TWI875620B - Automatic scoring dartboard device and dartboard automatic scoring method - Google Patents

Abstract

An automatic scoring dartboard device and a dartboard automatic scoring method. The automatic scoring dartboard device includes a dartboard, a plurality of optical capture modules, and a control circuit. When a first dart was thrown at the dartboard, these optical capture modules capture the dartboard to obtain a plurality of images to be scored. The control circuit compares these images which to be scored with a plurality of reference images to determine the position of the first dart, and was based on these positioning marks on the non-scoring zone of the dartboard to determine a score zone of the position of the first dart, and obtain a first dart score correspond to the score zone, and then statics each first dart score to generate a real first dart score.

Description

Automatic scoring target device and target automatic scoring method

The present invention relates to an automatic scoring target device, and more particularly to an automatic scoring target device capable of reducing dart scoring errors.

The existing dart target must be identified by a person who can identify the scoring area where the dart lands and determine the score in the scoring area to calculate the result of the dart game. It takes a long time to calculate the score by a person. When using an electronic target with an automatic scoring function, the camera angle of the scoring lens is limited, which often causes scoring errors.

How to improve the imaging device and image processing so that images acquired from different angles can improve the accuracy of determining the landing point of the dart and overcome the above-mentioned defects has become one of the important issues that this industry wants to solve.

The technical problem to be solved by the present invention is to provide an automatic scoring target device that can reduce the error in judging the landing point of the dart in view of the shortcomings of the existing technology. Images obtained at different angles can improve the accuracy of judging the landing point of the dart.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide an automatic scoring target device, which includes a target, a plurality of optical capture modules and a control circuit. The target includes a target area with a plurality of scoring areas and a non-scoring area, the plurality of scoring areas correspond to a plurality of different scores, and the non-scoring area is provided with a plurality of positioning marks. The plurality of optical capture modules are arranged around the target and are configured to capture a plurality of images to be scored of the target area when a first dart is located on the target. The control circuit is configured to compare the plurality of images to be scored with the plurality of reference images to determine a first dart position, and to use one or more of the positioning marks in the images to be scored as a reference to determine the scoring area corresponding to the first dart position and obtain a first dart score, and then to count each of the first dart scores obtained to generate a true first dart score.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a method for automatic scoring of a target, which includes: providing a target, including a target area with multiple scoring areas and a non-scoring area, the multiple scoring areas correspond to different multiple scores, and the non-scoring area is provided with multiple positioning marks, and multiple optical capture modules are arranged around the target. In response to a first dart being located on the target, a control circuit controls the multiple optical capture modules to capture multiple images to be scored from the target area. The control circuit performs the following steps: comparing a plurality of the images to be scored with a plurality of reference images to determine the first dart position; using one or more positioning marks in the images to be scored as a reference to determine the scoring area corresponding to the first dart position, and obtaining a first dart score. Each of the first dart scores obtained is statistically calculated to generate a real first dart score.

One of the beneficial effects of the present invention is that the automatic scoring target device and the automatic target scoring method provided by the present invention can obtain the real first dart score through the technical solutions of "optical capture modules at different positions capture images to be scored" and "control circuits compare and count images to be scored".

The present invention can solve the problem of dart landing point judgment errors caused by blind spots in images captured by a single optical capture module by comparing the images to be scored obtained by optical capture modules at different positions, thereby improving the accuracy of dart landing point judgment.

The control circuit compares the image to be scored with the previous frame image to determine the position of the dart. The control circuit corrects the scoring area in the image to the same shape as the reference image, and then compares to obtain the difference, which can reduce the data processing amount of image processing and shorten the image processing time.

To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only used for reference and description and are not used to limit the present invention.

The following is an explanation of the implementation of the "automatic scoring target device" disclosed in the present invention through specific concrete embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without deviating from the concept of the present invention. In addition, the drawings of the present invention are only for simple schematic illustrations and are not depicted according to actual sizes. Please note in advance. The following implementation will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

It should be understood that, although the terms "first", "second", "third", etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" used herein may include any one or more combinations of the associated listed items depending on the actual situation.

