JP2014126242A - Target device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a cost reduction of a target device used in a gunshot competition using a light beam gun.SOLUTION: A target device A is constituted such that it comprises a target 11 having a center point O and score bands spreaded in a form of concentric circular pattern from the center point O, a housing 1 in which an optical bullet launched from a light beam gun impacts against the target 11 houses a camera 2 for photographing a prescribed number of photos per one second of images including the target 11 and a unit PC3 for arithmetic computation of a game, the PC3 selects, through selecting means, the image of impact point including an impact point Z where the light bullet impacts against the target 11, specifies positions of the impact point Z included in the impact point image and the center point O of the target 11 by impact point coordinate specifying means and center point coordinate specifying means, calculates a distance between the impact point Z and the center point O of the target by distance calculating menas and the score is calculated and arithmetically computed by score calculating means in reference to this distance value.

Description

  The present invention relates to a target device used in a shooting competition using a light gun, and more particularly to a target device capable of calculating an accurate score of a light bullet that has been driven into a target without making manufacturing precision severe.

  In Japan, which is subject to strict regulations under the Control Law for possession of guns, swords, etc., shooting using a light gun has been promoted and popularized as a sport that anyone can enjoy easily without requiring permission for possession etc. . As a result, the shooting competition with a light gun has become one of the official events of the National Sports Festival (National Sports), and recently, a laser pistol, a type of light gun, has been introduced in the shooting events of the modern five-class competition.

  In a shooting competition using a light gun, a target device having a function of accurately identifying the position of a light bullet fired from a light gun on the target and calculating its score is required. The applicant has so far developed a high-performance electronic target device applicable to shooting using a light gun, and has proposed in Patent Document 1 below. Patent Document 2 below proposes an invention relating to a target position adjustment method for a shooting system that contributes to improving the accuracy of specifying the position of the landing point of a light bullet.

  In order to accurately specify the position of the landing point of the light bullet, it is important to precisely measure the landing coordinates of the light bullet on the target set in the target device, as described in Patent Document 2 below. is there. In order to accurately measure the landing coordinates, it is important to precisely adjust the relative positional relationship between the target surface and the photoelectric conversion surface before the start of the competition. For this reason, for example, the arrangement position of the CCD linear image light receiving sensor with respect to the target surface as described in Patent Document 1 described below coincides with the coordinates on the photoelectric conversion surface of the mechanical coordinate system and the CCD linear image light receiving sensor. Therefore, there is a strict requirement that the error must be within 1 mm.

Japanese Patent No. 3496064 JP 2003-38865 A

  Therefore, since the production accuracy of the conventional target device is severe, special parts for maintaining the accuracy, specialized engineers, etc. are necessary, or a special method as proposed in Patent Document 2 is necessary. As a result, the cost tends to increase. Further, in the target device described in Patent Document 1 below, since it is necessary to arrange the CCD linear image light receiving sensor in a cross and to measure the position of the outside of the light bullet that has landed on the target surface, the target 3 is vertically and horizontally. There is also a problem that the size of the housing that accommodates the target and the CCD linear image light receiving sensor becomes large because double size is required.

  The present invention has been proposed in view of the above circumstances, can calculate the exact score of the light bullets that are driven into the target without severe manufacturing accuracy, can reduce the housing size, and An object of the present invention is to provide a target device capable of reducing the manufacturing cost.

  In order to achieve the above object, a target device according to the present invention includes a target in which a center point and a score band extending concentrically from the center point are arranged, and a light bullet emitted from a light gun lands on the target. A body, optical system photographing means for photographing a predetermined number of images including the target per second, and a landing point image including a landing point where the light bullet has landed on the target is selected from the image; And calculating means for determining a position on the image of the landing point and the center point of the target included in the landing point image, and calculating a score based on the position on the image.

  In particular, the computing means obtains the center of gravity of the landing point included in the landing point image by selecting only the landing point image through the binarization conversion operation of data from the image, and determines the center of the landing point on the image of the landing point. Landing point coordinate specifying means for specifying landing point coordinates that are positions of the target, center point coordinate specifying means for specifying center point coordinates that are positions on the image of the center point of the target, the landing point coordinates and the center point It is characterized by comprising distance calculation means for calculating the distance between the coordinates and score calculation means for calculating the score based on the distance.

