2005.06.22 13:18 "Re: [Tiff] API needed", by Frank Warmerdam

Is there an API available in LIbtiff that supports the following:

Input - can be smaller than strips/tiles (an incomplete strip or tile)
          for example: a data of 8Kb from a image of 50Kb which has 5 strips of 10Kb each.

Output - raster of RGB data, size depends on the input's size

Katrina,

I believe the only libtiff functions for reading image chunks smaller than a tile/strip is the scanline oriented interface. Generally speaking you would need to manage the tiles/strips yourself to extract an arbitrary subwindow.

Many higher level imaging APIs using libtiff will take care of this for you, including my geospatially oriented GDAL library.

http://www.gdal.org/

I would be the first to conceed that the libtiff API is very closely tied to the TIFF organization itself, and does not provide a very abstract interface to the underlying image data.

Best regards,

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