Improve support for region of interest

[gcode-importer]

Originally reported on Google Code with ID 39

It would be very useful to be able to specify a rectangular region of interest to be
extracted when using j2k_to_image. This is especially useful when working with very
large images where only small portions of the images are needed.

Reported by keith.hughitt on 2010-09-15 07:44:48

[gcode-importer]

Reported by malaterre on 2012-05-29 13:31:38

• Labels added: Milestone-Release2.0

[gcode-importer]

Reported by malaterre on 2014-02-25 14:20:44

• Labels added: Priority-Low
• Labels removed: Priority-Medium, Milestone-Release2.0

[gcode-importer]

Reported by malaterre on 2014-02-25 15:42:40

[gcode-importer]

$ opj_decompress -h
[...]
  -d <x0,y0,x1,y1>
    OPTIONAL
    Decoding area
    By default all the image is decoded.

Reported by malaterre on 2014-03-04 14:50:51

• Status changed: Fixed
• Labels added: Milestone-Release2.1

[gcode-importer]

The decode area didn't take into account the case where the file is not tiled.
In this case all the image is decoded and only the decoded area is written in the output
file.

Reported by savmickael on 2014-03-06 11:39:31

• Status changed: Accepted

[gcode-importer]

Reformulating OP request. OpenJPEG should provide a low level functionality to decode
only portion of the image based on precinct (case image is single tiled for example).
Until issue 94 is solved, this cannot be fixed.

Reported by malaterre on 2014-03-06 11:50:49

• Labels removed: Milestone-Release2.1
• Blocked on: Large single-tile image and memory: need low level streaming implementation #94

[rouault]

This is addressed by PR #1010

[rouault]

Now solved with PR #1010 merged