RE: [newbie] read a pixel!
I think perl with the image magick module can do what you ask... go to search.cpan.org and search for "image" you'll find a ton of stuff.. you can even generate images with them.. its very cool. rgds Frank -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Damian G Sent: Friday, August 16, 2002 3:40 PM To: lista-linux-newbie Subject: [newbie] read a pixel! i need a suggestion on programming languages. this is how it goes. i need to build a program that can tell me the RGB value of a given pixel inside of an image file. that is, load a graphic from file, and reading color values from it regardless of whether it's showing on the screen or not. i've tried kylix Open edition, but it fails to do it ( probably buggy libs ) as it loads and displays a graphic correctly on the form but when i try to read a pixel from it... the RGB value i get is wrong ( i think it's getting converted to 8-bit palette ) while the same code does run correctly on windoze's Delphi 5, ( so much for cross-plattform programming ) i hate having to reboot my computer ( or even loading a virtual machine ) just for the sole purpose of barfing fome clumsy lines of code -besides i'd like the linux binary- , so i've decided that i need to learn something other than pascal for killing time... can anyone recommend me a programming language that allows me to do this pixel-reading stuff and is as simple as possible? ( i will have to learn C sometime, but for the moment i think is a bit overkill... is there a choice? ) Damian -- Who is General Failure, and why is he reading my disk? Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
Re: [newbie] read a pixel!
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Fri 16 August 2002 8:40 am, Damian G wrote: > i need a suggestion on programming languages. > > this is how it goes. > > i need to build a program that can tell me the RGB value > of a given pixel inside of an image file. that is, load > a graphic from file, and reading color values from it > regardless of whether it's showing on the screen or not. > > i've tried kylix Open edition, but it fails to do it > ( probably buggy libs ) as it loads and displays a > graphic correctly on the form but when i try to > read a pixel from it... the RGB value i get is wrong > ( i think it's getting converted to 8-bit palette ) > > while the same code does run correctly on windoze's Delphi 5, > ( so much for cross-plattform programming ) i hate having > to reboot my computer ( or even loading a virtual machine ) > just for the sole purpose of barfing fome clumsy lines of > code -besides i'd like the linux binary- , so i've decided that > i need to learn something other than pascal for killing time... > > > can anyone recommend me a programming language that allows > me to do this pixel-reading stuff and is as simple as possible? > ( i will have to learn C sometime, but for the moment i think > is a bit overkill... is there a choice? ) Python will do very nicely; it's installed by default and the command line is 'just there'. I strongly recommend it as a grievously underestimated language. A good place to get started is at O'Reilly: http://www.onlamp.com/python/ You'll need to include a graphics manipulation library. I haven't used it in anger, but the Python Image Library: http://www.pythonware.com/products/pil/index.htm certainly does what you need, according to the online manual (see the getpixel method)! Alastair - -- Alastair Scott (London, United Kingdom) http://www.unmetered.org.uk/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.0.7 (GNU/Linux) iD8DBQE9XLDXdasIDb/2nMwRAiQSAJsFeQs/nIrpUwyllGJ7ib8HB74g4QCdELLj PN47BOPxA1Kkj1FiNWaa0sM= =I/Ju -END PGP SIGNATURE- Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
[newbie] read a pixel!
i need a suggestion on programming languages. this is how it goes. i need to build a program that can tell me the RGB value of a given pixel inside of an image file. that is, load a graphic from file, and reading color values from it regardless of whether it's showing on the screen or not. i've tried kylix Open edition, but it fails to do it ( probably buggy libs ) as it loads and displays a graphic correctly on the form but when i try to read a pixel from it... the RGB value i get is wrong ( i think it's getting converted to 8-bit palette ) while the same code does run correctly on windoze's Delphi 5, ( so much for cross-plattform programming ) i hate having to reboot my computer ( or even loading a virtual machine ) just for the sole purpose of barfing fome clumsy lines of code -besides i'd like the linux binary- , so i've decided that i need to learn something other than pascal for killing time... can anyone recommend me a programming language that allows me to do this pixel-reading stuff and is as simple as possible? ( i will have to learn C sometime, but for the moment i think is a bit overkill... is there a choice? ) Damian -- Who is General Failure, and why is he reading my disk? Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
