Infrared polarization imaging method based on aerial moving platform
An infrared polarization and motion platform technology, applied in the field of optical measurement, can solve the problems of inability to obtain polarization information, inability to apply motion platform, and real-time detection of polarization information of moving targets.
Inactive Publication Date: 2015-09-09
NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY
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[0004] The timing measurement method adopts the structure of rotating polarizing element or adopts electro-optic, acousto-optic, magneto-optic and other modulation methods to obtain at least four polarization images in different polarization directions in sequence according to time sequence, and obtain the polarization characteristics of the target, which can be applied on a moving platform or shooting a moving target When the four polarization images taken by this method cover different areas, all the polarization information of the target cannot be obtained. Therefore, this method cannot be applied to the moving platform or cannot detect the polarization information of the moving target in real time.
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[0025] Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail:
[0026] (1) Set up an infrared polarization camera, add a rotatable polarizer or a controllable liquid crystal before the thermal infrared camera, by rotating the polarizer or controlling the liquid crystal, the thermal infrared camera can obtain the polarized image I of the target 0 , I 45 , I 90 , that is, the target horizontally polarized, diagonally polarized, and vertically polarized images. Since the circularly polarized light component of the target is almost zero in the natural background, the circularly polarized light is not considered in the present invention. Angle can be chosen arbitrarily, as long as choose different three angles; But considering the sensitivity of general polarizer, the angle difference of choosing will be greater than 30 ° and less than 60 °,, I 0 , I 60 , I 120 it is also fine.
[0027] (2) Arrange the for...
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The invention provides an infrared polarization imaging method based on an aerial moving platform. The method comprises the following steps of 1) adding a rotary polarizing film or a controllable liquid crystal in the front of a thermal infrared camera, and enabling the thermal infrared camera to obtain polarization images of a target through rotating the polarizing film or controlling the liquid crystal; 2) arranging the thermal infrared camera formed in the step 1) into the aerial moving platform; 3) arranging the shooting frequency of the thermal infrared camera according to the kinematic velocity of the aerial moving platform and a ground area covered by a field of view of the thermal infrared camera; 4) shooting the polarization images of the ground target in sequence under the condition that the aerial moving platform keeps uniform motion; and 5) splicing the polarization images of the ground target to enable the overage areas of the polarization images to be the same. The invention provides the infrared polarization imaging method based on the aerial moving platform and applies a splicing technology for the polarization images, so that accurate real-time polarization measurement of a large-area target on the ground can be completed on the aerial moving platform.
Description
technical field [0001] The invention relates to an optical measurement method, in particular to an image mosaic infrared polarization detection method based on an aerial motion platform. Background technique [0002] Any target on the ground and in the atmosphere will produce polarization characteristics determined by their own properties and the basic laws of optics in the process of reflecting or radiating electromagnetic waves. Different objects or different states of the same object (such as roughness, water content, composition of materials) Physical and chemical characteristics, etc.) will produce different polarization states. Infrared camouflage technology, by reducing or distorting the thermal radiation characteristics of the target surface, makes the target have a lower gray value in the infrared radiation intensity map, and achieves the purpose of camouflaging the target in the infrared band. However, the polarization state of the reflected and radiated light wav...
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Inventor 谢永杰张华良马冠军赵岩唐佩佳焦姣
Owner NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY