IMAGE PROCESSING FOR LAUNCH PARAMETERS MEASUREMENT OF OBJECTS IN FLIGHT

摘要

An example embodiment includes a method of measuring launch parameters of an object in flight. The method includes capturing images of an object in flight. A radius of the object and a center of the object are identified in each of the images. A velocity, an elevation angle, and an azimuth angle are calculated based on the radius of the object, the center of the object, and pre-measured camera alignment values. The method further includes cropping the images to a smallest square that bounds the object and flattening the images from spherical representations to Cartesian representations. The method also includes converting the Cartesian representations to polar coordinates with a range of candidate centers of rotations. Based on a fit of the polar image pair, the spin axis and spin rate are measured.

主权项

1. A method of measuring launch parameters of an object in flight, the method comprising:
capturing a plurality of images of an object in flight; identifying a radius of the object and a center of the object in each of the plurality of images; calculating a velocity, an elevation angle, and an azimuth angle based on the radius of the object, the center of the object, and pre-measured camera alignment values; cropping the plurality of images to a smallest square that bounds the object; flattening the plurality of images from spherical representations to Cartesian representations; converting the Cartesian representations to polar coordinates with a range of candidate centers of rotation; and based on a fit of the polar image pair, measuring the spin axis and spin rate.