A method for correcting distorted images of backscattered X-ray human body safety inspection equipment
A technology of human body safety inspection and image correction, which is applied in image enhancement, image data processing, graphics and image conversion, etc., to achieve the effect of improving the visual effect of images
Active Publication Date: 2017-01-25
THE FIRST RES INST OF MIN OF PUBLIC SECURITY +1
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[0005] The purpose of the present invention is to provide a method for correcting the distorted image of backscattered X-ray human body safety inspection equipment that can overcome the above-mentioned technical problems. Due to the image distortion of the existing equipment, the inspection efficiency of security personnel is reduced, missed judgments, misjudgments, etc.
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[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0031] refer to figure 1 A flowchart of a method for correcting distorted images of backscattered X-ray human body safety inspection equipment according to the present invention, the method of the present invention mainly includes the following steps:
[0032] 1) Step S1, designing a backscattered X-ray human body safety inspection equipment image correction template Rectify Template , and to Rectify Template Imaging, get the corrected template image Img ori ;
[0033] 2) step S2, to Img ori Perform preprocessing to extract the effective imaging area Img of the human body image valid , wherein the preprocessing method consists of three parts: image filtering, image stretching, image edge detection and segmentation;
[0034] 3) Step S3, for Img valid , firstly carry out horizontal grayscale accumulation and mean value projection calculation in t...
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The invention discloses a distorted image rectification method of back scattering X-ray huma body safety check equipment. The distorted image rectification method comprises the following steps of 1) designing a back scattering X-ray huma body safety check equipment image rectification template RectifyTemplate, and imaging the RectifyTemplate to obtain a to-be-rectified template image Imgori, 2) preprocessing Imgori and extracting the effective imaging region Imgvalid of a human body image, 3) for Imgvalid, firstly, carrying out transverse gray accumulation and mean-value projection calculation in a horizontal direction and performing minimum on gray accumulation in each row and a mean value curve, 4) rectifying in the horizontal direction with reference to the width of the row of pixels Centrecow in the widest position in the horizontal direction of Imgvalid, and 5) rectifying in the vertical direction with reference to the width widthcow of a grid in the horizontal direction at Centrecow on the basis of Imgrec_h. The distorted image rectification method realizes effectively rectification of the distorted image so that the visual effect of the image is greatly improved; the scale of the rectified image is well united with the scale of the shape of the human body, and therefore, a good foundation is laid for the security personnel to interpret images more effectively and accurately.
Description
technical field [0001] The invention relates to a method for correcting distorted images of backscattered X-ray human body safety inspection equipment, and belongs to the technical field of backscattered X-ray imaging safety inspections. Background technique [0002] In recent years, more and more activities such as drug trafficking and terrorism have appeared in the form of hiding in the human body. Drug smuggling and terrorist attacks using the human body have made threats and dangers more hidden. The severe situation has put forward stricter requirements for human body safety inspection technology In this context, backscattered X-ray imaging technology has received more and more attention in the field of human security inspection technology because of its non-contact, low radiation dose, and sensitivity to low atomic number substances. The surface image of the human body is shown in the form of a photo, which can not only effectively detect metal objects, but also detect ...
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IPC IPC(8): G06T5/00G06T3/40
Inventor 孔维武邢羽
Owner THE FIRST RES INST OF MIN OF PUBLIC SECURITY