Method for quantization gray level pixel data with extended dist

Details Method for quantization gray level pixel data with extended dist Method for quantization gray level pixel data with extended dist

1993-12-15

1994-10-04

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358465, H04N 140

Patent

active

053531272

ABSTRACT:
A method and arrangement for quantization of the nth pixel in scan line l (i.e., pixel n,l), with error diffusion to a matrix including pixels at pixel locations corresponding to pixels {(n+1,l), (n-2,l+1), (n-1,l+1), (n,l+1)}. Distribution weighting may be in accordance with the scheme {(n+1,l)=0.5, (n-2,l+1)=0.125 (n-1,l+1)=0.125 (n,l+1)= 0.25 }. In another embodiment, distribution weighting may be in accordance with the scheme {(n+1,l)=0.5, (n-3,l+1)=0.0625, (n-2,l+1)=0.0625, (n-1,l+1)=0.125, (n,l+1)=0.25, }.

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