  The target device according to the present invention specifies a position on the image of the landing point and the center point of the target included in the landing point image photographed by the optical system photographing unit, and calculates a score based on the position on the image It is the structure provided with a means. Therefore, it is not necessary to measure the outside of the landing point of the light bullet that has landed on the target as in the conventional case, and the housing size can be reduced. Theoretically, a housing size that is the same size as the target diameter can be achieved. In particular, the position of the landing point and the position on the target are specified from the landing point image, and the score is calculated based on the position on the image. Therefore, it is necessary to match the coordinates on the photoelectric conversion surface with the mechanical coordinate system. Therefore, the accuracy of the position where the optical system photographing means is installed in the housing can be relaxed. Specifically, the installation accuracy of the optical system photographing means can be relaxed to about 5 mm, and a general-purpose product can be used. As long as it has a function of photographing a predetermined number of images per second, the optical system photographing means can be constituted by a commercially available one (for example, a commercially available CCD camera or CMOS camera), and further cost reduction is achieved. You can also.

  In the present invention, the calculation means includes a selection means for selecting only the landing point image, a landing point coordinate specifying means for specifying the landing point coordinates, a center point coordinate specifying means for specifying the center point coordinates, the landing point coordinates and the center It is the structure provided with the distance calculation means which calculates the distance between point coordinates, and the score calculation means which calculates a score. Therefore, since no special calculation is required, the manufacturing cost can be further reduced.

It is the schematic explanatory drawing which showed the outline of the structure of the target apparatus which concerns on this invention. It is principal part explanatory drawing which looked at the cross section of the target apparatus of FIG. 1, and showed the principal part. It is a flowchart explaining the whole operation | movement of the target apparatus which concerns on this invention.

  Hereinafter, an embodiment of a target device according to the present invention will be described with reference to the drawings. The embodiment described below is merely an example embodying the configuration of the present invention, and the design can be changed without departing from the matters described in the claims.

  As shown in FIGS. 1 and 2, the target device A according to the present invention includes a center 11 and a target 11 in which score bands extending concentrically from the center point O are arranged, and the target 11 is launched from a light gun. A camera 2 (see FIG. 2) as an optical system photographing unit having a function of photographing a predetermined number of images including the target 11 per second, for example, 30 images per second, on the case 1 on which the light bullet lands. The landing point image including the landing point Z where the light bullet has landed on the target 11 is selected from the images taken by the camera 2, and the landing point Z and the center point O of the target 11 included in the landing point image are selected. A personal computer (hereinafter referred to as “PC”) 3 serving as computing means for specifying the upper position and calculating a score based on this position is accommodated. The output of the PC 3 is connected to the printer 4 outside the housing 1.

  As the camera 2, a so-called digital camera including a solid-state imaging device which is a semiconductor device widely used in video cameras such as a CCD image sensor and a CMOS image sensor can be adopted. Also, depending on the focal position of the lens and the shootable range, the camera 2 is, for example, 100 to 400 mm behind the target 11 and the deviation between the center of the lens and the center point O of the target is up and down, left and right, It is allowed up to about 5 mm in all front and rear directions. As a result, the entire target 11 is necessarily included in the image captured by the camera 2 and an accurate score can be calculated by the PC 3 as will be described later. The image taken by the camera 2 is preferably in color.

  The PC 3 captures an image captured by the camera 2 and selects only the landing point image including the landing point Z where the light bullet has landed on the target 11 through the binarization conversion operation of the data, and the landing point image The center of gravity of the included landing point Z is obtained, and the landing point coordinate specifying means for specifying the landing point coordinates (gX, gY), which is the position on the image of the landing point Z, and the position of the center point O of the target 11 on the image. A center point coordinate specifying means for specifying a certain center point coordinate (sX, sY), a distance calculating means for calculating a distance between the landing point coordinates (gX, gY) and the center point coordinates (sX, sY), and a distance Score calculating means for calculating a score based on the distance calculated by the calculating means. Specifically, the PC 3 is provided with a program used for the processing, and various means are executed by the program. The camera 2 and the PC 3 are connected by a wired or wireless connection such as a USB cable, for example.

  In the present embodiment, a configuration in which the PC 3 is accommodated in the housing 1 will be described. However, as long as the calculation means includes the various means described above, a predetermined place outside the housing 1, for example, at a competition or the like. An arithmetic means such as a personal computer placed on the computer can be used. The score calculated by the score calculation means is printed by the printer 4 outside the housing 1 connected through the output of the PC 3 so that the player can know it. In addition, the target device according to the present invention can visually present the position of the light bullet landed on the target to the player by being connected to a known display (not shown).

