Position Estimation Using Image Derivative
Daniele Mortari, Francesco deDilectis, Renato Zanetti · NASA STI Repository (National Aeronautics and Space Administration) · 2015
This paper describes an image processing algorithm to process Moon and/or Earth images. The theory presented is based on the fact that Moon hard edge points are characterized by the highest values of the image derivative. Outliers are eliminated by two sequential filters. Moon center and radius are then estimated by nonlinear least-squares using circular sigmoid functions. The proposed image processing has been applied and validated using real and synthetic Moon images.