|
|
A one hour movie
A digital movie is a-lot-of-data.
An example of a one hour Full HD movie.
|
|
|
Bits and Combinations
What a bit is, counting bits and the power of combining bits
|
|
|
|
|
|
|
|
|
Compression basics
The search for repetitions and less important details.
|
|
|
What a camera can capture
A camera can only capture an image of reality, not reality itself, making the image quality lossy by definition. But camera's with RAW can capture the most information.
|
|
|
|
|
|
|
|
|
What the eye can sense
How many colors can your monitor show, and how many colors and details can your eyes distinguish?
|
|
|
Noise is no image
We should exlude noise!
|
|
|
|
|
|
|
|
|
Dither
The illusion of tones,
and the reduction of combinations.
|
|
|
Less Combinations
Eight bits have 256 combinations, but if you know that eight out of eight bits are zero, than there's just one combination possible: 00000000.
|
|
|
|
|
|
|
|
|
The Shortest Codes
If the goal is small files, then use the shortest codes.
|
|
|
Camera Motions
A hand held videocamera its digital images are all different, even without noise, because even the slightest change of camera position results in a different image on the image sensor.
|
|
|
|
|
|
|
Navigation: 
Image Compression Homepage
