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Re: Clipart
Bob Haar (rhaar@ALBERT.CS.GMR.COM)
Tue, 7 Jun 1994 10:23:13 EDT
> From: Rick Clements <rickcl@POGO.WV.TEK.COM>
>
> Gary made several good points about graphics and archivers, but I will
> disagree with one point.
>
> From: Gary Johnson <garyjohn@SPK.HP.COM>
> }GIF appears to be the most universally used bitmapped image format.
>
> There are more programs to display GIF's on your CRT. But, I haven't
> seen any word processors or desktop publishing programs that handle them
> on the PC. (Most desk top programs will handle a couple Mac formats,
> but not GIF.) Come to think of it, I don't have any drawing programs that
> will handle them either. TIFF and PCX seam to be the most common. On
> the PC. I can use GIF's because I have a shareware program to convert
> it to a BMP. I can then load it into Windows Paint Brush and copy it
> into an other application.
Maybe in the MS-DOS world, but not under UNIX. I can incorporate
TIFF, GIF, encapsulated PostScript and Sun raster images in
documents.
>
> }[...] and GIF files are much smaller than either BMP or PCX.
>
> Very true. I don't know what type of compression that GIF's use, but
> TIFF's use a good run length encoding. GIF's and TIFF's are probably
> about the same size.
>
GIF also uses a run-length encoding. But GIF uses 8 bits per
pixel for color while TIFF is often 24 bits per pixel. This not
only means three times as much raw data, but reduces the likelyhood
of continuous runs of the same image value. So GIF's are often
quite a bit smaller than TIFF's.
Actually JPEG format offers even better compression, but at the
price of some loss of image quality. For synthetic images like
drawings, this is not a problem, but is more noticable for images
scanned from photographs that have large areas of gradual shading.
YIS,
Bob
Bob Haar
Chartered Organization Representative, Troop and Pack 188
BSA, Clinton Valley Council, Pontiac, Michigan, USA.
Chippewa Lodge #29, WWW
email: rhaar@gmr.com (InterNet)
rhaar@aol.com (America OnLine)
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