Method and apparatus for calculating position of dart pin

Patent metadata

Field	Value
Publication number	US-12125232-B2
Application number	US-202217693964-A
Country	US
Kind code	B2
Filing date	Mar 14, 2022
Priority date	Mar 15, 2021
Publication date	Oct 22, 2024
Grant date	Oct 22, 2024

Abstract

A method for calculating a position of a dart pin attached to a dart board divided into a plurality of segments in an apparatus for calculating a position of a dart pin is provided. The method includes obtaining a plurality of optical data from a plurality of optical devices corresponding to at least one of a plurality of holes formed in each segment and installed on the rear surface of the dart board; and calculating a position of a dart pin attached to the dart board using the plurality of optical data.

First claim

What is claimed is:

1. A method for calculating a position of a dart pin attached to a dart board divided into a plurality of segments, the method comprising:
obtaining a plurality of optical data from a plurality of optical devices corresponding to at least one of a plurality of holes formed in each segment and installed on the rear surface of the dart board; and
calculating a position of a dart pin attached to the dart board using the plurality of optical data,
wherein the dart board is fixed to a backboard, and the plurality of optical devices are installed to face the rear surface of the dart board in a space between a rear surface of the dart board and the backboard.

2. The method of claim 1 , wherein the optical data includes image data or optical data.

3. The method of claim 2 , wherein the calculating of a position of a dart pin includes:
checking whether there is an image change between two images by comparing each of a plurality of images obtained from a plurality of cameras with the previous image obtained from a plurality of cameras, respectively;
when the brightness of an area where the image change occurs is darkened, determining that the dart pin is attached and calculating the position of the area; and
outputting a score corresponding to the position of the area.

4. The method of claim 3 , wherein the calculating of a position of a dart pin further includes determining that the dart pin is detached when the brightness of the area where the image change occurs becomes brighter.

5. The method of claim 3 , wherein a light emitting device is attached to the end of the dart pin, and
the calculating of a position of a dart pin further includes determining that the dart pin is attached when the brightness of the area where the image change occurs becomes brighter.

6. The method of claim 3 , wherein the calculating of the position of the area includes calculating a position set corresponding to a camera that has photographed an image including the area as the position of the area.

7. The method of claim 2 , wherein the calculating of a position of a dart pin includes:
checking whether there is a brightness change by comparing each optical signal obtained from each optical sensor corresponding to each hole with the previous optical signal obtained from each optical sensor;
if the brightness is changed from bright to dark, determining that the dart pin is attached and calculating a position of the hole changed from bright to dark; and
outputting a score corresponding to the position of the hole.

8. The method of claim 7 , wherein the calculating of a position of a dart pin further includes determining that the dart pin is detached when the brightness is changed from dark to bright.

9. The method of claim 7 , wherein a light emitting device is attached to the end of the dart pin, and
the calculating of a position of a dart pin further includes determining that the dart pin is attached when the brightness is changed from dark to bright.

10. An apparatus calculating a position of a dart pin attached to a dart board divided into a plurality of segments, the apparatus comprising:
a plurality of optical devices that correspond to at least one of a plurality of holes formed in each segment and installed to face the rear surface of the dart board, and generate a plurality of optical data; and
a position calculator that calculates a position of the dart pin attached to the dart board using the plurality of optical data,
wherein the dart board is fixed to a backboard, and the plurality of optical devices are installed to face the rear surface of the dart board in a space between a rear surface of the dart board and the backboard.

11. The apparatus of claim 10 , wherein the optical device includes a camera.

12. The apparatus of claim 11 , wherein the position calculator that compares each image obtained from the plurality of optical devices with a previous image obtained from the plurality of optical devices, detects the area to which the dart pin is attached from the change in brightness between the two images, and calculates the position of the area.

13. The apparatus of claim 12 , wherein the position calculator determines that the dart pin is attached when the brightness between the two images is changed from bright to dark.

14. The apparatus of claim 12 , wherein a light emitting device is attached to the end of the dart pin, and
the position calculator determines that the dart pin is attached when the brightness between the two images is changed from dark to bright.

15. The apparatus of claim 10 , wherein the optical device includes an optical sensor, and each optical sensor is installed in a one-to-one correspondence with each hole.

16. The apparatus of claim 15 , wherein the position calculator compares each optical signal detected from the plurality of optical devices with the previous optical signal detected from the plurality of optical devices, detects the area to which the dart pin is attached from the change in brightness between the two optical signals, and calculates the position of the area.

17. The apparatus of claim 16 , wherein the position calculator determines that the dart pin is attached when the brightness of the two optical signals is changed from bright to dark.

18. The apparatus of claim 16 , a light emitting device is attached to the end of the dart pin, and
the position calculator determines that the dart pin is attached when the brightness of the two optical signals is changed from dark to bright.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Kim Do Hyung

Classifications

• H04N23/71

  Circuitry for evaluating the brightness variation · CPC title

• F41J3/02

  Indicators or score boards for arrow or dart games {(F41J5/00 takes precedence; timetables, lists or forms for shooter enlistment B42D15/0066)} · CPC title

• F41J5/08

  Infrared hit-indicating systems · CPC title

• F41J5/02

  Photo-electric hit-detector systems {(comprising a light-emitting device for simulating the firing of a gun F41G3/2622; detecting by optical means G01V8/10)} · CPC title

• A63F9/0208

  the projectile being connectable to the target, e.g. using hook and loop-type fastener, hooks · CPC title