Â© 2011 Pegasus Imaging Corporation, DBA Accusoft Pegasus 1 | P a g e
How to View JPEG 2000 Images Faster
The PICTools JPEG 2000 Transcode Opcode
View JPEG 2000 Images Faster
Application users can now view JPEG 2000 images faster than ever before. Accusoft
Pegasus offers improvements to JPEG 2000 processing that allow images to be
transcoded, resulting in up to 40% faster decompression without introducing additional
loss to the image.
This patent-pending image processing technology is now delivered in the PICTools
Transcoder library, allowing application developers the ability to losslessly transcode
J2K images for faster viewing, without the need to decompress/re-compress.
Transcoding is much faster than decompress/re-compress and is a lossless operation
even for lossy J2K original images. The resulting image is fully standards-compliant and
will decompress faster with any decompression engine on the market. However, using
PICTools JPEG 2000 decompression library will result in up to 40% performance
improvement for images transcoded using the speedup option in the Transcoder library.
Accusoft Pegasus has developed a sample Windows application that allows users to
evaluate this decompression performance increase using their own JPEG 2000 images.
Application Developers are also welcome to use the sample code as a starting point to
develop applications that take advantage of these optimizations. The remainder of this
document describes the sample application.
Comparing Original and Transcoded Decompression Times
In order to determine the actual speed increase, a test application was developed and is
described in this whitepaper. The test applicationâ€™s method of operation is as follows.
A JPEG 2000 image file is read into a memory buffer. That memory buffer is transcoded
by the PICTools JPEG 2000 transcode operation to produce a new JPEG 2000 image in
an output memory buffer. The output memory buffer is then written to a new image file.
Both files are then deco