Multi-target Recognition And Processing Method Based On Light Field Imaging

The external ballistic parameters of multi-barrel-fired weapons and intelligent ammunition are important research directions in the field of weapon testing.Weapons such as smart ammunition have the advantage of being able to fire multiple projectiles simultaneously.However,due to the large number of projectiles,there is occlusion and overlapping imaging between projectiles,so the current photoelectric detection devices such as multi-light screen target and array CCD target cannot use the existing multi-target recognition methods to accurately identify the external ballistic parameters of intelligent ammunition and other weapons.The four-dimensional information of light space saved by the light field imaging system enables the clear detection of multi-target imaging in different spatial positions,which provides a hardware basis for multi-target recognition in overlapping occlusion imaging.Therefore,this topic focuses on the problem of multi-target recognition in shooting range,and carries out the research of multi-target recognition by using light field imaging system.Focusing on the imaging mechanism of multi-target in different spatial distribution and based on the research status of multi-target recognition and processing methods at home and abroad,a multi-target recognition and processing method based on light field imaging is studied.By analyzing the light field imaging mechanism of multiple objects in different spatial positions,the spatial information recognition method of multiple objects is studied,and the overall architecture of multiple objects recognition and processing in light field imaging is designed.In order to solve the problem that existing multi-target recognition methods can not recognize multi-target in coincidence imaging,the mechanism of multi-target coincidence imaging is analyzed.A multi-target recognition method based on the image information of target light field is proposed,and the feature information of multi-target image is extracted.The image processing method of light field in complex background is studied to reduce the influence of interference factors such as background light source on multi-target recognition.In order to solve the problem that the single-light field imaging system cannot recognize multiple objects in the same occlusion imaging path,a multi-target matching recognition method based on dual-light field imaging was studied,and a multi-target spatial information processing model was established.At the same time,aiming at the problem of background interference information in the light field image,an interference information processing algorithm based on the key parameters of the light field is studied to eliminate the interference information.The validity of the multi-target matching recognition algorithm and multi-target spatial information processing model is verified by simulation experiments.The results of simulation show that there are uncertain targets in the recognition results.In order to realize the recognition and processing of the uncertain target in the dual light field recognition results,the temporal and spatial correlation characteristics of the fragment group were analyzed,and a cascade processing method of multi-target feature information and matching conflict processing method based on continuous frame frequency detection method were studied.In order to verify the validity of the multi-target recognition and processing method,a corresponding simulation experiment is designed.The experiment consists of three parts: data acquisition of multi-target light field imaging,multi-target recognition and verification of coincidence and occlusion imaging,and multi-target feature information processing and verification.According to the key parameters of the light field imaging system,a detection platform of the double light field imaging system is built,and the multi-target recognition and processing method is applied to process the multi-target light field imaging information.By comparing the measured spatial information and the ideal spatial information of multiple targets in continuous frame rate,it is verified that the multi-target recognition and processing method established can realize the accurate recognition of multiple targets.