Archived posting to the Leica Users Group, 2002/02/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jim Brick wrote: > You must > have a sampling rate at least four times the data rate. Nice explanation, Here are some diagrams I use to explain it to myself: Twice the data rate is good enough for black & white. Example: Pixels: PIXELA--space--PIXELB--space Sample: 1 2 3 4 So if each pixel can differentiate shades of gray, resolving two bits requires four samples (twice the number of pixels). If it takes four pixels (instead of 1) for each color bit, then: space PIXEL2A space space space PIXEL2B space space Pixels: PIXEL1A space PIXEL3A space PIXEL1B space Pixel3B space space PIXEL4A space space space PIXEL4B space space Sample: 1 2 3 4 5 6 7 8 So for color, resolving two bits requires 8 samples (four times the number of pixels). Which, of course, is just what you said. - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html