Research

The wood quality in a log can be analyzed to some extent by examining
the log end face. Such analysis is mostly performed manually at saw mills,
where the log scaler has a couple of seconds to determine features
like the approximate annual ring density, presence of rot and
presence of compression wood. By using an image analysis application
instead, the analysis can be more robust. In this project, methods to
measure important properties of logs in saw mill environment using
computerized image analysis are developed.

Project descriptions can be found in the CBA annual report from 2008.
See project number 4, 30 and 31.

Synthetic Data

In addition to the research on methods for measuring tree quality a synthetic image generator was developed. Code for generating synthetic log end face images as well as 100 synthetic images are provided here, according to the publication

Kristin Norell
Creating Synthetic Log End Face Images
6th International Symposium on Image and Signal Processing and Analysis ISPA 2009, September 16-18, 2009, Salzburg, Austria

A zip-file including matlab code syntheticData.zip
A zip-file including 100 generated synthetic images dataset.zip

Images

We use images taken in on-line production at a sawmill. The logs are
passing the camera on a conveyor as the images are taken. Examples of
images used can be seen below. (Click for full resolution.)

The images are free to download and use for non-profit purposes.
In any usage of the images, The Swedish Timber Measurement Council
and Kristin Norell must be acknowledged.