US 9,542,624 B2Granted

Recognizing method of flaky or blocky prohibited articles, explosives or drugs

AssigneesTsinghua University, Nuctech Company Limited

InventorsLi Zhang, Qingping Huang, Yunda Sun, Lei Lei, Zhi Tang

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Abstract

The present invention discloses recognizing methods of flaky or blocky prohibited articles, explosives or drugs. Specifically, the method for recognizing flaky prohibited articles, explosives or drugs comprises steps of: (1) reading in tomogram data of an object to be inspected for one tomogram; (2) pre-processing the tomogram data; (3) splitting the pre-processed tomogram data into a plurality of regions that have similar physical properties; (4) analyzing whether each of the split regions is a flaky region; (5) determining whether the flaky region recognized in the current tomogram can be merged with the flaky region detected from the previous tomogram, so as to form a flaky target; (6) determining whether each detected flaky target is complete or finished; (7) repeating steps (1)-(6) and processing each tomogram data layer by layer, until all of the tomogram data have been processed.

Claims9

Dependent claims

A method for recognizing blocky prohibited articles, explosives or drugs, characterized in that, comprising steps of:

(1) reading in tomogram data for one tomogram of an object to be inspected;
(2) pre-processing the current tomogram data;
(3) splitting the pre-processed tomogram data into a plurality of regions that have similar physical properties;
(4) as for each split region, physical property thereof is searched in a database of prohibited articles, explosives or drugs, wherein if the physical property searched is prohibitive, then the split region is recognized as an effective blocky region;
(5) determining whether the blocky region recognized in the current tomogram can be merged with the blocky region detected from the previous tomogram, so as to form a blocky target;
(6) determining whether each detected blocky target is finished or complete;
(7) repeating steps (1)-(46) and processing each tomogram data layer by layer, until all of the tomogram data have been processed.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/074,270Filed 18 Mar 2016 · division
Priority: CN 2013 1 00412931 Feb 2013
Published: US 2016/0314378 A127 Oct 2016
Granted: 10 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

G01V 5/226
Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays: using tomography
G06F 18/24
Analysing: classification techniques
G06T 7/40
Image analysis: analysis of texture
G06T 7/60
Image analysis: analysis of geometric attributes

Family

Application14/162,225Parent of this division · filed 23 Jan 2014
US 2016/0314378 A1Pre-grant publication · published 27 Oct 2016
US 9,449,399 B2Parent of this division
US 2014/0219501 A1Published application
US 9,542,624 B2This patent

From the US filing history. Foreign family members aren’t listed.