[gdal-dev] Support of KOLOR KRO raw file

[Pierre CARREAUD]

Hi List,

Do you know if GDAL can read .kro files ? It’s KOLOR Raw format. This type
of file is exported by Kolor Autopano Giga. If not, is it hard to implement?

The format is following: (http://www.autopano.net/wiki-en/Format_KRO )

Header is 20 bytes long :
 3 bytes : "KRO" signature in hex 0x4B 0x52 0x4F
 1 byte  : 0x01 version
 unsigned long : Width
 unsigned long : Height
 unsigned long : depth = > 8 bits, 16 bits, 32 bits  unsigned long : ncomp
=> number of compoment, 4 by default, RGB + Alpha  Data * : the data
uncompressed

- Everything is stored in big endian form ( header and datas )
- the data is stored RGBA, RGBA ( or RGB, RGB if you have 3 component only )
- It's row major order, meaning, you store first row, then second row
- top row is the first row
- Within a row, are columns stored left-to-right
- 16bits format is a 16bits integer (0..65535), not floating point ( it's
not like half floating point in openEXR )
- 32bits format is pure 'c' float stored binary in big endian format ( IEEE
754 binary floating point )
- no color space specification nor metadata stored
- file size limit is ruled by file system

Regards,

Pierre CARREAUD
Responsable d’affaire en topographie et lasergrammétrie


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