circletracking

Circletracking is a module for quantitative tracking of circles (and ellipses) in 2D or 3D images.

Overview

Detect bright circles on a dark background with subpixel accuracy. The circle needs to have a Gaussian-like radial profile.

• find_ellipse and find_ellipsoid crudely find the ellipse/ellipsoid
• refine_ellipse and refine_ellipsoid interpolate the image lines originating from the estimated center, locates the ellipse/ellipsoid boundary with subpixel accuracy and fits an ellipse/ellipsoid to the obtained points
• locate_ellipse and locate_ellipsoid combine find and refine in one routine
• routines in artificial generate artificial ellipses/ellipsoids for testing purposes

Testing

Unittests ensure high accuracy:

• on ellipses with 20% random noise: 0.1px for center and 1% for radius
• on ellipsoids with 20% random noise: 0.5px for center and 5% for radius

More information

Please consult the docstrings for more details.