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Message from discussion MJ2 binaries revisited in branch15
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szukw...@arcor.de  
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 More options Apr 18 2012, 3:25 pm
From: szukw...@arcor.de
Date: Wed, 18 Apr 2012 21:25:12 +0200
Local: Wed, Apr 18 2012 3:25 pm
Subject: [OpenJPEG] MJ2 binaries revisited in branch15
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1. wrap_j2k_in_mj2 input/from_[0:n-1].j2k FROM_J2K.mj2
======================================================
   enumcs: either ENUMCS_SRGB or ENUMCS_GRAY.

1.1. mj2_to_frames FROM_J2K.mj2 FROM_J2K.yuv
     ===========================================
     The input file should be refused because the enumcs is not SYCC
      but SRGB or GRAY.

     Currently BMP files are created using all three components.

1.2. extract_j2k_from_mj2 FROM_J2K.mj2 output/FROM_J2K_[0:n-1]
     =========================================================
     OK: enumcs SYCC is correct.

2. frames_to_mj2 -i FROM_YUV.yuv -o FROM_YUV.mj2
====================================================
   enumcs: ENUMCS_SYCC.

2.1. mj2_to_frames FROM_YUV.mj2 FROM_YUV.yuv
     ===========================================
     OK: enumcs SYCC is correct.

2.2. extract_j2k_from_mj2 FROM_YUV.mj2 output/FROM_YUV
     ==================================================
     The input file should be refused because the enumcs is SYCC
      instead of SRGB or GRAY.

     Currently J2K files are created.

     Using one of these J2K files, e.g. FROM_YUV_00000.j2k:

     j2k_to_image -i FROM_YUV_00000.j2k -o FROM_YUV_00000.bmp

      The BMP file uses component[0] only.

     j2k_to_image -i FROM_YUV_00000.j2k -o FROM_YUV_00000.pnm

      For each component a PNM file is created.

     j2k_to_image -i FROM_YUV_00000.j2k -o FROM_YUV_00000.png

      Refused.

     j2k_to_image -i FROM_YUV_00000.j2k -o FROM_YUV_00000.tga

      Refused.

     j2k_to_image -i FROM_YUV_00000.j2k -o FROM_YUV_00000.tif

      Refused.

The attached patch corrects the code in the mj2 directory.

As the values for ENUMCS_GRAY and ENUMCS_SRGB are wrong, I have
put the three values into openjpeg.h: one file, one change.

The correct values are:

#define ENUMCS_SRGB 16
#define ENUMCS_GRAY 17
#define ENUMCS_SYCC 18

winfried

  openjpeg-branch15-r1626-2-MJ2.dif.gz
10K Download

 
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