The method of three dimensional measurement of broken fragments field based on image processing

DOI:	10.11809/bqzbgcxb2024.04.034
Keywords:	image processing; broken fragments field; three dimensional testing; photographic measuring;gravity center method
Abstract:	Aiming at the problem of the low efficiency of manual target detection method, large human error and unable to use 3D testing technology in broken fragments field, through using photographic measuring technique, we propose a method to calculate the position coordinates named gravity center method of grayscale value weighting. The 3D space measurement of the broken film is realized by using the contour recognition of the target plate based on single point mark and the 3D splicing of the target plate with wide range and position change of the coded mark, and the conversion of 2D coordinate to 3D space coordinate. Through the designed test, we verify the reliability of the method, and the result shows that when using this method, the recognition rate of broken fragments larger than 3mm is 100%, and we can accurately obtain the three dimensional coordinates relative to the explosion center of broken fragments. This method achieves three dimensional testing of broken fragments field, and compared with the manual target detection method, the testing efficiency improved by more than 10 times. This conclusion can provide technical support for accurate testing of the explosive power field of the broken fragments, and has certain engineering application value.
Published:	2024-04-30
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