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Image technology-based bullet hole recognition method

A recognition method and image technology technology, applied in the field of automatic target reporting, can solve problems such as misjudgment and dependence, and achieve the effect of improving accuracy, recognition accuracy and speed

Inactive Publication Date: 2016-06-08
杭州晨鹰军泰科技有限公司
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Problems solved by technology

However, the result of this method relies on a large number of bullet hole data, which is easy to cause misjudgment

Method used

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  • Image technology-based bullet hole recognition method

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Embodiment Construction

[0026] The bullet hole recognition method based on the image technology of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] The preprocessing stage as figure 1 As shown, the specific steps are as follows:

[0028] (1) The two frames of images before and after the acquisition are taken as the sample pictures to be identified, and these two frames of images are the images before the target target I update and on-target image I score .

[0029] Use the existing technology or the target recognition method based on the Haar feature to identify the target, and the pre-target image I update Perform cropping to obtain the ROI image I that just includes the target position lastROI ;Use the same method to target the image I score Perform cropping to obtain the ROI image I that just includes the target position ROI .

[0030] The target recognition method based on the Haar feature includes an initialization stage, a tr...

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Abstract

The invention discloses an image technology-based bullet hole recognition method. The method includes a preprocessing stage, a recognition stage and a confidence calculation stage. According to the preprocessing stage, two adjacent frames of images are acquired and are adopted as pictures to be recognized; regions of interest which exactly contain a target position are extracted from the two frames of images; based on different thresholds for different color regions, frame difference processing is performed on the regions of interest in the two frames of images to be recognized, so that a post-frame difference picture is obtained. According to the recognition stage, an edge detection algorithm is utilized to find contour information in the post-frame difference picture. According to the confidence calculation stage, the absolute area confidence, length-width ratio confidence and area duty ratio confidence of each contour are calculated, a contour of which the sum of the absolute area confidence, length-width ratio confidence and area duty ratio confidence is maximum is a bullet hole which is obtained through recognition. According to the method of the invention, the two frames of images before and after a bullet is shot on a target are processed, so that a new bullet hole can be recognized accurately and fast, and an accuracy rate reaches more than 98%.

Description

technical field [0001] The invention relates to the technical field of automatic target reporting, in particular to a bullet hole recognition method based on image technology. Background technique [0002] In the prior art, the bullet hole identification method is roughly to perform image processing on a single image to identify bullet holes. For example, the multi-bullet hole identification method based on the projection principle uses the rectangular segmentation method of the projection principle to segment the image containing bullet holes into Several areas, and then use the area-filling-based cross-template method to identify the bullet holes, and calculate the center position of the bullet holes. [0003] In the prior art, there are also bullet holes obtained by processing two frames of images before and after shooting. For example, the bullet hole recognition method based on color similarity measurement uses color images as the data source. On the basis of analyzing ...

Claims

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Application Information

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IPC IPC(8): G06K9/32G06K9/34G06K9/46
CPCG06V10/25G06V10/267G06V10/44
Inventor 周斯忠蒋荣欣岳猛
Owner 杭州晨鹰军泰科技有限公司
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