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From: Rainer Deyke (root_at_[hidden])
Date: 2001-11-15 15:23:33

----- Original Message -----
From: "Fernando Cacciola" <fcacciola_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Thursday, November 15, 2001 11:53 AM
Subject: RE: [boost] VIGRA - Image processing for boost

> ----- Original Message -----
> From: Peter Dimov <pdimov_at_[hidden]>
> To: <boost_at_[hidden]>
> Sent: Thursday, November 15, 2001 2:30 PM
> Subject: Re: [boost] VIGRA - Image processing for boost
> > From: "Ullrich Koethe" <u.koethe_at_[hidden]>
> > This is one of the rare cases where I'd recommend a policy-based design.
> The
> > type of an 'image element' is orthogonal to the storage policy.
> >
> I think that they are not *entirely* orthogonal.
> AFAIK, encoding schemes are different for color and bi-tonal (binary)
> images.
> Thus, the fixed distinction between color and binary images seems to be
> appropriate even if a policy-based encoding scheme is supported within
> kind of image.
> IOW, I don't think that a complete ortogonality is at all useful; that is,
> don't think that it would make any sense to use RLE with a color image.

Why not? When dealing with cartoon-style graphics, large areas of a single
color are common and can benefit from RLE. With less than 8 bits per pixel,
it might even sense to have packed color images.

Rainer Deyke (root_at_[hidden])
Shareware computer games           - 
"In ihren Reihen zu stehen heisst unter Feinden zu kaempfen" - Abigor

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