Millimeter wave passive image enhancement method based on target polarization radiation characteristics

Abstract

The invention discloses a millimeter wave passive image enhancement method based on target polarization radiation characteristics. The method is used for processing a millimeter wave passive image I picture and a millimeter wave passive image Q picture with polarization radiation characteristics, and the method comprises the steps: characteristic target extraction: according to the millimeter wave polarization radiation characteristics of a typical target, characteristic target extraction is performed on the polarization radiation image I picture and the polarization radiation image Q picture, and a background I' picture, a background Q' picture, a target I' picture and a target Q' picture are obtained respectively; image fusion: the background I' picture and the background Q' picture are fused to obtain a new background F' picture, the target I' picture and the target Q' picture are fused to obtain a new target F' picture, and the new background F' picture and the new target F' picture are fused to obtain a final F picture. According to the invention, the characteristic target can be effectively extracted according to the polarization radiation characteristics of the typical target, a multi-scale transformation image processing technology is utilized to image fusion, polarization information in the millimeter wave passive image is fully utilized, so that the polarization information can be centralized and enriched, and the enhancement effect of the polarization image can be realized finally.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of combining millimeter-wave passive imaging and image processing, and in particular relates to a millimeter-wave passive image enhancement method based on target polarization radiation characteristics. Background technique [0002] The millimeter-wave radiation imaging technology uses a millimeter-wave radiometer to record the radiation temperature distribution of the measured scene, and displays it in the form of a grayscale image or a pseudo-color image. The millimeter wave radiometer does not emit electromagnetic waves, but receives the electromagnetic radiation of the measured scene in the millimeter wave band and converts it into a low-frequency signal to characterize the difference in the radiation capabilities of different objects in the measured scene. Similar to infrared imaging, millimeter-wave radiation imaging is a thermal imaging technology that can work around the clock. In ...

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Problems solved by technology

However, the above methods are all intended to reduce the noise of the millimeter-wave passive image, improve the image contrast, and highlight the imaging target. There is a lack of research on the polarization radiation characteristics of the target, and the polarization information of the millimeter-wave passive image is not fully utilized.

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