A method for automatic target correction of live shooting video precision target scoring

Abstract

The application discloses a kind of live firing video precision target reporting automatic target correction methods, after each target machine moves or replaces target paper, by calculating the intersection point coordinate of the diagonal line of mark point and mark point, the horizontal or vertical direction deviation value of the intersection point coordinate, the coordinate value of the zero point of the picture pixel coordinate in horizontal or vertical direction is reduced to the horizontal or vertical direction coordinate deviation value, and the zero point of the picture pixel coordinate is corrected, so as to reduce the error of the pixel coordinate reading of impact point, and then improve the accuracy of target reporting.In addition, since the speed of the live firing training target machine is relatively fast, by setting the mark point on the target paper on the target machine, the intersection point of the diagonal line of the mark point and the mark point is coincided with the center point of the target paper, so that it can more conveniently and quickly obtain the coordinates of the mark point, so as to improve the speed of calculating the intersection coordinates of the diagonal line, and further improve the accuracy of target reporting.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of live firing training, in particular to a live firing video precision target scoring automatic target correction method. BACKGROUND

[0002] In live firing training, the shooting score is calculated by leaving a bullet hole on the target paper to count the shooting rings. When the target machine position is fixed and unchanged or the target paper is not replaced, the live firing video target scoring is to use the camera to image, determine the coordinate zero point by pixel positioning according to the pixel reference target paper target size, leave a bullet hole on the target paper during live firing, then calculate the impact point and pixel relative position according to the pixel difference (bullet hole) of the video front and rear frames, and compare with the coordinate zero point to determine the impact point coordinate for precision target scoring.

[0003] However, in actual shooting training, when the target machine is moved by human or returns to the original position after moving by itself, or after replacing the target paper, there is always an error compared with the original position, so that the image pixel coordinate zero point cannot coincide with the center point of the ten-ring (target center) of the target paper. At this time, the target paper is not completely in the original camera alignment imaging area (assuming that the image pixel distance is Z parts along the horizontal direction and T parts along the vertical direction), so that the image pixel coordinate zero point cannot coincide with the center point of the target paper. At this time, the pixel point coordinate of the impact point is (X, Y), and the actual coordinate relative to the center point of the ten-ring on the target paper is (X-Z, Y-T). When scoring, the ring number is calculated according to the pixel coordinate point (X, Y) combined with the ring number pixel coordinate range of the target paper, which will have an error, thereby causing the problem of inaccurate target scoring. SUMMARY

[0004] The purpose of the present application is to provide a live firing video precision target scoring automatic target correction method which can automatically correct the image pixel coordinate zero point in time after the target machine moves or the target paper is replaced, reduce the reading error of the impact point pixel coordinate, and improve the accuracy of target scoring.

[0005] The live firing video precision target scoring automatic target correction method provided by the present application comprises the following steps:

[0006] At least two mark points are arranged on one side of the target paper on the target machine, and at least two mark points are also arranged on the other side, and the intersection point of the diagonal lines of the mark points coincides with the target center point;

[0007] Before the target machine moves or the target paper is replaced, the mark points on the target paper are identified, the coordinates of the current mark points are calculated, the coordinates of the intersection point of the diagonal lines of the mark points are calculated according to the coordinates of the mark points on the target paper, and the coordinates of the intersection point of the diagonal lines are stored;

[0008] After the target machine moves or the target paper is replaced, the coordinates of the mark points on the target paper are acquired, the coordinates of the current mark points are calculated, the coordinates of the intersection points of the mark points and the diagonal lines of the mark points are calculated according to the coordinates of the mark points on the target paper, and the coordinates of the intersection points are compared with the coordinates of the intersection points stored before the target machine moves or the target paper is replaced;

[0009] If the coordinates of the intersection points after the target machine moves or the target paper is replaced deviate in the horizontal or vertical direction, the deviation value of the coordinates in the horizontal or vertical direction is calculated, the coordinate value of the photograph pixel coordinate zero point in the horizontal or vertical direction is subtracted by the deviation value of the coordinates in the horizontal or vertical direction to re-correct the photograph pixel coordinate zero point, and otherwise, the photograph pixel coordinate zero point is not corrected;

[0010] The number of target paper rings corresponding to the pixel coordinates of the impact point is accurately reported according to the re-corrected photograph pixel coordinate zero point.

