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- Path: pravda.aa.msen.com!not-for-mail
- From: crandall@mail.msen.com (Chad Randall)
- Newsgroups: comp.sys.amiga.graphics
- Subject: Re: Scale'ing of JPEGS
- Date: 3 Jan 1996 13:10:30 GMT
- Organization: Msen, Inc. -- Ann Arbor, MI.
- Message-ID: <4cdv86$r96@pravda.aa.msen.com>
- References: <DKH54v.K16@gremlin.nrtc.northrop.com>
- NNTP-Posting-Host: conch.aa.msen.com
- X-Newsreader: TIN [UNIX 1.3 950824BETA PL0]
-
- mfrena@world.nad.northrop.com wrote:
- : I've got a couple of huge jpeg pictures that I'd like to scale down in
- : size. From about 1620x1290 to 1024x768. When I try to use Adpro with
- : an A3000 with 14 Megs of ram I get a requestor asking for 14 megs of
- : continous ram and one for 20 megs of ram. Since I don't have this much
- : ram I cannot do anything with these pictures.
- :
- : My question is, is there any other programs available for the Amiga via
- : share/freeware that I can use to scale down these pictures? Or maybe
- : some utility that I can use for this purpose?
- :
- : Any help would be appreciated.
- :
-
- Check out the Netpbm archives on Aminet. The gfx processing programs
- always save to disk, so the image size is only limited by your available
- HD space.
-
- pnmbin.lha gfx/pbm 622K 90+Netpbm 01mar94 - PNM binaries
- ppmbin1.lha gfx/pbm 643K 90+Netpbm 01mar94 - PPM binaries #1
- ppmbin2.lha gfx/pbm 239K 90+Netpbm 01mar94 - PPM binaries #2
- pgmbin.lha gfx/pbm 278K 90+Netpbm 01mar94 - PGM binaries
- ilbmtoppm.lha gfx/pbm 111K 32+Ilbmtoppm/ppmtoilbm update
- ppm2AGA16.lha gfx/pbm 309K 43+High quality ppm/JPEG to AGA converter
- manuals.lha gfx/pbm 141K 90+Netpbm 01mar94 - formatted manuals
- mergedbin.lha gfx/pbm 382K 90+Netpbm 01mar94 - merged binaries
-
-
- After installing all/some of these files, do the following:
-
- djpeg filename.jpg >filename.ppm
- pnmscale -xscale .50 -yscale .50 filename.ppm >filename_scale.ppm
- cjpeg -quality 80 -optimize filename_scale.ppm >filename_scale.jpg
-
- This might all look complicated, but after doing a few, it becomes
- easier to think about it.
-
- Even with ADPro and 18 megs RAM, I still prefer to use the netpbm
- programs 90% of the time to convert or scale images.
-
-
- And best of all, it's all FREE!
-
-
- Chad Randall
- crandall@msen.com
-