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CD ROM Paradise Collection 4
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CD ROM Paradise Collection 4 1995 Nov.iso
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pcx2ccs.zip
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PCXCCS.GXL
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REDUC.HLP
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1994-05-27
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There are 8 different algorithms that can be selected for $
adjusting the image to the new palette. These options are: $
$
Floyd Dither Algorithm (F) $
Stucki Dither Algorithm (S) $
Burkes Dither Algorithm (B) $
ReMap - No Dither (R) $
Magic Square Matrix (M) $
Dispersed Dot Matrix (D) $
Clustered Dot Matrix (C) $
$
When an image has the number of colors reduced, a brand new $
palette is created. This new palette is created by determining $
the most commonly used colors and the most unique colors in the $
existing palette. After creating the NEW palette, every single $
symbol is then examined to determine which color in the NEW $
palette is the BEST substitute for the color in the OLD palette. $
This is a simple re-map, without any dithering. Most of the time,$
the resulting image is so-so.In an attempt to make a "better" $
image there are 6 different dithering algorithms. The first 3 $
options are different mathematical filters. $
$
As the new color for each occurrence of each symbol is $
determine, an "error" is computed. This error indicated how far $
"off" the new RGB is from the old RGB. This error is than $
distributed, adding or subtracting a number to the R, G and B $
values of the surrounding pixels. Each filter uses a different $
calculation for this distribution. For more details about the $
math involved in each algorithm, see the manual section entitled $
DITHERING ALGORITHMS $
$
There are also 3 Matrix filters. These 3 matrixes provide a $
pattern for dithering. The Magic Square matrix is a pretty good $
matrix. The Dispersed Dot matrix uses a crosshatched pattern $
while Clustered-Dot uses a pattern similar to the pattern used by$
newspapers. All 3 were provided by the graphics library I use, $
and as such I don't have any way to provide any feedback while $
it's working. $