Patent ID: 8761441
Filing Date: 2014-06-24
Classification: G06T

Abstract:
1. A method for measuring flight information of a spherical object having a pattern with a stereo camera, the method comprising: generating a motionless background image using the stereo camera; removing the background image from each image photographed by the stereo camera to extract a foreground image including the spherical object; extracting a pixel cluster of the foreground image that is interconnected pixels from the pixels corresponding to the foreground image; extracting a pixel cluster of the spherical object that is the pixel cluster corresponding to the spherical object from the pixel cluster of the foreground image, based on the size of the pixel cluster of the foreground image; extracting centroids of the spherical object and a spherical object region using the pixel cluster of the spherical object; extracting at least three features of the spherical object by analyzing a change in image brightness within the extracted spherical object region; and measuring flight information of the spherical object based on the extracted centroid and features.