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A method of counting intelligent balls

A counting method and intelligent technology, applied in computing, computer components, instruments, etc., can solve problems such as sensor damage and affecting counting results

Inactive Publication Date: 2019-06-18
ZHEJIANG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The Chinese patent document with the notification number CN 205198858U discloses a smart ball with the function of counting the number of shots, and the Chinese patent document with the notification number CN205198855U discloses a smart ball toy. To improve itself, by installing sensors on the ball to achieve the purpose of accurate counting, it is very likely to cause damage to the sensor during the process of shooting the ball and affect the counting results

Method used

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  • A method of counting intelligent balls
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Experimental program
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Embodiment

[0085] see figure 1 , the intelligent racket ball counting method of the present embodiment comprises the following steps:

[0086] Obtaining step S1, obtaining the original video data (.avi) of the shooting action through the video recording device.

[0087] Extracting step S2, extract image data and audio data from original video data (.avi); And adopt the method for continuous wavelet transform to carry out filter processing to audio data:

[0088] A discrete time series x with equal time step δt n′ The continuous wavelet transform of (n′=1,…,N) is defined as the wavelet function ψ 0 scaled and transformed x n′ Convolution of:

[0089]

[0090] In the formula, Ψ is the wavelet function to be selected, * represents the conjugate complex number, N is the total number of data in the time series, is a factor used to standardize the wavelet function so that the wavelet function has unit energy at each wavelet scale s. By transforming the wavelet scale s and localizing ...

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Abstract

The invention discloses an intelligent ball-shooting counting method, which belongs to the technical field of body-building, and uses a high-definition video recording device (such as a smart phone, etc.) to record the entire process of shooting a ball from a certain angle, including the person shooting the ball. Then process the video and audio information separately, draw the height change image of the center pixel of the ball and the audio fluctuation map into the same coordinate system, and take the time frame as the horizontal axis, and judge the peak value of the audio waveform map after excluding natural bounce Whether it is within a shooting cycle, so as to judge whether it is a valid shooting. Using the mechanism analysis of senses such as vision and hearing, the fusion of video and audio information is used for judgment, so as to realize the automatic counting of racket balls and improve the accuracy. This method can realize automatic and accurate counting without using a special ball, not only can count immediately, but also can perform video playback. Especially with the widespread adoption of mobile video recording equipment, this method will have stronger practicability.

Description

technical field [0001] The invention relates to the technical field of fitness sports, in particular to an intelligent ball counting method. Background technique [0002] Playing the ball is a healthy activity for children. It can not only promote the coordination of children's hand-eye movements and enhance their physical fitness, but also promote the balance of the left and right brains, cultivate children's good qualities such as endurance and persistence, and are beneficial to children. The development of children's play has an important role to play, so kindergartens around the world often organize such competitions. However, in the process of shooting the ball, special personnel are required to count and count. There are a large number of children in the kindergarten, and counting each person will waste the precious time of the teacher; and sometimes when the speed of shooting the ball is fast or people are not concentrating, counting errors are prone to occur , there...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A63B71/06G06K9/00
CPCA63B71/06A63B2220/806A63B2220/17G06V20/42
Inventor 林峰王飞
Owner ZHEJIANG UNIV
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