jpeg-lossless-decoder-js

JPEGLosslessDecoderJS
=====
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])

$3

API and more examples

``javascript
var decoder = new jpeg.lossless.Decoder();
var output = decoder.decompress(buffer [, offset [, length]]);

// Parameters
// {ArrayBuffer} buffer
// {Number} offset offset into buffer (default = 0)
// {Number} length length of buffer (default = end of JPEG block)

// Returns
// {ArrayBuffer} output (size = cols rows bytesPerComponent * numComponents)
`

$3

Get a packaged source file from the release folder:

* lossless.js
* lossless-min.js

Or install via NPM:

`
npm install jpeg-lossless-decoder-js
`

$3


`
npm test
`

$3

`
npm run build
`
This will output lossless.js and lossless-min.js alongside declaration files and source maps to /release`.

$3

This decoder was originally written by Helmut Dersch for Java. I added support for selection values 2 through 7, contributed bug fixes and ported to JavaScript.

Also thanks to @jens-ox for modernizing this package to TypeScript.