Fit ellipsoid

Finds the ellipsoid that best fits a set of point or multi-point ROIs in the ROI Manager. Fit Ellipsoid tries to find the ellipsoid by solving the equation of a quadric that best fits the points. There are no guarantees about the type of the quadric solved, so the plug-in may fail to find an ellipsoid. Generally speaking, the more points there are the more likely it is that en ellipsoid is found.

Fit ellipsoid

• Menu path: Plugins>BoneJ>Fit ellipsoid
• Input paremeters
  • ImagePlus inputImage
• Output parameters
  • Table<DefaultColumn<String>, String> resultsTable
• Calls
  • Quadric in net.imagej.imagej-ops
  • QuadricToEllipsoid in org.bonej.bone-ops (to be moved to net.imagej.imagej-ops or other fitting artefact)

Setup dialog

• No setup dialog

Messages

• If there's no image open
  • Show an error dialog
  • Abort the run
• If the input image doesn't have three spatial dimensions
  • Show an error dialog
  • Abort the run
• If the image has anisotropic voxel size (calibration)
  • Show a warning dialog
  • Abort the run, if user clicks Cancel
• If there are less than 9 points (minimum needed for fitting)
  • Show an error dialog
  • Abort the run
• If the fitted quadric is not an ellipsoid
  • Show an error dialog
  • Abort the run

Results

• Radii and centroid coordinates of the fitted ellipsoid (SharedTable)

Differences from BoneJ1

• Supports multi-point ROIs