A common DICOM compression format is JPEG Lossless. This format is generally not supported in standard JPEG decoder libraries.
This decoder can read data from the following DICOM transfer syntaxes:
- 1.2.840.10008.1.2.4.57 JPEG Lossless, Nonhierarchical (Processes 14)
- 1.2.840.10008.1.2.4.70 JPEG Lossless, Nonhierarchical (Processes 14 [Selection 1])
###Usage See tests/driver.js to run this example:
var decoder = new jpeg.lossless.Decoder(compressedBytes); // optional second parameter to specify 1 or 2 byte output
var decompressedData = decoder.decode();###Testing
npm test
###Building See the release folder for the latest builds or build it yourself using:
npm run build
This will output lossless.js and lossless-min.js to build/.
###Bower
This library is distributed via bower under the name jpeg-lossless-decoder-js. Bower utilizes git's tagging mechanism to manage versions. Each time a new version is released, the version should be tagged using git so it can be found by bower. After a new version is released and pushed to github, you can do the following:
git tag -a 1.0.0 -m "Version 1.0.0"
git push origin master --tags
###Acknowledgments This decoder was originally written by Helmut Dersch for Java, later released by JNode. I added support for selection values 2 to 7 and ported to JavaScript.