Re: Color reduction
- Subject: Re: Color reduction
- From: Ian Ollmann <email@hidden>
- Date: Fri, 11 Jan 2008 23:36:34 -0800
- Delivered-to: email@hidden
- Delivered-to: email@hidden
On Jan 11, 2008, at 8:57 PM, Scott Ribe wrote:
Any pointers to algorithms for reducing RGB888 images to 8-bit + clut?
Dunno, but if you have any flexibility here, JPEG compression will
probably buy you more memory savings and look better.
RGB -> YUV 411 2:1 space savings
DCT + Z ordering + quant 2-4:1 space savings
Huffman ~30% space savings
You don't have to do all of it of course. The Huffman doesn't buy you
that much and it is the most expensive part.
Ian
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