klhjCircle Points Error

The Circle Points Error tool compares a set of points to an ellipse/circle and gives several readings defining the error between them.

Using the Circle Points Error Tool

Drag any tool that defines a ellipse/circle onto the "Ellipse" area of the Circle Points Error tool's inputs page.  Use the dropdown menu to select "ellipse" or "circle". Next drag a set of points onto the "Points" area of the inputs page, and use the dropdown menu to select "points". Typically the set of points will be an analysis of the same part of the image from which the circle was defined.  

When the tool is run a best fit circle is generated from the points.  This best fit circle, along with the points themselves will be compared to the ellipse/circle defined on the inputs page.  The results will be recorded in the parameters page.

Mean Radius is the average radius of the best fit circle generated from the points collection.  

Minimum Error is the difference between the smallest radius of the best fit circle generated from the points collection and the radius of the circle defined in the inputs page.

Maximum Error is the difference between the largest radius of the best fit circle generated from the points collection and the radius of the circle defined in the inputs page.

Variation Error is the standard deviation.

MaxMin Error is the difference between the Minimum and Maximum Error.

Minimum Radius is the smallest radius of the best fit circle.

Maximum Radius is the largest radius of the best fit circle.