[0011] As a preferred scheme of the present application, when the number of mark points is four, the four mark points are arranged in a rectangle on the four corners of the target paper.

[0012] As a preferred scheme of the present application, after the target machine moves or the target paper is replaced, the coordinates of any three mark points between the four mark points are acquired, the coordinates of the midpoints on the diagonal lines are acquired according to the direct triangle surrounded by the three mark points, that is, the coordinates of the intersection points of the diagonal lines, and the coordinates of the intersection points are compared with the coordinates of the intersection points stored before the target machine moves or the target paper is replaced.

[0013] The present application has the following beneficial effects:

[0014] The real bullet shooting video accurate target reporting automatic target correction method can reduce the error of the pixel coordinate reading of the impact point, and further improve the accuracy of target reporting, realizes automatic target correction without manual target correction, and improves the work efficiency. In addition, since the speed of the target machine moving in the real bullet shooting training is relatively fast, the mark points are arranged on the target paper on the target machine, the intersection points of the mark points and the diagonal lines of the mark points are coincided with the center point of the target paper, the coordinates of the mark points can be more conveniently and quickly acquired, the speed of calculating the intersection coordinates of the diagonal lines is improved, and the accuracy of target reporting is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a flowchart of the real bullet shooting video accurate target reporting automatic target correction method of the present application;

[0016] Figure 2 It is a schematic diagram of setting four mark points on the target paper;

[0017] Figure 3 For selecting any three identification points, the intersection point coordinate diagram is calculated. Embodiments

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0019] The present application provides a real bullet shooting video accurate target reporting and automatic target correction method, as shown in the figure, comprising the following steps: Figure 1

[0020] S1, at least two identification points are arranged on one side of the target paper on the target machine, and at least two identification points are also arranged on the other side, the intersection point of the diagonal line between the identification points coincides with the bullseye.

[0021] The number of identification points can be set to four or more. When the number of identification points is set to four, the four identification points are arranged in a rectangle on the four corners of the target paper, as shown in the figure. Figure 2

[0022] S2, before the target machine moves or the target paper is replaced, the identification points on the target paper are acquired, the coordinates of the current identification points are calculated, the coordinates of the intersection point of the diagonal line between the identification points are calculated according to the coordinates of the identification points on the target paper, and the coordinates of the intersection point of the diagonal line are stored.

[0023] Before the target machine moves or the target paper is replaced, the image recognition camera device can be adjusted to face the target paper, and the imaging center point of the camera device coincides with the bullseye. At this time, the bullseye can be set as the center point of the target paper 10. Then the identification points on the target paper are acquired by the camera device, the coordinates of the current identification points are calculated, and the coordinates of the identification points can also be calculated by the background computer data processing system.

[0024] S3, after the target machine moves or the target paper is replaced, the identification points on the target paper are acquired, the coordinates of the current identification points are calculated, the coordinates of the intersection point of the diagonal line between the identification points are calculated according to the coordinates of the identification points on the target paper, and the coordinates of the intersection point are compared with the stored coordinates of the intersection point before the target machine moves.

[0025] The identification points on the target paper can be acquired by the camera device, and the coordinates of the current identification points can also be calculated by the background computer data processing system after the identification points on the target paper are acquired by the camera device.

[0026] ​​S4, if the intersection point coordinates deviate horizontally or vertically after the target machine moves, calculate the horizontal or vertical deviation value, and subtract the horizontal or vertical deviation value from the coordinate value of the photograph pixel coordinate zero point horizontally or vertically to correct the photograph pixel coordinate zero point, otherwise do not correct the photograph pixel coordinate zero point.

[0027] S5, according to the re-corrected photograph pixel coordinate zero point, calculate the pixel coordinate corresponding to the target paper ring number of the impact point for accurate target reporting.

