Foreign matter three-dimensional detection system and method in vehicle bottom security check system

Abstract

The invention provides a foreign matter three-dimensional detection system and method in a vehicle bottom security check system, and belongs to the technical field of foreign matter detection. The foreign matter three-dimensional detection system comprises a vehicle bottom three-dimensional data acquisition module used for acquiring vehicle bottom three-dimensional data; a vehicle bottom three-dimensional data preprocessing moduleused for preprocessing the vehicle bottom three-dimensional data by using an improved adaptive threshold algorithm; a feature selection and extraction module used for respectively extracting global features and local features of the preprocessed vehicle bottom three-dimensional data, and fusing the global features and the local features to obtain fused features; and a foreign matter identification module used for carrying out three-dimensional target identification on the fusion features. Compared with a two-dimensional image detection method, the method is less affected by the environment, and has a better detection result under the conditions that the illumination condition is limited and the target distance is long. According to the method, the space information, the texture information and the like of the vehicle chassis can be better stored, and the position information of the foreign matter at the vehicle bottom in the three-dimensional space can be more intuitively reflected.

Description

technical field [0001] The invention belongs to the technical field of foreign matter detection, and in particular relates to a three-dimensional foreign matter detection system and method in a vehicle bottom security inspection system. Background technique [0002] Offices of national government agencies, civil aviation airports, ports, stations, military institutions and bases, embassies abroad, checkpoints, banks, jewelry and precious metal processing factories and mines, scientific research and confidential places, large conference and event venues, commercial buildings, large hotels For hotels, important parking lots, aerospace bases, nuclear power plants and other important security places, the entrance and exit vehicle passages mainly rely on internal security personnel to conduct manual searches when conducting security checks on the vehicle chassis, which is laborious and time-consuming. Due to the wide variety of motor vehicle chassis, inspectors are required to ha...

AI Technical Summary

Problems solved by technology

Manual-based detection of foreign objects in vehicle chassis is not only time-consuming and labor-intensive but also inefficient, and has high requirements for practitioners

The main problem of the foreign object detection method based on two-dimensional detection is that the two-dimensional image is the mapping of the three-dimensional space on the two-dimensional plane. In the process of obtaining the two-dimensional image, some important three-dimensional information will inevitably be lost, such as the spatial position. , motion posture, etc., which will have a great impact on the next research work

In addition, the acquisition of two-dimensional images is also extremely susceptible to interference from external factors such as light and distance, resulting in further loss of data

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