segment

Updates to Jud Harward and Curtis Woodcock's segmentation algorithm.

Woodcock, C and VJ Harward. 1992. Nested-hierarchical scene models and image segmentation. International Journal of Remote Sensing 13 (16): 3167-3187. http://dx.doi.org/10.1080/01431169208904109

Roadmap

• Extract segmentation algorithm from larger IPW library
  • Only import IPW components needed for segmentation
  • Working Makefile
  • Separate segment source from IPW dependencies
• Create test suite for validation of progress
  • Validate against segment on BU cluster
• Replace IPW IO with newly written IO using GDAL
• Toggle on/off writing of region map during segmentation passes
  • I'm not sure we care so much about tracking regionmap progress anymore
  • Would speed up program if we removed IO
• Upgrade to int datatypes from uchar_t
• Create Python friendly binding to core segmentation algorithm
  • Would be VERY nice to be able to call segmentation program on NumPy arrays
• Port other utilities useful for image segmentation from IPW
  • Utility for scaling imagery to a given range
    • Linear 2%
    • Histogram equalization
  • Apply segmentation to pixel based map based on some rule (e.g., plurality)

Reference

• http://www.gdal.org/gdal_tutorial.html
• http://www.gdal.org/gdalinfo_8c.html
• https://github.com/rouault/gdal/blob/trunk/gdal/apps/gdal_translate.cpp