FIG1 is a schematic diagram of an automatic scoring target device according to an embodiment of the present invention. Referring to FIG1 , an embodiment of the present invention provides an automatic scoring target device 1, which includes a target 10, three optical capture modules 21, 22, 23, a control circuit 30, a fixing frame 40, and a light source 50. The target 10 includes a target area 110 having a plurality of scoring areas 111 and a non-scoring area 120, and the plurality of scoring areas 111 correspond to different plurality of scoring numbers. The target 10 can be made of materials such as solid wood or plastic, however, the present invention is not limited to the above examples.

The target 10 has a disc-like appearance, and a non-scoring area 120 arranged on its surface is arranged around a target area 110. The target area 110 may, for example, have a circular shape, and the non-scoring area 120 may, for example, be in a ring shape. Generally speaking, the scoring area 111 has different scores according to the different positions of the target 10, for example, the scoring area near the center of the target 10 has a higher score than the scoring area near the circumference of the target 10. And the smaller the area of the scoring area 111, the higher the difficulty of the dart hitting, and the higher the score. The non-scoring area 120 of FIG. 1 is provided with four positioning marks 121, 122, 123, and 124 configured in a predetermined manner, which are used as a reference to determine the scoring area corresponding to the dart position. For example, the predetermined manner may be, for example, an even distribution. For example, the four positioning marks 121, 122, 123, and 124 in FIG1 form a square. However, in the embodiment of the present invention, the number of positioning marks is not limited to 4. The positioning marks 121, 122, 123, and 124 can be marked with a color that is high in contrast to the surrounding environment to facilitate image recognition.

Three optical capture modules 21, 22, 23 are respectively arranged around the target 10. Any two adjacent ones of the three optical capture modules 21, 22, 23 will form an angle relative to the center of the target area 110, and each angle has a predetermined angle. For example, as shown in FIG. 1, the three optical capture modules 21, 22, 23 form angles θ1, θ2, θ3 relative to the center of the target area 110, and the angles θ1, θ2, θ3 are all 120 degrees. However, the present invention is not limited to the above examples. In order to reduce the dart landing point error caused by the different shooting angles of the optical capture modules 21, 22, and 23 to the target area 110, the optical capture modules 21, 22, and 23 are arranged on a fixing frame 40 located around the target 10 to completely capture the image of the target 10. To further explain, as shown in FIG4, when the first dart is located on the target 10, the control circuit 30 controls the optical capture module 21 to capture the image to be scored IM1, the optical capture module 22 to capture the image to be scored IM2, and the optical capture module 23 to capture the image to be scored IM3. The scoring areas of the images to be scored IM1 and IM3 are the same and different from the scoring area of the image to be scored IM2. It is known that the scoring areas of the images to be scored IM1 and IM3 are the actual landing points of the first dart. Therefore, the present invention utilizes optical capture modules 21, 22, and 23 disposed at different positions of the target to improve the accuracy of determining the landing point of the dart.

In order to make the captured image clear and easy to identify, a light source 50 is set on the optical capture modules 21, 22, and 23. The light source 50 can be a point light source, for example, in the embodiment, the light source 50 is set on a fixed frame. Alternatively, the light source 50 can be a strip light source, which is set around the target 10. The number, shape and position of the light source of the present invention are not limited to the above examples.

As shown in FIG1 , the light source 50 is a point light source, and three light sources 50 are respectively arranged on one side of the optical capture modules 21, 22, and 23. Since they are arranged on a fixed frame 40 having a certain height, the image of the entire target area 110 can be illuminated, so as to facilitate the optical capture modules 21, 22, and 23 to capture the image. In this embodiment, the operating mechanism of the light source 50 is the same as that of the optical capture modules 21, 22, and 23. When the control circuit 30 sends a signal to the light source 50 and the optical capture modules 21, 22, and 23 at the same time, the light source 50 provides sufficient illumination brightness for the optical capture modules 21, 22, and 23 to capture the image of the target 10. The control circuit 30 can control the light source 50 to turn on when the optical capture modules 21, 22, 23 are capturing images, or control the light source 50 to be continuously turned on.

