Tsinghua University

Chinese Academy of Sciences

Nuctech Company Limited

Beijing Hualixing Sci-tech Development Co., Ltd.

Xilong Liu

Chao Zhou

Min Tan

Jie Zhao

Liming Wang

Zhiqiang Cao

Haibo Qu

Kun Ai

An apparatus and method for quick imaging and inspection of a moving target. The apparatus comprises a passage, a scanning and imaging device (), a first position sensor (), a second position sensor (), and a control unit (). The control unit () powers on an electron induction accelerator in the scanning and imaging device () to make the electron induction accelerator enter a standby state when the control unit () receives from the first position sensor () a detection signal indicating that a moving target () enters the passage, and controls a beam emitting time point and a beam emitting mode of the electron induction accelerator to correspondingly inspect different parts of the moving target () when the second position sensor () detects that different sections pass through a radiation scanning area. The driver and passengers do not need to get off when a traveling vehicle is inspected, the apparatus controls the accelerator to emit ray beams with corresponding energy to perform scanning when the moving target passes through the scanning area, flexible scanning is realized, and inspection time is reduced.

Apparatus and method for inspecting moving target

The disclosure relates to a method for detection of the horizontal and gravity directions of an image, the method comprising: selecting equidistant sampling points in an image at an interval of the radius of the sampling circle of an attention focus detector; placing the center of the sampling circle of the attention focus detector on each of the sampling points, and using the attention focus detector to acquire attention focus coordinates and the corresponding significant orientation angle, and all the attention focus coordinates and the corresponding significant orientation angles constitute a set &#x3a9;; using an orientation perceptron to determine a local orientation angle and a weight at the attention focus according to the gray image information, and generating a local orientation function; obtaining a sum of each of the local orientation functions as an image direction function; obtaining a function M(&#x3b2;), and further obtaining the horizontal and gravity identification angles.

Method for detecting horizontal and gravity directions of an image

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Beijing, China

Xilong Liu