Multi-energy spectrum x-ray imaging systems and methods for recognizing article using multi-energy spectrum x-ray imaging system

Patent metadata

Field	Value
Publication number	US-10646179-B2
Application number	US-201715720502-A
Country	US
Kind code	B2
Filing date	Sep 29, 2017
Priority date	Dec 7, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

The present disclosure provides a method for recognizing an article using a multi-energy spectrum X-ray imaging system and a multi-energy spectrum X-ray imaging system. The method comprises: recognizing an application scenario and/or priori information of the article; selecting a parameter mode suitable for the article from a plurality of parameter modes stored in the multi-energy spectrum X-ray imaging system based on the recognized application scenario and/or priori information; and recognizing the article using the selected parameter mode, wherein the plurality of parameter modes are obtained by optimizing system parameters of the multi-energy spectrum X-ray imaging system under a specific condition using a training sample library for various articles.

First claim

We claim:

1. A method for recognizing an article using a multi-energy spectrum X-ray imaging system, comprising;
recognizing an application scenario and/or priori information of the article;
selecting a parameter mode suitable for the article from a plurality of parameter modes stored in the multi-energy spectrum X-ray imaging system based on the recognized application scenario and/or priori information, wherein the plurality of parameter modes comprise a common parameter mode and a high performance parameter mode; and
recognizing the article using the selected parameter mode,
wherein the plurality of parameter modes are obtained by optimizing system parameters of the multi-energy spectrum X-ray imaging system under a specific condition using a training sample library for various articles.

2. The method according to claim 1 , wherein the specific condition comprises a highest detection rate, a lowest false positive rate, or largest discriminability.

3. The method according to claim 1 , wherein the system parameters comprise: an energy value of an X-ray source, a number of divided energy regions and a corresponding energy threshold, a scanning speed, and a radiation dose value.

4. The method according to claim 1 , wherein the plurality of parameter modes comprise a first parameter mode for baggage and human body inspection and a second parameter mode for vehicles/containers.

5. The method according to claim 1 , further comprising:
switching the selected parameter mode from the common parameter mode to the high performance parameter mode, when the selected parameter mode is the common parameter mode and it is recognized that there is a high probability of the article being a prohibited article using the selected parameter mode.

6. A multi-energy spectrum X-ray imaging system for recognizing an article, comprising:
an X-ray source configured to generate X-rays under the control of a scanning controller;
the scanning controller configured to control the X-ray source according to a selected parameter mode;
a detector configured to receive X-rays which are emitted from the X-ray source and are transmitted or scattered through the article and convert them into an output signal;
a processor configured to: recognize an application scenario and/or priori information of the article, select a parameter mode suitable for the article from a plurality of parameter modes stored in the multi-energy spectrum X-ray imaging system based on the recognized application scenario and/or priori information, wherein the plurality of parameter modes comprise a common parameter mode and a high performance parameter mode, and a high performance parameter mode, and receive an output signal from the detector and recognize the article using the output signal; and
a memory configured to store the plurality of parameter modes,
wherein the plurality of parameter modes are obtained by optimizing system parameters of the multi-energy spectrum X-ray imaging system under a specific condition using a training sample library for various articles.

7. The system according to claim 6 , wherein the specific condition comprises a highest detection rate, a lowest false positive rate, or largest discriminability.

8. The system according to claim 6 , wherein the system parameters comprise: an energy value of an X-ray source, a number of divided energy regions and a corresponding energy threshold, a scanning speed, and a radiation dose value.

9. The system according to claim 6 , wherein the plurality of parameter modes comprise a first parameter mode for baggage and human body inspection and a second parameter mode for vehicles/containers.

10. The system according to claim 6 , wherein the processor is further configured to switch the selected parameter mode from the common parameter mode to the high performance parameter mode, when the selected parameter mode is the common parameter mode and it is recognized that there is a high probability of the article being a prohibited article using the selected parameter mode.

11. A non-transitory computer-readable medium comprising instructions that, when executed by a processor, perform operations of:
recognizing an application scenario and/or priori information of the article;
selecting a parameter mode suitable for the article from a plurality of parameter modes stored in the multi-energy spectrum X-ray imaging system based on the recognized application scenario and/or priori information, wherein the plurality of parameter modes comprise a common parameter mode and a high performance parameter mode; and
recognizing the article using the selected parameter mode,
wherein the plurality of parameter modes are obtained by optimizing system parameters of the multi-energy spectrum X-ray imaging system under a specific condition using a training sample library for various articles.

12. The non-transitory computer-readable medium according to claim 11 , wherein the specific condition comprises a highest detection rate, a lowest false positive rate, or largest discriminability.

13. The non-transitory computer-readable medium according to claim 11 , wherein the system parameters comprise: an energy value of an X-ray source, a number of divided energy regions and a corresponding energy threshold, a scanning speed, and a radiation dose value.

14. The non-transitory computer-readable medium according to claim 11 , wherein the plurality of parameter modes comprise a first parameter mode for baggage and human body inspection and a second parameter mode for vehicles/containers.

15. The non-transitory computer-readable medium according to claim 11 , further comprising instructions that, when executed by a processor, perform operations of: switching the selected parameter mode from the common parameter mode to the high performance parameter mode, when the selected parameter mode is the common parameter mode and it is recognized that there is a high probability of the article being a prohibited article using the selected parameter mode.

Assignees

• Nuctech Co Ltd

Inventors

• Xu Guangming
• Liu Bicheng
• Zhao Ziran
• Zhang Lan
• Gu Jianping

Classifications

• A61B6/06

  Diaphragms · CPC title

• G01N23/04 Primary

  and forming images of the material · CPC title

• G01N2223/1016

  X-ray · CPC title

• A61B6/482 Primary

  involving multiple energy imaging · CPC title

• A61B6/4241

  using energy resolving detectors, e.g. photon counting · CPC title