Please login or register.

Login with username, password and session length
Advanced search  

News:

For WME related articles and tutorials visit WME Resource Center.

Author Topic: Jpeg 2000  (Read 5821 times)

0 Members and 1 Guest are viewing this topic.

leucome

  • Occasional poster
  • **
  • Karma: 0
  • Offline Offline
  • Gender: Male
  • Posts: 86
    • View Profile
    • Leucome Games
Jpeg 2000
« on: February 14, 2007, 03:24:52 AM »

I wish Wme will support the jpeg 2000 one day ...
Because jp2 have an alpha channel and good compression.

I have tried with one scene picture(with an alpha channel)..
THe result ...
In Tga(rle)  900K
In png        700k
In jpeg 2000 50k  (80% quality)
I think it talk by itself ...

The JasPer Project Home Page  (open-source jpeg 2000) I it can help..
http://www.ece.uvic.ca/~mdadams/jasper/

Logged
Look my Site ——► http://news.leucome.ca

odnorf

  • w00t?
  • Global Moderator
  • Addicted to WME forum
  • *
  • Karma: 7
  • Offline Offline
  • Gender: Male
  • Posts: 1454
  • Lamp dog!
    • View Profile
Re: Jpeg 2000
« Reply #1 on: February 14, 2007, 04:49:52 PM »

jpeg2000 is a heavily patented format and there *might* be legal issues with it's usage in a commercial game.

http://en.wikipedia.org/wiki/JPEG_2000#Legal_issues

Better stay on the safe side than risk  ;)
Logged
fl*p

leucome

  • Occasional poster
  • **
  • Karma: 0
  • Offline Offline
  • Gender: Male
  • Posts: 86
    • View Profile
    • Leucome Games
Re: Jpeg 2000
« Reply #2 on: February 15, 2007, 12:01:54 AM »

Maybe the  Jng files.. It relatively unused format but it s free to use ... and make file of about 250k for the same scenes
Or pay to use the jpeg 2000. But it seem to be legal to use the Jasper  implementation of the codec.

Or an other compresed files format with alpha channel...  Or use to seperate jpeg  one for the picture and one for the alpha.
Logged
Look my Site ——► http://news.leucome.ca

odnorf

  • w00t?
  • Global Moderator
  • Addicted to WME forum
  • *
  • Karma: 7
  • Offline Offline
  • Gender: Male
  • Posts: 1454
  • Lamp dog!
    • View Profile
Re: Jpeg 2000
« Reply #3 on: February 15, 2007, 12:33:10 AM »

Maybe the  Jng files.. It relatively unused format but it s free to use ... and make file of about 250k for the same scenes
Or pay to use the jpeg 2000. But it seem to be legal to use the Jasper  implementation of the codec.

Or an other compresed files format with alpha channel...  Or use to separate jpeg  one for the picture and one for the alpha.


The fact there are implementations of a codec doesn't mean it's not patented. There are opensource implementations (for "educational" purposes which is legal) of almost every codec but still the use for professional usage is not free. You still have to buy the right to use the patents.

Maybe the jpeg2000 patent holders (noone knows exactly who they are, blame the whole patents idea) won't sue projects like wme but we don't know that for sure.
Logged
fl*p

leucome

  • Occasional poster
  • **
  • Karma: 0
  • Offline Offline
  • Gender: Male
  • Posts: 86
    • View Profile
    • Leucome Games
Re: Jpeg 2000
« Reply #4 on: February 16, 2007, 12:20:24 AM »

Oh yes it seem to be so many trouble ...

Ok i will make a new official Wish and suggestions ... Hehe

Be able to use a second standar jpg as aplha channel ... maybe just grab the luminance (if it's posible) This way i think we will not need to convert the file to a greyscale before put it in the alpha..
Logged
Look my Site ——► http://news.leucome.ca

Mnemonic

  • WME developer
  • Administrator
  • Addicted to WME forum
  • *
  • Karma: 39
  • Offline Offline
  • Gender: Male
  • Posts: 5666
    • View Profile
    • Dead:Code Site
Re: Jpeg 2000
« Reply #5 on: February 16, 2007, 09:36:28 AM »

Is the file size really such a big issue nowadays to make it worth the hassle? :)
Logged
Yes, I do have a twitter account
Please don't send me technical questions in private messages, use the forum. ::wave

leucome

  • Occasional poster
  • **
  • Karma: 0
  • Offline Offline
  • Gender: Male
  • Posts: 86
    • View Profile
    • Leucome Games
Re: Jpeg 2000
« Reply #6 on: February 16, 2007, 10:08:14 PM »

If the final product take 100mb  instead of 1Gb ... I think yes
Anyway if it to hard to do, do not bother with this...
I will try to desing my scenes in a way to use as less a posible the alpha channel.
Maybe i will decorate using realtime 3d objects..
Logged
Look my Site ——► http://news.leucome.ca
 

Page created in 0.862 seconds with 18 queries.