Computer Aided Design : 14011


CAD / 14011	14010 \| 14012

Subject:	Re: Hangin' around
Newsgroups:	lugnet.cad
Date:	Tue, 15 Aug 2006 21:04:59 GMT
Viewed:	1635 times

Travis Cobbs wrote: > > One of the below images used color subsampling. The other didn't. > Can you tell which is which? (Note that I created PNG crops of the > original JPEG images.) > > http://www.halibut.com/~tcobbs/ldraw/private/m6459.png > http://www.halibut.com/~tcobbs/ldraw/private/m6459b.png Well, both of the pictures show the typical JPEG artifacts (especially b), which IMO are so detrimental for all pictures containing high frequencies (=sharp edges). PNG is lossless, and doesn't generate anything like that. I know what I would use... JPEG is (maybe?) good for continous color changes, ie photos. -- Anders Isaksson, Sweden BlockCAD: http://web.telia.com/~u16122508/proglego.htm Gallery: http://web.telia.com/~u16122508/gallery/index.htm

Message has 1 Reply:

		Re: Hangin' around
(...) I agree (mostly), which is why LDView doesn't support JPEG snapshots, even with color subsampling disabled. Implementing JPEG support would be fairly easy, but I've always felt that it wasn't appropriate. Having said that, I don't personally (...) (18 years ago, 16-Aug-06, to lugnet.cad)

Message is in Reply To:

		Re: Hangin' around
(...) In my experience JPEG versions of computer-generated pictures only really look good when you turn off color sub-sampling during the JPEG compression. Many (most?) programs that allow you to create JPEG images don't support this option. It also (...) (18 years ago, 15-Aug-06, to lugnet.cad, FTX)

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