On-board figure and image virtual-real superposition method

A technology of graphic image and superimposition method, which is applied in the direction of image communication, TV, color TV parts, etc., can solve the problems that the natural fusion of graphics and images cannot be achieved, and the texture information of graphics and images is not considered, so as to improve the situation and space perception ability and the effect of improving flight safety performance

Active Publication Date: 2015-03-25
AVIC NO 631 RES INST
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Problems solved by technology

The above three methods are all rigid overlays. They do not consider the unique texture...

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  • On-board figure and image virtual-real superposition method

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Embodiment Construction

[0019] Such as figure 1 As shown, the airborne graphic image virtual and real superposition method is divided into two parts: coarse-grained processing and fine-grained processing;

[0020] In the coarse-grained processing part: firstly, using the airborne GPS information, altitude information, aircraft attitude (pitch, roll, yaw) information, camera parameters (focal length, placement degrees of freedom) information, through spatial geometry three-dimensional coordinate transformation and The computer vision affine transformation equation quickly locates the shooting area of ​​the video image; and then uses this as a reference to read the same position and the same area range in the onboard database (in practical applications, this area range is larger than the area of ​​the video image captured by the camera) The elevation data and topographical landform data are drawn by the computer to generate corresponding graphics, and the observation angle is adjusted to be consistent ...

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Abstract

The invention provides an on-board figure and image virtual-real superposition method. The on-board figure and image virtual-real superposition method is efficient and high in precision. On the basis that data texture information is fully considered, natural fusion of two kinds of data including a virtual figure and a real image is achieved. The on-board figure and image virtual-real superposition method comprises the steps of conducting coarse-granularity processing, wherein relevant information of a real-time state is collected, a shooting area of a video image is rapidly positioned, altitude data and landform data at the same position within an adaptive area range in a on-board database are read, a corresponding figure is drawn through a computer, and an observation angle of view and a camera shooting angle of view are adjusted to be identical; conducting fine-granularity processing, wherein firstly, a feature detection algorithm is utilized, homonymy point feature information of the figure and the image is extracted, high-precision registration of the figure and the image is achieved, by means of an optimized interpolation algorithm, the figure data and the image data are fused, and then a result of figure and image virtual-real superposition is displayed.

Description

technical field [0001] The invention belongs to the field of airborne graphics and image processing, and relates to a virtual and real superimposition method of airborne graphics and images. Background technique [0002] The Enhanced Synthetic Vision System (ESVS), also known as the Enhanced Flight Vision System (EFVS), will provide a visual scene that is more in line with the observation mechanism of the human eye. visual information and prompts. It combines the advantages of Enhanced Vision System (EVS) and Synthetic Vision System (SVS), and its focus is to solve the problem of virtual and real superposition of graphics and images. [0003] There are three traditional superimposition methods of virtual and real graphics images: (1) fixed-position window superimposition, that is: a display window with a constant size is opened at a certain fixed position on the display interface to display video images; (2) background full-window superposition, namely : Cover the entire d...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04N5/262
Inventor 文鹏程牛文生谢建春程岳
Owner AVIC NO 631 RES INST
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