Compression Wood – Image analysis

Compression wood detection in Scots pine viewed in transmitted light

Using Compression Wood Analysis 1.0 software (Dianthus/SLU)
Photograph courtesy of Swedish University of Agricultural Sciences

Compression wood detection in Norway spruce

Photographs courtesy of University of Freiburg

Compression wood detection in Sitka spruce viewed in reflected light

Using Optimas 6.5 (Media Cybernetics) image analysis software
Photographs Forest Research

Use of a digitiser to assess the disc and ring shapes, and shape of the zone of compression wood

Photographs courtesy of Institut National de la Recherche Agronomique (INRA) – France

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  Image of the disc
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  Results of the automated treatment
  DistPG : disc eccentricity
  CWAS : compression wood angular sector (between the two green lines).
  CWMP : compression wood angular sector mean position
  In blue, the geometric centre of the disc (big square) and the geometric centre of the compression wood area (little square)