JPX.js fails to render J2K files

[louismullie]

From what I understand, JPEG 2000 (.jp2, .j2k) is a subset of JPEG 2000 Extended (.jpx, .jpf) - therefore JPX.js should be able to render J2K files.

However, working with JPEG2000 data extracted from the Enterix data set, I get unexpected results with JPX.js as compared with openjpeg.js (and the openjpeg command line tool).

Result with jpk.js

Result with openjpeg.js

Here is the code I am using: https://gist.githubusercontent.com/louismullie/dca8a3fa351cc955b38f/raw/199dbfc000088b125dffa2235308d2baf73d0464/jpx-j2k-bug.html

Anybody have ideas as to what explains this kind of behaviour? Is JPX.js built to support J2K as a subset of JPX?

[louismullie]

Incidentally, JPX.js is much faster than openjpeg.js and could be incredibly useful as a standalone library for JPEG2000 reading in Javascript (one key application would be for use in DICOM web viewers). Are any of @ivmartel, @chafey and @mi-kas interested in contributing from this point of view?

The sheer number of issues related to JPX.js on this repository would be another argument in favour of making this a separate repo.

[Snuffleupagus]

@louismullie Could you please create a PDF file with that image, and provide a link to it here?
That would make testing this a lot easier for us!

[jpambrun]

@louismullie look at my last comment in PR #5727.

[louismullie]

Merci @jpambrun, the PR #5727 fixes this issue. Closing!