An X-ray Security Inspection Image Enhancement Method Based on Area Adaptive Processing
A security inspection and image enhancement technology, applied in image enhancement, image data processing, instruments, etc., can solve the problem of difficult to achieve image penetration, and achieve the effect of clear image visual effect, simple algorithm and fast processing speed.
Active Publication Date: 2017-02-01
THE FIRST RES INST OF MIN OF PUBLIC SECURITY +1
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However, due to the particularity and complexity of security inspection images, it is difficult for the above conventional image enhancement methods to meet the requirements of improving image penetration, detail resolution and contrast at the same time. The grayscale transformation method is suitable for improving the penetration of low grayscale areas of images improve the overall contrast of the image; the spatial information transformation method is suitable for improving the resolution of image details and the contrast of local areas of the image, but these methods are difficult to achieve the purpose of improving image penetration, detail resolution and contrast at the same time
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[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. Such as figure 1 as shown,
[0032] refer to figure 1 A flow chart of an X-ray security inspection image enhancement method based on area self-adaptive processing in the present invention, after obtaining the inspected package image f(x, y) collected by X-ray security inspection equipment, the method of the present invention mainly includes the following step:
[0033] 1) Step S1, perform piecewise nonlinear grayscale transformation on the image f(x,y) to obtain the grayscale transformed image f tran (x,y);
[0034] 2) In step S2, the image f(x, y) is subjected to mean value filtering processing of templates of different scales to obtain the filtered image f mean (x,y);
[0035] 3) Step S3, using image f(x,y) and image f mean (x, y), through the following calculation formula, the high-frequency information image f is obtained high (x,y):
[003...
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The invention discloses an X-ray safety inspection image enhancing method based on region self-adaptive processing, capable of overcoming the above-mentioned technical problems.Based on an image region self adaptive processing principle, according to different local region information characteristics in images, the images are automatically enhanced at different parameters and in different processing modes, the goals of simultaneously improving the image low-gray-level region penetrating power, improving the image detail resolution and improving the image contrast ratio are achieved, so the quality of X-ray safety inspection images is obviously improved, and the visual effect of the images is obviously clear. Compared with the prior art, the method has the characteristics that when the method is used for enhancing the images, the processing speed is high, the algorithm is simple, the enhancing effect is clear, meanwhile, the amplification effect of a conventional image enhancing method on the image noise is effectively inhibited, and the method provided by the invention is particularly suitable for the technical field of X-ray safety inspection with great data processing quantity and high real-time performance requirements.
Description
technical field [0001] The invention relates to an X-ray safety inspection image enhancement method based on area self-adaptive processing, and belongs to the technical field of X-ray transmission imaging safety inspection image processing. Background technique [0002] At present, X-ray transmission imaging technology has been widely used in the field of security inspection. The basic principle is that when X-rays are used to irradiate a package to be inspected, usually, due to the different characteristics of the object in the package, such as composition, density, size, quantity, etc. Similarly, the attenuation ability to X-rays is also different. When the remaining X-rays irradiate the detection device, scanning images with different pixel gray values are formed for inspection personnel to observe and interpret. However, due to the complexity of the inspected package, as well as the influence of various unfavorable factors such as X-ray scattering, photon noise, and sy...
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IPC IPC(8): G06T5/00
Inventor 孔维武李东董明文杨立瑞李宏伟
Owner THE FIRST RES INST OF MIN OF PUBLIC SECURITY