Method and apparatus for sensing moving ball

Abstract

Provided are an apparatus and method for sensing a moving ball, which extract a feature portion such as a trademark, a logo, etc. indicated on a ball from consecutive images of a moving ball, acquired by an image acquisition unit embodied by a predetermined camera device, and calculate a spin axis and spin amount of rotation the moving ball based on the feature portion and thus spin of the ball is simply, rapidly, and accurately calculated with low computational load, thereby achieving rapid and stable calculation of the ball in a relatively low performance system. The sensing apparatus includes an image acquisition unit for acquiring consecutive images, an image processing unit for extracting a feature portion from the acquired image, and a spin calculation unit for calculating spin using the extracted feature portion.

Description

TECHNICAL FIELD[0001]The present invention relates to a method and apparatus for sensing a moving ball for acquiring an image of the moving ball and processing and analyzing the image to calculate the spin of the ball.BACKGROUND ART[0002]With regard to sports games, specifically, golf, attempts have always been made to accurately sense the physical characteristics of a moving ball that is hit by a golfer, to analyze the ball in flight or to realize the ball in flight in the form of an image using the sensed value, and to apply the result to simulated golf such as so-called screen golf.[0003]In particular, when a ball is hit to fly, the ball rotates at very high speed with respect to an axis in a three-dimensional space, and thus, it is very difficult to measure spin of the ball and very expensive equipment is required to accurately measure the spin of the ball. A representative method for measuring spin of a ball is a method using a radar sensor.[0004]However, such an expensive sens...

AI Technical Summary

Benefits of technology

[0010]An apparatus and method for sensing a moving ball according to the present invention may extract a feature portion such as a trademark, a logo, etc. indicated on a ball from consecutive images of a moving ball, acquired by an image acquisition unit embodied by a predetermined camera device, and calculate a spin axis and spin amount of rotation the moving ball based on the feature portion and thus spin of the ball is simply, rapidly, and accurately calculated with low computational load, thereby achieving rapid and stable calculation of the ball in a relatively low performance system.

Problems solved by technology

In particular, when a ball is hit to fly, the ball rotates at very high speed with respect to an axis in a three-dimensional space, and thus, it is very difficult to measure spin of the ball and very expensive equipment is required to accurately measure the spin of the ball.

However, such an expensive sensing apparatus is not appropriate for a general-purpose sensing apparatus for analysis of a ball in flight in so-called screen golf or on a driving range, which senses a ball in flight according to golf swing, calculates a trajectory of the ball, and allows golf simulation on a virtual golf course based on the calculated trajectory.

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