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JPEG2000 Compression

Description:

JPEG 2000 is based on the discrete wavelet transformation (DWT), scalar quantization, context modeling, arithmetic coding and post-compression rate allocation.
JPEG 2000 provides random access (i.e. involving a minimal decoding) to the block level in each sub-band, thus making possible to decode a region of the image without having to decode it as a whole. These two features could be very advantageous in applications such as digital libraries.
From a functionality point of view JPEG 2000 is a true improvement, providing lossy and lossless compression, progressive and parseable bitstreams, error resilience, region of interest, random access and other features in one integrated algorithm. Concerning error resilience JPEG 2000 offers higher protection than JPEG, as shown in the previous section.
JPEG 2000 provides the most flexible solution, combining good compression performance with a rich set of features. At present we can offer you our last software which can code from BMP to JPEG 2000 and WLT and can decode from these formats back into BMP one by one files or file packages.

We have been working with the jepeg2000 format for a long time. For the moment we have a codec (compressor and decompressor) which allows to code photos in jpeg2000 format. We also have a java applet which allows to decode them. You can see an example of its work below. More than that we have developed a video codec which compress frames in jpeg2000 format. This codec does not support real-time because of complexity of the algorithm but it has nice quality even at low bit rates.

We are ready to develop algorithms and applications on the basis of our technology of working with jpeg2000 format. We are also ready to adapt out technologies to customers requirements.

If you have any questions or suggestions feel free to contact us xp@alparysoft.com.

Comparing of the traditional JPEG algorithm, and new engine of the JPEG2000

Source BMP image size is 310 kilobytes. Full six-layer JPEG2000 image has size 15,682 kilobytes.

6 layers decoded
size 15,682 kb

4 layers decoded
size 6,335 kb

only two layers
size 1,189 kb

one layer
size 0,445 kb

Compare the quality of images with same size.

Jpeg
size 7,581 kb

Jpeg2000
size 7,581 kb

Jpeg
size 3,450 kb

Jpeg2000
size 3,450 kb

Jpeg
size 1,622 kb

Jpeg2000
size 1,622 kb


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