  Hereinafter, operation steps that proceed based on various means provided in the PC 3 will be specifically described with reference to FIG. First, when the power of the PC 3 is turned on, an image taken by the camera 2 is taken into the PC 3 from the camera 2 connected by USB or the like (S1: Step 1). Note that the number of pixels of the camera 2 employed in the present embodiment is 1280 × 960 dots. The camera 2 captures 30 color images per second. The light bullet is a pulse emission of 50 mS, and a red laser is used.

  Next, the binarization of the data about the captured image is performed by the selecting means, and it is selected whether or not the landing point Z is included in the captured image. Since the image captured by the camera 2 is color, it is specifically selected based on a program language such as [Equation 1] below.

  That is, the sorting means measure the brightness (size) of R (red), G (green), and B (blue) colors for each dot of the captured image (data). The number of light-emitting points is checked as to whether the dots are emitting light. For each measured dot of R, G, and B, if R has a brightness of a predetermined value or more (for example, 200 or more) and G and B are inferior in brightness to R, the dot is emitted as emitting light. Added to the number of points. In other cases, the dot is not added and is not added to the number of emission points (S2: Step 2).

  As a result, when the number of light emitting points becomes 5000 or more, it is selected that there is a light emitting point (that is, a landing point image). When the number of light emitting points is less than 5000, it is selected that there is no light emitting point (that is, not a landing point image), and the process returns to Step 1 (S3: Step 3). In the present embodiment, since the diameter of the light bullet on the target 11 is about 60 mm, one reference for determining that 0.4% or more of all the dots emit light is a landing point image. It can be specified that

  When a predetermined image is selected as a landing point image by the selection unit, the diameter of the landing point Z on the landing point image is compared with a predetermined value inputted in advance in the PC 3 (comparison unit). As a result, if it is within a predetermined error range, it is determined as a landing point Z based on the light bullet emitted from the light gun. When it is out of the range, it is determined that the light bullet emitted from the light gun has not landed, and the process returns to step 1 (S4: step 4). Step 4 excludes the case where unexpected light enters the target 11 (shooting range of the camera 2) for some reason, and excludes this, and the landing point image including light based on the light bullet emitted from the light gun This is an operation for extracting only the score and contributes to accurate score calculation.

  Subsequently, with respect to the landing point image determined to include the landing point Z based on the light bullet emitted from the light gun through step 4, the landing point coordinates (the center of gravity of the landing point Z) by the landing point coordinate specifying means ( gX, gY) is specified on the image. The center of gravity calculation is generally obtained from the primary moment and area in the X and Y axis directions of the landing point image, so the primary moment in the X and Y axis directions is the following [Equation 2], and the area is the number of dots of the light emitting point. If M is M, the landing point coordinates (gX, gY) can be expressed by the following [Equation 3].

  Based on these [Equation 2] and [Equation 3], the first moment in the X-axis direction is the following [Equation 4], the first moment in the Y-axis direction is the following [Equation 5], and the area is the following [Equation 6]. Can be expressed based on such a programming language.

  The first moment in the X-axis direction is calculated by adding all of the Y coordinate values (0 to 960) for the dots whose light emission point value is 1 assuming that light is emitted after binarization with respect to the landing point image. Is done. Further, with respect to the landing point image, the first moment in the Y-axis direction is obtained by adding all the X coordinate values (0 to 1280) of the dots whose light emission point value is 1 assuming that light is emitted after binarization. Is calculated. Then, the landing point coordinates (gX, gY) are specified by these first moments and M, which is the number of dots of light emitting points, which are areas (S5: Step 5).

  In parallel with the specification of the landing point coordinates (gX, gY), the center point O of the target 11 photographed with respect to the landing point image is searched by the center point coordinate specifying means, and the position on the image is the center point. It is specified as coordinates (sX, sY) (S5: Step 5).

  When the landing point coordinates (gX, gY) and the center point coordinates (sX, sY) are specified, the distance calculation unit obtains the distance between these coordinates. The distance is a linear distance between the landing point coordinates (gX, gY) and the center point coordinates (sX, sY), and the distance between dots in the X and Y axis directions (constant; 0.0957 mm in this embodiment). In addition, the calculation is performed based on the programming language as shown in the following [Equation 7] based on the three-square theorem (S6: Step 6).