The control circuit 30 can be integrated into a computer device, connected to the optical capture modules 21, 22, 23 in a wired or wireless manner, receive and process the images to be scored IM1, IM2, IM3, to obtain the first dart position P1 and the corresponding score, and then calculate the real first dart score RS1. The control circuit 30 can include, for example, one or more of a processor, a controller, and a microcontroller to implement the functions described herein.

In detail, refer to FIG. 2 , which is a functional block diagram of the automatic scoring target device of an embodiment of the present invention. The control circuit 30 is connected to the light source 50, the memory 60, and the optical capture modules 21, 22, and 23. In the present embodiment, the control circuit 30 may also include an image processing circuit 31, and the image processing circuit 31 may be, for example, an image processor (graphic processing unit, GPU). The memory 60 is used to store images, including images to be scored IM1, IM2, IM3 and reference images R1, R2, and R3. The memory 60 may be a random access memory (Random Access Memory, RAM). However, the present invention is not limited to the above examples.

After the control circuit 30 receives the images to be scored IM1, IM2, IM3, the image processing circuit 31 corrects the target area 110 in the images to be scored IM1, IM2, IM3 into a predetermined shape, such as a perfect circle. However, the present invention is not limited to the above examples.

Next, the control circuit 30 reads the reference image from the memory 60 and compares it with the calibrated images to be scored IM1, IM2, IM3, determines the first dart position P1 according to the comparison result, and stores the images to be scored IM1, IM2, IM3 in the memory 60. When the first dart DT1 is not yet located at the target 10, each optical capture module 21, 22, 23 captures the target 10 to obtain the corresponding reference image and stores it in the memory 60.

Next, the step of comparing the multiple images to be scored IM1, IM2, IM3 with the multiple reference images to determine the first dart position P1 includes: using the image processing circuit 31 to compare the images to be scored IM1, IM2, IM3 with the reference image as a benchmark to generate difference signals DS1, DS2, DS3. Using the image processing circuit 31 to use the positions of the difference signals DS1, DS2, DS3 in the reference image as the first dart position P1. The step of generating the difference signal includes executing one or more of an image sharpening process, an image binarization process, and a morphological opening operation process. Through the above-mentioned image operation procedure, for example, open operation, the image of the first dart position P1 can be converged to the center point, and the noise outside the image of the first dart position P1 can be eliminated, so that the accuracy of the dart landing point is improved.

The embodiment of the present invention provides a method for automatic scoring of targets. As shown in Figures 3 to 5. Figure 3 is a flow chart of the automatic scoring method of the embodiment of the present invention. Figure 4 is a schematic diagram of steps S2 and S3 of the automatic scoring method of the present invention. Figure 5 is a schematic diagram of the image to be scored before and after correction of the embodiment of the present invention.

Referring to FIG. 3 , a target automatic scoring method includes the following steps:

First, a target 10 is provided, which includes a target area 110 having a plurality of scoring areas 111 and a non-scoring area 120. The plurality of scoring areas 111 correspond to different plurality of scoring numbers, and the non-scoring area 120 includes positioning marks 121, 122, 123, 124, and optical capture modules 21, 22, 23 are disposed around the target 10.

Step S1: In response to the first dart being located on the target, the control circuit controls a plurality of optical capture modules to capture a plurality of images to be scored from the target area.

When the contestant throws the first dart DT1 onto the target area 110, the control circuit 30 transmits a control signal to the optical capture modules 21, 22, 23 to capture images of the target area 110. Specifically, the control circuit 30 controls the optical capture modules 21, 22, 23 to capture the images IM1, IM2, IM3 to be scored within a preset time period, and the preset time period is between a first time point when the first dart DT1 reaches the target 10 and a second time point when the second dart DT2 reaches the target 10.

In this embodiment, it is pre-set that when each dart reaches the target 10, an image is captured. The image of the previous time period can be used as a reference image for comparison with the current images to be scored IM1, IM2, and IM3. In other words, the reference image used to compare the image to be scored captured after the second time point can be an image captured between the first time point and the second time point. That is, the previous frame of the image to be scored can be used as a reference image for the next frame.

