Colin on 21 Jun 2013.
- Steven Gardner answered on 21 Jun 2013:
  
  A digital camera works by splitting the image up into a big grid. Something inside the camera called a charged-coupled device (or CCD for short) then measures the intensity of the light in each small square (called a pixel) of the grid and gives it a number. This information is then stored as a large sequence of numbers so when your computer reads the information it rebuilds the image by putting the right colour into each pixel. More pixels means a better quality image (mostly!). You’ll often see cameras quoted with a certain ‘megapixel’ number. Mega just means million so a 5 megapixel camera takes images with 5 million pixels in them.
  
  As for the pinhole camera, I really don’t know but I’d guess some sort of card?

Question: How do camera's capture images and store them? Also, what type of paper do you need to do pinhole camera photography?