  Finally, a score is calculated by the score calculation means based on the distance calculated by the distance calculation means. In the calculation of the landing point Z, according to the rules of shooting competition using a light gun, every time the distance from the center point O of the target 11 is 0.8 mm, the score is reduced by 0.1 point. The calculation is based on a program language such as [Equation 8].

  As shown in [Equation 8], when the number obtained by subtracting 0.8 from the distance value calculated by the distance calculating means is a positive value (plus), 0.1 from the perfect score (10.9) is 0.1. Be drawn. Subsequently, 0.8 is subtracted from the number obtained by subtracting 0.8 from the distance value calculated by the distance calculating means, and when the number is a positive value (plus), 0.1 is calculated from the perfect score. Further subtract 0.1 from the subtracted value 10.8. This calculation is repeated until 0.8 is zero or a negative value (minus) until a score is calculated. That is, a point obtained by subtracting 0.1 from 10.9, which is the perfect score, is calculated as the score, as many times as subtraction of subtracting 0.8 from the distance value calculated by the distance calculating means is performed. (S7: Step 7). When the number obtained by subtracting 0.8 from the distance value calculated by the distance calculating means is zero (zero) or a negative value (minus), the score is a perfect score (10.9). The score calculated by the score calculation means is transmitted to the printer 4 (S8: Step 8). When the display is connected, the landing point coordinates (gX, gY) are transmitted together.

  Therefore, the target device A according to the present invention specifies the positions (landing point coordinates and center point coordinates) on the image of the landing point Z and the center point O of the target 11 included in the landing point image captured by the camera 2, Since the PC 3 for calculating the score based on this position is provided, there is no need to measure the outside of the impact point Z of the light bullet as in the conventional case, and the housing size can be reduced. Furthermore, the accuracy of the installation position of the camera 2 in the housing 1 can be relaxed to about 5 mm in the vertical and horizontal directions and the front and rear direction. The camera 2 is commercially available and can constitute the present invention, and the cost can be reduced. Since no special calculation is performed by the PC 3, the target device A according to the present invention can further reduce the manufacturing cost.

  The present invention has been described in detail with respect to one of the embodiments that the applicant believes to be the best. However, the present invention is not limited to the above-described embodiment unless departing from the scope of the claims. Various design changes can be made without this. For example, a well-known facility, a well-known means, etc. about the housing | casing which comprises the target apparatus based on this invention, and its target are employable. As described above, the optical system photographing means is not limited to the number of pixels and the like, and a commercially available one can be adopted. Since the number of images taken per second can be defined from the relationship with the emission time of pulsed light, it can be adjusted as appropriate. Instructions (programs) for the electronic computer can also be changed and customized as appropriate without solving the problems of the present invention and without departing from the matters described in the claims.

  In the above-described embodiments, the target device for the pulsed red laser beam gun is mainly described. However, various types of light beams can be used as long as they do not depart from the scope of the claims. It can be applied as a gun target device.

A. Target device (present invention)
1 ・ ・ Housing 11 ・ Target 2 ・ ・ Camera (Optical system photographing means)
3. ・ PC (calculation means)
4 .. Printer O ... Center point Z ... Landing point S1-S8 ... Step 1-Step 8

Claims (2)

A case in which a center point and a target lined with a score band extending concentrically from the center point are arranged, and a light bullet fired from a light gun lands on the target;
Optical system photographing means for photographing a predetermined number of images including the target per second;
From the image, a landing point image including a landing point where the light bullet has landed on the target is selected, and the position of the landing point included in the landing point image and the center point of the target is specified on the image. Calculating means for calculating a score based on the position on the image;
A target device comprising: The computing means is
A selection means for selecting only the landing point image through a binarization conversion operation of data from the image;
A landing point coordinate specifying means for obtaining a center of gravity of the landing point included in the landing point image and specifying a landing point coordinate which is a position on the image of the landing point;
Center point coordinate specifying means for specifying a center point coordinate which is a position on the image of the center point of the target;
A distance calculating means for calculating a distance between the landing point coordinates and the center point coordinates;
Score calculating means for calculating a score based on the distance;
The target device according to claim 1, comprising:

Images