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JPG2000

JPEG 2000 is a new image coding system that uses state-of-the-art compression techniques based on wavelet technology. This is the successor of the well-known traditional JPEG written by the ISO group Joint Photographic Experts Group. Contrary to the technology JPEG which used DCT functions, JPEG2000 technology is based on an mathematical algorithm called wavelets to compress image that provides high compression with image quality superior to all existing standard encoding techniques even at low bit rates.
That's the reason why JPEG2000 has a number of advantages over the JPEG Format.


Standard JPEG file

JPEG2000 file

JPEG2000 Advantages vs. JPEG ?

  • Higher compression without compromising quality.
  • Alpha transparency
  • Lossless compression mode
  • 16-bit color
  • Define Region of interest that allows to define some important areas to be compressed at a higher quality than other one.
  • Lossy and lossless compression: have the choice of loosing quality but having little files or preserve all the quality but still saving a lot of space.
  • No artifact with very high compression.
  • The JPEG2000 file format is XML based metadata.


JPEG2000 format choosen by AbsolutVision

To correctly open our JPEG 2000 images, you will need the Adobe Photoshop JPEG2000 plug-in or Adobe Photoshop 8.
We have choosen this extended JPEG2000 file format (.jpf) because Photoshop "path" could also be saved.
With our Pro JPEG2000 files, you will get then an alpha channel and a path for a fast and easy image-editing solution.

Installing the JPEG2000 plug-in in Adobe Photoshop CS3

Photoshop does not include the JPEG 2000 plug-in by default. You must install it manually. To save files in the JPEG 2000 format, you must get the optional JPEG 2000 plug in and install it in this location: Adobe Photoshop CS3/Plug Ins/File Formats. This plug in is available from the Photoshop CS3 installation CD in Goodies/Optional Plug Ins/File Formats. Extended JPEG 2000 (JPF) format provides an expanded set of options compared to the standard JPEG 2000 (JP2) format. However, you can make files JP2 compatible by selecting the appropriate option in the JPEG 2000 dialog box.

Source: Adobe® Help Ressource Center

More informations about the JPEG2000 file format

If you wish to know more about jpeg2000, you can take a look at the following websites:
http://en.wikipedia.org/wiki/JPEG_2000
http://www.jpeg.org/jpeg2000/
http://www.jpeg2000info.com/