The following steps S2 to S4 are performed by the control circuit 30:

Step S2: Compare the multiple images to be scored with the multiple reference images to determine the first dart position.

Before the images to be scored IM1, IM2, and IM3 are compared, the image processing circuit 31 of the control circuit 30 corrects the target area in the original image to be scored to a predetermined shape. As shown in FIG5 , the target area 110 in the frame is an elliptical shape, while the target area 110 of the reference image used for comparison is a perfect circle. Since the appearance of the target area 110 to be compared is different in the original image to be scored and the reference image, it is not easy to perform image comparison. In the correction step, the image processing circuit 31 first selects the target 10 in the original image to be scored as the range to be corrected, as shown in FIG5 , where the dotted line frame is the framed range of the target 10. Then, an algorithm is used to extract the image within the framed range with elliptical features, that is, the range of the target area 110 in the target 10. The algorithm used is, for example, Hough transform. However, the present invention is not limited to the above examples. Then, the major axis and minor axis of the ellipse in the image are measured, and the ellipse in the image is scaled so that the lengths of the major axis and the minor axis are equal, and the ellipse in the image is corrected to a predetermined shape, i.e., a perfect circle. At this time, the appearance features of the image to be compared among the images to be scored IM1, IM2, and IM3 are corrected to the same perfect circle as the reference image, which is convenient for comparison with the reference image.

Next, the image processing circuit 31 compares the multiple images to be scored IM1, IM2, and IM3 with the reference image as a benchmark to generate difference signals DS1, DS2, and DS3. The image to be scored IM1 has different image features relative to the reference image. For example, the image features in the image to be scored IM1 may include one or more of pixels, colors, grayscale values, and brightness. However, the present invention is not limited to the above examples. Specifically, after the images to be scored IM1, IM2, and IM3 are compared with the reference image in a point-to-point mapping mode, the image processing circuit 31 obtains multiple feature points in the images to be scored that are different from the reference image. However, these feature points are not all the landing positions of the first dart DT1.

Therefore, it is necessary to use a specific image processing program for different feature points to eliminate unnecessary noise. In this embodiment, the image processing circuit 31 executes one or more of an image sharpening program, an image binarization program, and a morphological opening operation program to converge the landing point position of the first dart DT1. As shown in FIG4 , the image processing process of the image to be scored IM1 is the same as that of the images to be scored IM2 and IM3, and the image to be scored IM1 is used for illustration. The first dart DT1 in the image to be scored IM1 includes a plurality of pixels. Through the program executed by the image processing circuit 31, such as the opening operation program, the area of a block can be shrunk inward toward the middle of the block to eliminate the noise outside the block that may cause calculation errors. Simplifying the number of pixels of the first dart DT1 can not only make the first dart DT1 in the image closer to the real position of the first dart DT1, but also eliminate the noise that causes the error in judging the scoring area. At this time, the pixels generated by the image processing program are the difference signals DS1, DS2, and DS3. Then, the positions of the difference signals DS1, DS2, and DS3 in the reference image are used as the first dart position P1 through the image processing circuit 31. In other words, the position of the pixels included in the difference signal DS1 corresponding to the reference image is used as the first dart position P1 of the image captured by the optical capture module 21.

Step S3: Using one or more positioning marks in the image to be scored as a reference, the scoring area corresponding to the first dart position is determined, and the first dart score is obtained.

This embodiment uses one or more positioning marks of each of the images to be scored IM1, IM2, and IM3 as a reference to determine the score area 111 corresponding to the first dart position P1 and obtain the first dart score S1. For example, four positioning marks 121, 122, 123, and 124 are used as a reference. However, the present invention is not limited to this, and one or more of the positioning marks 121, 122, 123, and 124 can be used as a reference. As shown in Figure 4, in the image to be scored IM1, the control circuit 30 uses the positioning mark 124 closest to the optical capture module 21 as a reference to calculate the score area corresponding to the difference signal DS1, so as to determine that the corresponding score of the scoring area 111-1 is 5 points. Similarly, it is determined that the score of the score area 111-2 corresponding to the optical capture module 22 is 10 points, and the score of the score area 111-3 corresponding to the optical capture module 23 is 5 points.

