Device and method for sensing movement of sphere moving on plane surface using camera, and device and method for sensing golfball moving on putting mat

A method for sensing a sphere moving on a plane, comprising:

• acquiring an image by a single camera at an angle of view including the plane on which the sphere moves in a single view at an arbitrary position;
• setting a position relationship between the single camera and a reference surface that is the plane on which the sphere moves from the image acquired by the single camera;
• detecting a feature point on an outline of an object corresponding to the sphere on the acquired image;
• and
• calculating a position coordinate of a point where a center point of the sphere is projected vertically to the reference surface using the feature point and the set position relationship as the coordinate of the position on the reference surface of the sphere.

A sensing method for sensing a golf ball moving on a putting mat, comprising:

• acquiring an image by a single camera at an angle of view including the putting mat on which the golf ball moves in a single view at an arbitrary position;
• setting a position relationship between the single camera and a reference surface that is a plane of the putting mat from the image acquired by the single camera;
• performing ready to sense to detect an object corresponding to the golf ball on the image acquired by the single camera;
• detecting hitting the golf ball from the image acquired by the single camera;
• calculating a position coordinate of a point where a center point of the golf ball is projected vertically to the reference surface using a point on an outline of the object and the set position relationship as a coordinate of a position on the reference surface of the golf ball;
• and
• calculating information on movement of the golf ball according to changes of the coordinate of the position on the reference surface of the golf ball.