JP2002017931A - 3d.pitching analyzer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus which enables analyzing of the details in pitching made by a pitcher by reading the track of the pitching with a three- dimensionally analyzable device to display the data to the pitcher in the training of pitching for pitchers in base ball. SOLUTION: In linkage with a stroboscopic light emitter (2) controlled by a projection stroboscopic emission controller (9), a ball (9) is photographed with a central camera (3), a left eye camera (4) and a right eye camera (5), and an image processor (6) performs a stereoscopic image processing of the track of the ball (9). The results in the pitching are displayed on a display device (1) while being stored into a personal computer (8) for processing data as data base thereby enabling the analyzing of the details in the pitching.

Description

DETAILED DESCRIPTION OF THE INVENTION

Conventionally, in baseball, the observation of pitching contents during the practice phase of a pitcher has been performed by visual observation using a pitching coach or the like. Its observation ability depends on the observer's experience, and its data analysis depends on the observer's ability. In addition, the pitcher who practices relies on knowing the pitching content intuitively based on the sound of the ball captured by the catcher.

In the practice of baseball pitching, the present invention accurately observes the pitching trajectory and speed of the pitcher at the position where the batter catches the ball (9), displays the data on the pitcher, and displays a data processing personal computer (8). ) Can be stored in the storage device to analyze the pitching content, the pitcher can check his pitching content, statistically correct pitching data can be obtained from the analysis results of the accumulated data, efficient training It is a device that can do it.

[0003] This device is equipped with a display device (1), a light emitting strobe device (2), a center camera (3), a left eye camera (4), and a right eye camera (5) at appropriate positions above the catcher. By doing so, a high-speed pitch trajectory exceeding 150 km / h can be read with high accuracy without hindering the pitching action of the pitcher and the catching action of the catcher, and the display device (1) can display the ball speed, strike, and ball of each pitch on the display device (1) in real time. The judgment result, the number of outs, and the like are displayed, pitching information is displayed to the pitcher, and pitching practice is assisted.

At the back of the apparatus, an image processing device (6) for processing a pitching speed and a trajectory from a captured image, a light emission strobe light emission control device (7), a data processing personal computer (8)
The training observer can analyze the pitching data.

[0005] The sphere (9) is imaged by the center camera 1, the left-eye camera 4, and the right-eye camera (5), and the three cameras simultaneously shoot the sphere (9) when the light-emitting strobe device (2) emits light. Take an image. By setting the light emission interval time [T] of the light emission strobe device (2) in advance in the light emission strobe light emission control device (7) in accordance with the ball speed of the pitcher who practices pitching, the number of images taken in the camera imaging range can be reduced. Can be controlled.
With this method, a high-speed imaging device can be economically constructed.

[0006] The measurement of the ball speed [V] is performed by capturing an image captured by the central camera (3) when the light-emitting strobe device (2) emits light as a continuous still image on the same screen, and moving the captured image of the ball (9). The amount [L] is calculated and calculated from the number of pixels on the screen by image processing. The time interval for imaging the sphere (9) can be made constant in advance by the light emission interval time [T] of the light emitting strobe device (2).

[0007] This apparatus is an apparatus for analyzing the trajectory of a three-dimensional pitch by an image processing device 6 using three cameras (3, 4, 5) provided above the catcher to determine a strike or a ball. . The trajectory of the plane sphere (9) is solved from the image captured by the central camera (3), and the height direction of the trajectory of the sphere is analyzed from the images captured by the left-eye camera (4) and the right-eye camera (5). Thus, the trajectory of the three-dimensional sphere (9) is analyzed.

The left-eye camera (4) and the right-eye camera (5) are mounted at a predetermined distance [D], and the left camera (4) and the right-eye camera (5) take images when the light-emitting strobe device (2) emits light. As a continuous still image of the same screen. The difference (dn) in the position of the sphere (9) is obtained by superimposing the images of the left-eye camera (4) and the right-eye camera (5). From the difference (dn) between the positions of the spheres, the position in the height direction of the sphere (9) is calculated to obtain a locus of the height.

A pitch determination area is set in a coordinate axis program of a data processing personal computer (8) for analyzing three-dimensional data, and a strike occurs when the trajectory of the sphere (9) passes inside the three-dimensional coordinates. Discrimination, and the rest as balls. The discrimination result is displayed on the display device (1) and stored in the data processing personal computer (8) as a data base so that the contents of the pitch can be analyzed.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an apparatus.

FIG. 2 is a trajectory of a sphere captured by a central camera.

FIG. 3 is a trajectory of a sphere captured by a left-eye camera and a right-eye camera.

FIG. 4 is an image obtained by superimposing images of a sphere captured by a left-eye camera and a right-eye camera.

FIG. 5 is a positional relationship between a camera and a sphere.

FIG. 6 is a trajectory of a sphere in a height direction.

FIG. 7 shows a pitch determination area and a trajectory of a ball.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Light emission strobe device 3 Central camera 4 Left eye camera 5 Right eye camera 6 Image processing device 7 Light emission strobe light emission control device 8 Data processing personal computer 9 Ball

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Claims (2)

[Claims] 1. In baseball pitching practice in baseball, a trajectory of the pitch is read by a device capable of three-dimensional analysis, the data is displayed to the pitcher, and data enabling analysis of the pitcher's pitching content is collected. Equipment to do. 2. A three-dimensional visualization device capable of capturing an image of a trajectory of an object passing at a high speed with a camera (3, 4, 5) from above and analyzing the trajectory of the object as three-dimensional data.