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Method and device for establishing classification curve in substance identification system

A technology for classifying curves and identifying systems, applied in the field of radiation imaging, to achieve high practical value, reduce statistical fluctuations, and improve security inspection capabilities

Active Publication Date: 2013-09-04
NUCTECH CO LTD +1
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Problems solved by technology

[0009] The invention proposes a material identification system based on an energy spectrum shaping device and an automatic calibration device, which solves the problem of real-time and effective material identification in the high-energy X-ray dual-energy imaging container inspection system, and uses dual-energy grayscale fusion and colorization at the same time Algorithms to visualize material resolution and grayscale information

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  • Method and device for establishing classification curve in substance identification system
  • Method and device for establishing classification curve in substance identification system
  • Method and device for establishing classification curve in substance identification system

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Embodiment Construction

[0077] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the description process, details and functions that are not necessary for the present invention are omitted to prevent confusion about the understanding of the present invention.

[0078] The substance identification device according to the embodiment of the present invention includes a hardware part and a data processing algorithm. The substance identification equipment is a sub-system embedded in the high-energy X-ray dual-energy imaging container inspection system, which distinguishes materials based on the high-energy dual-energy transmission data.

[0079] For the convenience of description, the high-energy rays in the dual-energy high-energy X-ray are referred to as high-energy X-rays, and the low-energy rays are low-energy X-rays. The reasonable choice of energy range is the premise of the high-energy X-ray dual-energy imaging container ...

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Abstract

The invention discloses a method and device for establishing a classification curve in a substance identification system, wherein the method comprises the following steps: for each calibrating material among a plurality of calibration materials, irradiating the calibrated materials of different thicknesses by high-energy rays and low-energy rays, thus obtaining the corresponding high-energy transparency and low-energy transparency; regarding a first function of the high-energy transparency as a transverse coordinate and regarding a second function of both the low-energy transparency and the high-energy transparency as a longitudinal coordinate, so as to form the points of the calibration materials of different thicknesses; and forming the classification curve based on the points. According to the invention, the transmission images of a detected object can be obtained, and the material information in the detected object also can be obtained.

Description

[0001] This application is a divisional application of the invention patent application No. 200710177405.2 entitled "Methods and Equipment for Substance Identification" filed to the Chinese Patent Office on November 15, 2007. Technical field [0002] The present invention relates to radiation imaging technology, in particular to a substance identification method and equipment applied to a high-energy X-ray dual-energy imaging inspection system, which can not only obtain a transmission image of an inspected object, but also obtain material information in the inspected object. Background technique [0003] Transporting in containers is a modern and advanced mode of transportation. Containerization has become a major trend in international cargo transportation. At the same time, the use of container smuggling, smuggling of guns, weapons, drugs, explosives and even weapons of mass destruction (WMDs) and radiological dispersal devices (RDDs) has become a problem for governments, Inter...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/04G01N23/087
Inventor 陈志强张丽康克军王学武黄清萍李元景刘以农赵自然肖永顺
Owner NUCTECH CO LTD
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