Step S4: Count each first dart score obtained to generate a real first dart score.

In a preset time period, the control circuit 30 counts the first dart score that appears the most times from the multiple dart scores corresponding to the multiple optical capture modules 21, 22, and 23 as the real first dart score. As shown in FIG4, the multiple dart scores corresponding to the optical capture modules 21, 22, and 23 are 5 points, 10 points, and 5 points, respectively. After being counted by the control circuit 30, the score that appears the most times is 5 points, so 5 points is determined to be the real first dart score RS1.

Through the above description, the present invention can accurately obtain the dart score without the need for personnel to judge the dart landing point image. In addition, the specific image processing program can not only improve the accuracy of the control circuit for the dart landing point, but also speed up the image processing calculation speed. In addition, images obtained at different angles can improve the accuracy of judging the dart landing point.

Beneficial Effects of the Embodiments

One of the beneficial effects of the present invention is that the automatic scoring target device and the automatic target scoring method provided by the present invention can obtain the real first dart score through the technical solutions of "optical capture modules at different positions capture images to be scored" and "control circuits compare and count images to be scored".

The present invention can solve the problem of dart landing point judgment errors caused by blind spots in images captured by a single optical capture module by comparing the images to be scored obtained by optical capture modules at different positions, thereby improving the accuracy of dart landing point judgment.

Furthermore, in the step where the control circuit compares the image to be scored with the previous frame image to determine the position of the dart, the control circuit first removes the non-scoring area in the image and corrects the scoring area in the image to be a perfect circle. Then, in the step of comparing different frames of images, the image processing is used to compare the previous frame image to obtain the difference. Correcting the image to be scored first and then converging the dart landing point with image processing can reduce the amount of data processing for image processing and shorten the processing time, while also achieving improved accuracy in determining the dart landing point.

The above disclosed contents are only the preferred feasible embodiments of the present invention, and do not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the contents of the description and drawings of the present invention are included in the scope of the patent application of the present invention.

1: Automatic scoring target device 10: Target 110: Target area 111, 111-1, 111-2, 111-3: Scoring area 120: Non-scoring area 121, 122, 123, 124: Positioning mark 21, 22, 23: Optical capture module 30: Control circuit 31: Image processing circuit 40: Fixing frame 50: Light source 60: Memory θ1, θ2, θ3: Angle DT1, DT2: First dart, second dart IM1, IM2, IM3: Image to be scored P1: First dart position S1: First dart score RS1: Actual first dart score DS1, DS2, DS3: Differential signal

FIG. 1 is a schematic diagram of an automatic scoring target device according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of the automatic scoring target device according to an embodiment of the present invention.

FIG3 is a flow chart of the automatic scoring method according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of steps S2 and S3 of the automatic scoring method of the present invention.

FIG. 5 is a schematic diagram of an image to be scored before and after correction according to an embodiment of the present invention.

1: Automatic scoring target device

10: Target

110: Target area

111: Scoring Zone

120: Non-scoring zone

121, 122, 123, 124: Positioning marks

21, 22, 23: Optical capture module

30: Control circuit

40:Fixed bracket

50: Light source

θ1, θ2, θ3: angle of intersection

Claims (20)

