Measures on Tree Rings

• The measurements will be automatically exported in CSV file after segmentation.

• The unit will be taken directly from TIF file (if available). Otherwise, it will be pixel.

• The measures include:

Column	Description
bbox	The bounding box’s minimum and maximum coordinates on the horizontal and vertical axes.
perimeter	Region’s perimeter, measured as the length of the boundary.
area	Region’s area.
area_convex	Area of the convex hull image, which is the smallest convex polygon enclosing the region.
axis_major_length	Length of the ring boundaries’ major axis.
axis_minor_length	Length of the ring boundaries’ minor axis.
eccentricity	The eccentricity, which ranges from 0 to 1, is the focal distance divided by the major axis length. When the eccentricity is zero, the region becomes a circle.
feret_diameter_max	The maximum Feret’s diameter, which is the largest distance between points across the convex hull.
orientation	Angle between the major axis and the vertical axis, measured in radians and ranging from -pi/2 to pi/2 anticlockwise.
area_growth	The area between the two ring boundaries that experiences growth over a year (except the cases of pith and bark).

• If you would like to add other measurements while running batch, you can modify BatchSegmentTrunk.run in the src/napari_tree_rings/image/process.py. There is an example of area_growth for you to see and refer to.