Indoor ball bounce tracking system

Abstract

An indoor ball landing point tracking system includes a predetermined landing area, a first image capturing device, a second image capturing device, and a processing device. This novel indoor ball landing point tracking system primarily utilizes two image capturing devices (cameras) to determine the position of an indoor ball (such as a badminton shuttlecock or pickle) that contacts the predetermined landing area, thus improving upon the inaccuracy of traditional single-camera systems. Furthermore, the two image capturing devices generate trigger flags based on the shuttlecock's movement, allowing users to pinpoint the exact time the shuttlecock touched the predetermined landing area based on the recording time indicated by the trigger flags, thus assisting users in quickly locating the desired image segment.

Claims

1. An indoor ball landing point tracking system for tracking and determining the landing point position (C2) of a ball (B) contacting a predetermined landing point area (1) to analyze the accuracy of a user (U) in practicing hitting the ball (B) into the predetermined landing point area (1), comprising: the predetermined landing point area (1) being set in an indoor sports field (F); a first image capturing device (2) being set in front of the predetermined landing point area (1) and located between the user (U) and the predetermined landing point area (1), wherein the image capturing range of the first image capturing device (2) is a first sensing range (R1); A second image capturing device (3) is disposed on one side of the predetermined landing area (1), and the image capturing range of the second image capturing device (3) is a second sensing range (R2); and a processing device (4) is signal-connected to the first image capturing device (2) and the second image capturing device (3). When the user (U) hits the ball (B) towards the predetermined landing area (1), when the ball (B) moves into the first sensing range (R1) of the first image capturing device (2), the processing device (4) generates a second trigger flag based on the plurality of images transmitted by the first image capturing device (2). Then, the ball (B) continues to move and enters the second sensing range (R2) of the second image capturing device (3), and the processing device (4)... At the moment the sphere (B) touches the predetermined landing area (1), a second trigger flag is generated. Then, the processing device (4) obtains the image of the sphere (B) captured by the first image capturing device (2) at the same time point based on a time point of the second trigger flag, and then determines the landing position (C2) of the sphere (B) in the predetermined landing area (1) based on the image at that time point.

2. The indoor ball landing point tracking system as described in claim 1 further includes a ball launcher (5), which is located on one side of the left and right sides of the predetermined landing point area (1) and on the other side corresponding to the second image capturing device (3).

3. The indoor ball landing point tracking system as described in claim 1 further includes a storage device (6) that is signal-connected to the processing device (4) and is used to store all images of the ball (B) captured by the first image capturing device (2) and the second image capturing device (3).

4. The indoor ball landing point tracking system as described in claim 1 further includes a predetermined serving area (7) located within the indoor sports field (F), and the user (U) strikes the ball (B) from the predetermined serving area (7) to the predetermined landing point area (1).

5. The indoor ball landing point tracking system as described in claim 4, wherein the first image capturing device (2) includes a first camera (21), and the bottom of one of the first cameras (21) is 40 cm to 50 cm away from a ground of the indoor sports field (F), and the position of the first camera (21) is 150 cm to 250 cm away from the predetermined serving area (7).

6. The indoor ball landing point tracking system as described in claim 5, wherein the first image capturing device (2) further includes a first bracket (22) on which the first camera (21) is mounted.

7. The indoor ball landing point tracking system as described in claim 5, wherein the second image capturing device (3) includes a second camera (31), one of the bottoms of which is 40 cm to 50 cm away from a ground surface of the indoor sports field (F).

8. The indoor ball landing point tracking system as described in claim 7, wherein the second image capturing device (3) further includes a second bracket (32) on which the second camera (31) is mounted.

9. The indoor ball landing point tracking system as described in claim 7, wherein the first camera (21) has a built-in first image processor (211) and the second camera (31) has a built-in second image processor (311).

10. The indoor ball landing point tracking system as described in claim 9, wherein the first image processor uses a Kalman filter to track the movement position of the ball (B) and transmits the tracking signal and the plurality of images to the processing device (4), so that the processing device (4) determines the time point at which the ball (B) enters the first sensing range (R1) based on the tracking signal and the plurality of images, and generates a first trigger flag; and the second image processor (311) uses a Gaussian mixture model (MOG OpenCV) to determine whether the ball (B) has contacted the predetermined landing point area (1), and then transmits the contact signal and the plurality of images to the processing device (4), so that the processing device (4) determines the time point at which the ball (B) has contacted the predetermined landing point area (1) based on the contact signal and the plurality of images, and generates the second trigger flag.

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