About the orientation


#1

In the MeasureObjectAreaShape Module, within the Manual we can not find the explanation of the feature: Orientation, what does it represent, how is computed and what is the unit? (Is it counterclockwise or clockwise angle of what?)


#2

Hello,
Many of the features measured by CellProfiler are based on built-in Matlab functions. This is one of them, so the description provided by Matlab is accurate:

‘Orientation’ — Scalar; the angle (in degrees) between the x-axis and the major axis of the ellipse that has the same second-moments as the region.

For future reference, you can find descriptions of other measurements here:
mathworks.com/access/helpdes … props.html

We will add this information to the CellProfiler help so it’s easy for others to find in the future!
Cheers,
Anne


#3

Thank you very much!