An automatic scoring target device comprises: A target, comprising a target area with multiple scoring areas and a non-scoring area, wherein the multiple scoring areas correspond to different multiple scores, and the non-scoring area is provided with multiple positioning marks; Multiple optical capture modules are arranged around the target and configured to capture multiple images to be scored of the target area when a first dart is located on the target; and A control circuit is configured to compare the multiple images to be scored with multiple reference images to determine a first dart position, and to use one or more positioning marks in the images to be scored as a reference to determine the scoring area corresponding to the first dart position and obtain a first dart score, and then to count each of the first dart scores obtained to generate a true first dart score. An automatic scoring target device as described in claim 1, wherein the control circuit controls multiple optical capture modules to capture multiple images to be scored within a preset time period, and the preset time period is between a first time point when the first dart arrives at the target and a second time point when a second dart arrives at the target. The automatic scoring target device as described in claim 2 further includes a memory configured to store multiple reference images and multiple images to be scored, wherein each optical capture module captures the target to obtain the corresponding reference image when the first dart is not yet located at the target. An automatic scoring target device as described in claim 3, wherein, among the plurality of optical capture modules, any two adjacent optical capture modules form an angle relative to a center of the target area, and each of the angles has a predetermined angle. An automatic scoring target device as described in claim 2, wherein, within the preset time period, the control circuit counts the first dart score that appears the most times from among multiple first dart scores corresponding to multiple optical capture modules as the true first dart score. An automatic scoring target device as described in claim 1, wherein the control circuit further includes an image processing circuit configured to correct the target area in the image to be scored into a predetermined pattern. The automatic scoring target device as described in claim 6, wherein the step of comparing the plurality of images to be scored with the plurality of reference images to determine the position of the first dart comprises: Using the image processing circuit to compare the plurality of images to be scored with the reference image as a reference to generate a difference signal; and Using the position of the difference signal in the reference image as the first dart position by the image processing circuit. An automatic scoring target device as described in claim 7, wherein the step of generating the difference signal includes executing one or more of an image sharpening process, an image binarization process and a morphological opening operation process through the image processing circuit. The automatic scoring target device as described in claim 1 further includes a fixing frame disposed around the target, and a plurality of optical capture modules are disposed on the fixing frame to completely capture the target. The automatic scoring target device as described in claim 9 further includes one or more light sources disposed on the fixing frame and configured to illuminate at least the target area. A method for automatic scoring of a target, comprising: Providing a target, comprising a target area with multiple scoring areas and a non-scoring area, wherein the multiple scoring areas correspond to different multiple scores, and the non-scoring area is provided with multiple positioning marks, and multiple optical capture modules are provided around the target; In response to a first dart being located on the target, a control circuit controls the multiple optical capture modules to capture multiple images to be scored for the target area; The following steps are performed by the control circuit: Comparing the multiple images to be scored with multiple reference images to determine a first dart position; Using one or more positioning marks in the image to be scored as a reference to determine the scoring area corresponding to the first dart position, and obtain a first dart score; and Each of the first dart scores obtained is counted to generate a real first dart score. In the target automatic scoring method as described in claim 11, the control circuit controls the multiple optical capture modules to capture the multiple images to be scored within a preset time period, and the preset time period is between a first time point when the first dart arrives at the target and a second time point when the second dart arrives at the target. The target automatic scoring method as described in claim 12 further includes a memory configured to store multiple reference images and multiple images to be scored, wherein each optical capture module captures the target to obtain the corresponding reference image when the first dart is not yet located at the target. As described in claim 11, in the target automatic scoring method, among the multiple optical capture modules, any two adjacent optical capture modules form an angle relative to a center of the target area, and each of the angles has a predetermined angle. A target automatic scoring method as described in claim 12, wherein, within the preset time period, the control circuit counts the first dart score that appears the most times from the multiple dart scores corresponding to the multiple optical capture modules as the true first dart score. The target automatic scoring method as described in claim 11, wherein the control circuit further includes an image processing circuit configured to correct the target area in the image to be scored into a predetermined pattern. In the target automatic scoring method as described in claim 16, the step of comparing the plurality of images to be scored with the plurality of reference images to determine the position of the first dart includes: Using the image processing circuit to compare the plurality of images to be scored with the reference image as a reference to generate a difference signal; and Using the position of the difference signal in the reference image as the first dart position by the image processing circuit. The target automatic scoring method as described in claim 17, wherein the step of generating the difference signal includes executing one or more of an image sharpening process, an image binarization process and a morphological opening operation process through the image processing circuit. The target automatic scoring method as described in claim 11 further includes a fixing frame, and further includes a fixing frame disposed around the target, and multiple optical capture modules are disposed on the fixing frame to completely capture the target. The target automatic scoring method as described in claim 19 further includes one or more light sources disposed on the fixing frame and configured to illuminate at least the target area.

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