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I'm not 100% sure what you are asking but obviously all colour reduction algorithms attempt to minimising the difference between the 24bit source and 8bit result.<br />
<br />
The only question is what quantity they actualy strive to minimise.<br />
<br />
Generally it will be a 'sum of differences' or 'root of sum of differences squared' and this will be performed either in RGB or HSV colour space.<br />
<br />
In some algorithms the sum is performed on an individual pixel, in others its performed over a group of nearby pixels.<br />

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I'm not 100% sure what you are asking but obviously all colour reduction algorithms attempt to minimising the difference between the 24bit source and 8bit result.

The only question is what quantity they actualy strive to minimise.

Generally it will be a 'sum of differences' or 'root of sum of differences squared' and this will be performed either in RGB or HSV colour space.

In some algorithms the sum is performed on an individual pixel, in others its performed over a group of nearby pixels.


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Hi,<br />
<br />
I am looking to convert a 24 bit bitmap to 8 bit bitmap.<br />
Do you know a way to do that without dithering, other than comparing the rgb (finding the minimal sum of diferrences between the red blue and green)?
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Hi,

I am looking to convert a 24 bit bitmap to 8 bit bitmap.
Do you know a way to do that without dithering, other than comparing the rgb (finding the minimal sum of diferrences between the red blue and green)?

converting 24 bit bitmap into 8 bit bitmap

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