The full release of LeafAnalyser is now available from the downloads section at sourceforge. The latest version is available as an installer for Windows or a source archive.

The source code is available from the subversion repository and is released under the GNU General Public Licence.

The forums have been moved to sourceforge and there is now a hosted trac project for managing the development of LeafAnalyser. By registering with sourceforge you should be able to gain access to both the forum and trac site. Please submit bug reports and feature requests using the trac ticketing system and not the forum.

LeafAnalyser has been developed as a fast throughput leaf shape analysis application. It contains the following features:

• Automated image processing
  • Gaussian blur
  • Thresholding
  • Object margin detection
  • Object centroid calculation
  • Leaf tip estimation
  • Object sorting
  • Landmark assignment
• Data Analysis
  • Loading of data from text files
  • Assignment of data groups
  • Principal Components Analysis
• Interactive Graphs
  • 3D graphs can be rotated and zoomed using the mouse
  • Graphs provide selection of which Principal Component axes are displayed plus customisation of various output styles
  • 2D and 3D graphs can display the following information:
    • Scatter graph of all leaf data (colour coded by group)
    • Ellipsoids represented the mean and standard deviations of each group
    • Alternatively ellipsoids can be used to represent each node of each group individually
    • Information can be scaled uniformly or independently
  • Variation graphs show the contribution of a single Principal Component to the object shape

Although this application has been specifically developed for analysing leaf shapes, it can be used to process anything that is reasonably two-dimensional, has a clear outline and can be scanned. There also needs to be a reliable point of reference (as in the leaf tip) at which the landmarks can begin.