An introduction to color spaces

Posted Oct 14, 2016 21:08 UTC (Fri) by chirlu (guest, #89906)
In reply to: An introduction to color spaces by jhoblitt
Parent article: An introduction to color spaces

It's referring to the distinction between these two ranges:

> Normally, eight-bit R'G'B' color values use the full 0..255 range, but colors in the Y'CbCr encoding are compressed to fit in the narrower 16..235 range.

I suppose you could call it “quantization method” or “range” or something like that instead.

Generally, of course, quantization means mapping a, theoretically, continuous value to a finite number of bins (in this case, 256 or 220, respectively).

An introduction to color spaces

Posted Oct 20, 2016 10:03 UTC (Thu) by Wol (subscriber, #4433) [Link] (1 responses)

That's what annoys me about people using the phrase "a quantum leap" to describe a large change. It's actually the smallest possible change that makes a difference.

Think of a vibrating string on, say, a guitar. An open g-string will vibrate with the string length equal to half a wavelength. The next harmonic up - the closest possible mode - is the string is equal to the wavelength - a quantum leap. Then one-and-a-half wavelengths - the next quantum leap. Etc etc.

Cheers,
Wol

An introduction to color spaces

Posted Oct 20, 2016 15:37 UTC (Thu) by mjg59 (subscriber, #23239) [Link]

A quantum leap involves passing from one state to another without passing through any intermediate points, so it's a perfectly good description of sudden increases in knowledge or technical advancement.