Neural network reconstruction tomography method of dual-viewing angle X-ray security check system

Abstract

The invention provides a neural network reconstruction tomography method of a dual-viewing angle X-ray security check system. The neural network reconstruction tomography method is characterized in that in the security check system, X-ray devices placed vertically with each other are used for transmitting and detecting X-ray signals, and acquired signals are transmitted into a computer system; ina computer, a reconstructed image is meshed, and the total-variation square root operation of reconstructed meshes is rewritten as the matrix operation, so that the coefficients of the reconstructed meshes have strictly positive matrix representation. Through calculation of the projection weight value of each reconstructed mesh on the propagation path of each X ray, establish a linear projection equation set from a ray source to a detector is established, so that a reconstruction problem is transformed into optimization meeting convex quadratic programming, and finally optimization solution isperformed by a neural network algorithm. By the neural network reconstruction tomography method, the problem of mutual overlapping of perspective images is avoided and the advantages of relatively clear reconstruction of a three-dimensional image of an object and the like are achieved.

Description

technical field [0001] The invention relates to a reconstruction method of X-ray tomographic imaging technology, in particular to an X-ray tomographic imaging technology suitable for use in a dual-view security inspection system. Background technique [0002] Public safety has always been an important part of national security and an important guarantee for personal safety. In recent years, there have been violent terrorist attacks at home and abroad, which put forward higher and higher requirements for the security construction of crowded public places such as airports, subway stations, railway stations, and customs. At present, the security inspection equipment used in most transportation hubs is the X-ray security inspection system, which mainly conducts security inspections on luggage and items. It is required not only to detect hidden guns, ammunition, daggers and other dangerous weapons, but also to detect hidden explosives, some liquids and various Contraband. [00...

AI Technical Summary

Problems solved by technology

However, according to the exact reconstruction theory, the radiation source needs to rotate at least 180 degrees around the object, which greatly increases the cost of the equipment

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