Title:
METHOD FOR MEASURING SPEED OF THROWN OBJECT AND SYSTEM FOR MEASURING SPEED OF THROWN OBJECT
Document Type and Number:
WIPO Patent Application WO/2024/024161
Kind Code:
A1
Abstract:
[Problem] To provide a method for measuring speed that makes it possible to simply and easily measure the speed of a thrown object at any position without the need for special equipment. [Solution] A method for measuring the speed of a thrown object 20 on the basis of a throwing video taken from one side, the method being characterized to include: a step for determining a moving object detection area by selecting a movement location of the thrown object 20 within a prescribed range after being thrown, from the throwing video; a moving object detection step for identifying an object that moves linearly within the moving object detection area as the thrown object 20; a tracking step for detecting the trajectory of the thrown object 20 for each frame in the throwing video on the basis of the result of the moving object detection step; and a speed estimation step for calculating the speed of the thrown object 20 on the basis of the number of pixels in the throwing video, a known actual value in the throwing video, and the elapsed time.
Inventors:
YAMAZAKI TAICHI (JP)
TOKUDA MASARU (JP)
TOKUDA MASARU (JP)
Application Number:
PCT/JP2023/010706
Publication Date:
February 01, 2024
Filing Date:
March 17, 2023
Export Citation:
Assignee:
CAR MATE MFG (JP)
International Classes:
G01P3/36
Foreign References:
| JP2017091092A | 2017-05-25 | |||
| US20150260512A1 | 2015-09-17 | |||
| JP2008545194A | 2008-12-11 | |||
| JP2005159674A | 2005-06-16 | |||
| JP2002202317A | 2002-07-19 |
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