Abstract

An online dart competition system including at least two mobile devices having a first and a second image capturing module, configured to capture an dart player image and a dartboard image, respectively; a mirror to reflect/redirect the dartboard image; a wireless transmission module, configured to transmit a score, the dart player image, and the dartboard image to the other mobile device and to receive a score, image, and a dartboard image of a competitor from the other mobile device; and a processor. The processor executes an application and displays the scores and at least two images of the dart player image, the dartboard image, the competitor image, and the competitor dartboard image on a display in a split-screen interface. Thus, the at least two images may be viewed by players during the online competition.

IPC Classes  ?

• F41J 3/00 - Targets for arrows or darts, e.g. for sporting or amusement purposes
• F41J 5/052 - Targets comprising a plurality of electric contacts, each corresponding to a discrete target section and being actuated by the movement thereof
• F41J 3/02 - Indicators or score boards for arrow or dart games

Abstract

A calibration method for a camera which monitors a target board is disclosed, comprising steps: using the camera to capture a target image corresponding to the target board; using rotation and translation to align the target image to a reference standard and acquire the corresponding relationship of the target image and the target board; defining a region of interest above the target image; using at least one positioning marker in at least two positions of the target board, whose actual space coordinates are known, and using the camera to acquire at least two image coordinates of the positioning markers in the region of interest; and using the known actual space coordinates and the acquired image coordinates to work out the exact position of the camera. Thereby, the positions of the cameras can be used to correctly determine the positions of darts.

IPC Classes  ?

• G06T 7/80 - Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
• F41J 5/10 - Cinematographic hit-indicating systems
• F41J 5/02 - Photo-electric hit-detector systems
• G06T 7/11 - Region-based segmentation
• G06T 7/73 - Determining position or orientation of objects or cameras using feature-based methods
• A63B 67/06 - Ring or disc tossing games
• A63F 9/02 - Shooting or hurling games
• G06T 3/20 - Linear translation of a whole image or part thereof, e.g. panning
• G06T 3/60 - Rotation of a whole image or part thereof

Abstract

An automatic scoring dart target device and a method of using the same are provided. The device includes a dart target, a plurality of image capturing units, a background-shield and a processor. The dart target is made of solid material on which darts are shot. The image capturing units and the dart target are disposed on the same surface. The image capturing units respectively capture a plurality of images at intersecting directions. The background shield is disposed relative to the image capturing units so that the image capturing units can generate the background information. The processor calculates the scores based on the background information and locations of the dart in a selection of two images among the plurality of images individually captured by the corresponding plurality of image capturing units. Thus, the scores of landed darts can be automatically calculated when using the conventional dart target.

IPC Classes  ?

• F41J 3/02 - Indicators or score boards for arrow or dart games
• F41J 3/00 - Targets for arrows or darts, e.g. for sporting or amusement purposes
• F41J 5/02 - Photo-electric hit-detector systems