[Gdal-dev] GDAL, JasPer, JPEG2000 memory management plans?

[Andrey Kiselev]

On Wed, May 07, 2003 at 12:11:25PM -0600, Brent Fraser wrote:
>     I've done some experimenting with GDAL's JPEG2000 capabilities on
>     Windows 2000. While I got good results with a small (2mb, 929 x
>     986 pixels, RGB) and medium (20 mb, 2961 x 2270, RGB) size files,
>     I noticed memory management  problems with large (100 mb, 4482 x
>     x9011, RGB) and huge (1 gb, 18595 x 19729, RGB) files.

Brent,

Frank exactly describes the situation with JasPer. This library in
current state is not suitable for large image processing. It has
significant memory requirements. In fact you will need in 8x-10x times
more memory than needed for storing whole uncompressed image and image
always will be fully uncompressed into memory. And we can't take only
parts of raster.

JasPer author knows about this problems and he is working to help us.
Eventually JasPer should become more suitable for our needs.


-- 
Andrey V. Kiselev
Home phone:  +7 812 5274898  ICQ# 26871517