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Rémi Cresson requested to merge zonalstatistics into develop


Add a new application for zonal statistics.


There is currently no such application in the Orfeo ToolBox. This application enables to compute statistics (min, max, mean, standard deviation) of objects in a vector image.

Implementation Details

Input objects can be described from a vector data, or from a label image:

  • mode vector: the VectorData is rasterized at the same origin/spacing/size as the input image. Polygons are numbered starting from 0. The statistics are computed using a StreamingStatisticsMapFromLabelImageFilter.
  • mode label image: the statistics are directly computed using a StreamingStatisticsMapFromLabelImageFilter, from the input image and the label image.

The application enables to produce output stats in multiple forms:

  • as XML (Using a XMLFileWriter as the ComputeImagesStatistics application do),
  • VectorData (stats are written in features of each polygons),
  • or Raster (stats are stored in bands of the output image)
Classes and files
  • A new application in AppClassification: ZonalStatistics (otbZonalStatistics.cxx)
  • 5 tests were added in AppClassification/test

New: ZonalStatistics application (otbZonalStatistics.cxx)

  • Input vector / Output vector
  • Input raster / Output XML (without nodata-value for the label image)
  • Input raster / Output XML (with nodata-value for the label image)
  • Input vector / Output raster
  • Input raster / Output raster

I've pushed a new branch in otb-data called "zonalstatistics" which contains new files in baseline and input:

  • Baseline/apTvClVectorData_QB1_ter_with_stats.sqlite
  • Input/Classification/VectorData_QB1_ter.tif
  • Baseline/apTvClVectorData_QB1_ter_stats.xml
  • Baseline/apTvClVectorData_QB1_ter_stats_nodata.xml

Additional notes

Please feel free to discuss this feature.


The copyright owner is IRSTEA and has signed the ORFEO ToolBox Contributor License Agreement.

***Check before merging:*** - All discussions are resolved - At least 2 👍 votes from core developers, no 👎 vote. - The feature branch is (reasonably) up-to-date with the base branch - Dashboard is green - Copyright owner has signed the ORFEO ToolBox Contributor License Agreement
Edited by Rémi Cresson

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