'Image Magic' for rebol?
[1/8] from: tim::johnsons-web::com at: 19-Mar-2003 13:39
Hello All: I'm working on a project with a perl programmer. We believe that we may need a feature to trim down an image file size: Perl has such a feature as a external module, but my perl programmer isn't up to speed on it yet. My question is: Does rebol or the rebol community have such a feature? I'm researching the library as I speak. TIA -- Tim Johnson <[tim--johnsons-web--com]> http://www.alaska-internet-solutions.com http://www.johnsons-web.com
[2/8] from: petr:krenzelok:trz:cz at: 20-Mar-2003 8:50
Tim Johnson wrote:
>Hello All: >I'm working on a project with a perl programmer.
<<quoted lines omitted: 6>>>I'm researching the library as I speak. >TIA
Hi, with Rebol, you are provided with closed feature set. It means, you can load bmp, jpg, gif, gifanim, png and save as bmp and png - that should provide you with some means of compression. If you want to try to do something on your own in rebol level, I fear you will be slow. XxY image means lots of pixels to traverse using some loop + some calculations .... You can, however, link Rebol to libraries. It requires /Pro license though (or new SDK, to allow you to encap and release your app, if you want to provide it for free). But, last two or so months proved, that not having free library and shell components in free versions, is holding further rebol accpetance. I tried to defend Rebol (mainly because I have different position and some concrete plans for my rebol usage, so I don't hesitate to byu commercial versions), but it really showed as a show-stopper for rebol. It is long time we (ehm, especially me :-) suggest RT to change their opinion, because I am not sure that /Pro sales outweight the profit, which could be gained, if those components would be free, or at least tied to royalty shceme = free for development and usage ... and if you charge for your work, then royalty would be payed back to RT ... maybe that way more library interfaces would appear and overall benefit would be higher ... but who knows ... cheers, -pekr-
[3/8] from: g:santilli:tiscalinet:it at: 20-Mar-2003 9:48
Hi Tim, On Wednesday, March 19, 2003, 11:39:36 PM, you wrote: TJ> We believe that we may need a feature to trim down TJ> an image file size: What do you mean by "trim down size"? Compression? Or scaling a (for e.g.) 200x200 image to a 100x100 one? If the former, you might try SAVE/PNG, but I'm not sure what level of compression REBOL is using. If the latter, you can do that using the ASPECT effect, then converting the face to an image and saving it; however, you don't get the same level of quality you would get with most tools out there that do the same thing. AFAIK ImageMagik is a package of command line tools to manipulate images; if that is what you are referring to, I think it does not require any advanced knowledge using it: you just call the appropriate tool and it reads your image and saves it back after processing. Regards, Gabriele. -- Gabriele Santilli <[g--santilli--tiscalinet--it]> -- REBOL Programmer Amigan -- AGI L'Aquila -- REB: http://web.tiscali.it/rebol/index.r
[4/8] from: bry:itnisk at: 20-Mar-2003 11:35
>AFAIK ImageMagik is a package of command line tools to manipulate >images; if that is what you are referring to, I think it does not >require any advanced knowledge using it: you just call the >appropriate tool and it reads your image and saves it back after >processing.
ImageMagick (http://www.imagemagick.org/) can be used from the command line however it also provides apis for different programming languages Perl, C++, C, Python, PHP, or Java can call imagemagick functions from directly within the language, not familiar with the others but have looked a bit at magick++ which is for use within c++. If you're on a windows platform there's an ImageMagickObject OLE control which obviously allows you to use imagemagick directly from within com capable languages/environments. For coldfusion one can use Alagad Magick Tag, and there is also a ruby extension to imagemagick. I love imagemagick. It would be so cool if there was a rebol interface to these tools.
[5/8] from: antonr:iinet:au at: 20-Mar-2003 21:31
I think rebol saves a PNG using only basic compression offered by PNG. So I've seen much better optimization by Photoshop. I made a function that will trim the borders of an image! Find it here: http://www.lexicon.net/anton/rebol/library/trim-image.r Anton.
[6/8] from: cyphre:seznam:cz at: 20-Mar-2003 12:27
Bryan, I had a quick look on the ImageMagick site....It seems you only need Rebol with Library interface feature (such as /Pro /Command or SDK), libMagick.a, libMagick.so, or Magick.dll depending on your system, the API docs and enough time to write Rebol interface with ImageMagick API. I did some experiments with simmilar package(XnView / GFL SDK) and Rebol worked well... regards Cyphre
[7/8] from: petr:krenzelok:trz:cz at: 20-Mar-2003 12:16
>>AFAIK ImageMagik is a package of command line tools to manipulate >>images; if that is what you are referring to, I think it does not
<<quoted lines omitted: 14>>>I love imagemagick. It would be so cool if there was a rebol interface >to these tools.
together with Cyphre we did some test interface for http://www.xnview.com library - it is completly free, although the viewer is not fastest on earth, but it supports some +300 image formats ... but even then - who is able to use such interface with rebol? Only ppl owning /Pro license ... -pekr-
[8/8] from: bry:itnisk at: 20-Mar-2003 12:53
>I had a quick look on the ImageMagick site....It seems you only need
>with Library interface feature (such as /Pro /Command or SDK),
>libMagick.so, or Magick.dll depending on your system, the API docs and >enough time to write Rebol interface with ImageMagick API.
That damn time thing being the killer.
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