[0028] After each target machine moves or the target paper is replaced, the horizontal or vertical deviation value of the intersection point coordinates of the identification points and the diagonal line connecting the identification points is calculated, the coordinate value of the photograph pixel coordinate zero point horizontally or vertically is subtracted from the horizontal or vertical deviation value to correct the photograph pixel coordinate zero point, thereby reducing the error of the impact point pixel coordinate reading, and further improving the accuracy of the target reporting. At the same time, automatic target calibration is realized without manual target calibration, and the work efficiency is improved. In addition, since the speed of the live ammunition shooting training target machine is relatively fast, the identification points are set on the target paper of the target machine, the intersection point of the diagonal line connecting the identification points is coincided with the center point of the target paper, so that the coordinates of the identification points can be obtained more conveniently and quickly, thereby improving the speed of calculating the intersection coordinates of the diagonal line, and further improving the accuracy of the target reporting.

[0029] As shown in Figure 2 , when the number of identification points is four, the four identification points are respectively arranged in a rectangular distribution on the four corners of the target paper, the four positioning points and the impact point on the target paper are recognized by the camera with image recognition, the photograph pixel coordinates of the four positioning points ( , ), ( , ), ( , ), ( , ) and the photograph pixel coordinates of the impact point (X+Z, Y+T) are calculated. Using any three of the four positioning points, combining the known distance from the center point of the ten rings to the four positioning points, and combining the calculated positioning point pixel coordinates in the photograph, as Figure 3 shown, the correction parameter Z= +( - ) / 2=( + ) / 2, and the correction parameter T= +( - ) / 2=( + The pixel coordinate of the center point of the ten-ring is (Z, T). The correct coordinate of the center point of the ten-ring should be (0, 0), so the pixel coordinate (X+Z, Y+T) of the impact point needs to be corrected by (-Z, -T) to the correct coordinate (X, Y), so that the pixel coordinate of the impact point corresponding to the target paper ring number and the azimuth accuracy report target can be calculated.

[0030] As preferred embodiments of the present application, in the description of the present specification, the description referring to the terms "preferred" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The above embodiments are only used to illustrate the detailed schemes of the present application, and the present application is not limited to the above detailed schemes, i.e. it does not mean that the present application must rely on the above detailed schemes to be implemented. It should be understood by those skilled in the art that any improvement of the present application, equivalent replacement of each raw material of the product of the present application, addition of auxiliary ingredients, selection of specific modes, etc. all fall within the protection scope and disclosure scope of the present application.

Claims

1. A method for automatic target correction of live shooting video precision target scoring, characterized in that, The method comprises the following steps: At least two identification points are arranged on one side of the target paper of the target machine, and at least two identification points are also arranged on the other side, and the intersection of the diagonal lines of the identification points coincides with the target center point; Before the target machine moves or the target paper is replaced, the identification points on the target paper are acquired, the coordinates of the current identification points are calculated, the coordinates of the intersection of the diagonal lines of the identification points are calculated according to the coordinates of the identification points on the target paper, and the coordinates of the intersection of the diagonal lines are stored; After the target machine moves or the target paper is replaced, the identification points on the target paper are acquired, the coordinates of the current identification points are calculated, the coordinates of the intersection of the diagonal lines of the identification points are calculated according to the coordinates of the identification points on the target paper, and the coordinates of the intersection of the diagonal lines are compared with the stored coordinates of the intersection of the diagonal lines before the target machine moves or the target paper is replaced; If the coordinates of the intersection of the diagonal lines after the target machine moves or the target paper is replaced deviate in the horizontal or vertical direction, the deviation value of the horizontal or vertical direction of the coordinates of the intersection of the diagonal lines is calculated, the coordinate value of the zero point of the photograph pixel coordinates in the horizontal or vertical direction is subtracted from the deviation value of the horizontal or vertical direction of the coordinates to correct the zero point of the photograph pixel coordinates, and otherwise, the zero point of the photograph pixel coordinates is not corrected; The pixel coordinates corresponding to the target paper ring number of the impact point are calculated according to the corrected zero point of the photograph pixel coordinates, and accurate target scoring is performed; When the number of the identification points is four, the four identification points are arranged in a rectangle on the four corners of the target paper; After the target machine moves or the target paper is replaced, the coordinates of any three identification points between the four identification points are acquired, the coordinates of the midpoint on the diagonal line are acquired according to the right-angled triangle formed by the three identification points, that is, the coordinates of the intersection of the diagonal lines, and the coordinates of the intersection of the diagonal lines are compared with the stored coordinates of the intersection of the diagonal lines before the target machine moves or the target paper is replaced.

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