Module:

jp2

Module Maintainer:

Daniele Romagnoli

Status:

(star)(star)(star)(star)

Email Help:

Geotools-gt2-users@lists.sourceforge.net

Volunteer:

geotools-devel@lists.sourceforge.net

IP Review:

review.apt

Plugin to support decoding JP2 and (limited) JPX files by means of either JJ2000, Jasper or Kakadu.

Module Status

Gold Star Quality Assurance Check

(star) IP Check: review.apt added, all headers are in place
(star) Quality Assurance: More than 60% test coverage reported by cobertura.
(star) Stability: No planned API changes
(star) Supported: Documents available. Module maintainer does watches user list, answers email.

Aim

The aim of this module is to allow access JPEG2K data using the Kakadu driver via the imageio-ext-kakadujp2 plugin we have prepared on imageio-ext (Which uses JNI) when the Kakadu SDK can be found in the path; otherwise the standard JAI ImageIO JPEG2K plugin will be used. Notice that at this stage if Kakadu sdk is absent we will not be able to leverage on JP2 boxes to parse georeferencing information, but we will simply look for prj and world file.
The underlying data access logics will be based on some of the key objects introduced by Simone on its imagemosaic plugin such as RasterManager, RasterLayerRequest, RasterLayerResponse which are preposed to handle any control/logics involving resolutions/envelope/overviews/crop/requests/... management.

Future plans

The idea is to proceed with improvements and tests on the previously introduced concepts/objects in order to extract a base architecture which may be shared by plugins to access coverages.
Example of future tasks during the development of the plugin include:

Leveraging Kakadu

Kakadu is a powerful implementation of the JPEG2000 standard.
It allows to build a set of JNI DLLs which may be used via Java through a Jar package containing bindings to the native libs. Our ImageIO-Ext kakadu plugin is based on this.
(The imageio-ext site already contains information about the Kakadu capabilities as well as instructions on how to setup and build the required kakadu native libs.)

The Image I/O-Ext project

The Image I/O-Ext project leverages existing native APIs to extend the set of formats that the JAI ImageIO API can read.
Actual version of Image I/O-Ext is 1.0.5.

Outstanding Issues