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Image scaling/encoding

Tonny Tssagovic
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Joined: Dec 30, 2003
Posts: 226
Hi ranchers,
Well, I need to change the scale/encoding of an image, so I wanted to ask you guys what is the best way to do that..
I have checked the j2se api for more then 2 hours, and I will not spend a minute extra.. The idea that I have from the api so far is to use
different image readers writers,(that inherit from javax.imageio.ImageReader )which have a read function that returns a
java.awt.image.BufferedImage object and the
javax.imageio.ImageReadParam which has the parameters of an image like width / height and could be passed to the different read functions of these Imager resders as a parameter.
So if I have a byte that contains a gif image and I want to transfrom that image to a smaller png image, I will set the desired dimention of the javax.imageio.ImageReadParam that I will pass to the pngreader, so when I read from it I will get a BufferedImage with the desired diemnntion..
Well sorry about this messy message, but I hope you will get it if you used image IO before..
My questions are: I think it could be done this way, but is it the right way (THE BEST wa) ? what is the best way to change the sacle and the encoding of an image without using any 3.rd party API (unless it is free and I don't have to make my source available) and the one that will work with all the 1.4+ JREs.? I have seen Java Advanced Imaging at sun's site, there is no need for it right? and it is not part of the standard JRE, right? The software will reside in a server, and it would be cool if it is quite fast, since it will probably have many users.. and should not use an API that I can not bundle in my application..
THANK YOU VERY much .. any help will be apriciated.
PS: It does not need to be hiper cool, and I have max 6 hours to make it work and test it, so please do not refer to some complex APIs, or image processing stuff. Awaiting your reply!
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Image scaling/encoding