Abstract
The bullet impact detection in the silhouette plays an important role in the institutions which have a shooting range, specially where are regulated the license to carry a gun and where the evaluation manual process could present distortion in the ability’s evaluation of the shooter and like a consequence the license’s issuance. This paper proposes a method for an automatic detection of the bullet impacts in silhouettes based on deep learning and image processing, which consist of the following steps: pre-processing, impacts detection, edge detection and evaluation results. The experiments about 600 silhouettes with 2401 bullet impacts images of the proposed and implemented method considering the models Resnet 50 and Resnet 101 for Mask R-CNN show that Resnet 50 get better results than Resnet 101, achieving 97.6 %, 99.5 %, and 97.9 %, of accuracy, precision and recall, respectively, above the methods Circular Hough Transform, Circlet Detection, Random Sample Consensus, Randomized Hough Transform, Randomized Circle Detection, Support Vector Machine, Faster R-CNN, MnasNet and YOLO. Also, the results show 100 % of effectiveness in the edge detection and the count of the detected bullet impacts.
Highlights
The shooting range is an outdoor or indoor space, conditioned to practice the gunshot
The performed experiments are presented to demonstrate the efficiency of the trained model and the used image processing techniques to determine how successful a shooting was, for that reason, 60 shooting silhouettes were used which contain a total of 249 bullet impacts that were not used in the training and validation process
A method called method of bullet impact detection (MBID) (Method of Bullet Impact Detection) has been introduced to solve DBIS based on deep learning and image processing, which consists of 4 steps: 1) Pre-processing, 2) Impact detection, 3) Edge detection and 4) Evaluation of results
Summary
The shooting range is an outdoor or indoor space, conditioned to practice the gunshot. The process to get the license, generally, contemplate a psychological test to make sure of the person’s mental health, a theoretical test which objective is to evaluate the normative knowledge and basic concepts related to a gun, a practical test to determine the ability of handling, the gun supply and basic safety rules, and, the test which measure the skill of the shooter (shooting test). This process is applied in some countries [1]–[4].
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