Multi-scale scene matching area selecting method

Abstract

A multi-scale scene matching area selecting method obtains a plurality of reference images of the same scene area with different scales. When an aircraft flies, an image sensor on the aircraft obtains real-time images of grounds right under the aircraft. Then reference sub-images as large as one of the to-be-matched real-time images are cut out from the obtained reference images, and the method determines if the cut-out reference sub-images satisfy the requirements of indices. If the cut-out reference sub-images obtained from the reference images with different scales are all corresponding to the same area, the area is the scene matching area. The scene matching areas selected with the method are characterized by providing a large amount of information, having significant features and good adaptability, being highly resistant to interference, and the like. The method selects the scene matching area based on the reference images with different scales while maintaining the size of the real-time image, and the sub-images of the scene matching area on all scales satisfy the index requirements, and thus the scene matching area has strong robustness.

Description

technical field [0001] The invention relates to the technical field of scene matching in aircraft integrated navigation, in particular to a method for selecting a multi-scale scene matching area. Background technique [0002] Scene matching is a new technology developed on the basis of aerospace technology, satellite application technology, sensor technology, computer technology, image processing and pattern recognition. It has important application value in military fields such as terminal guidance, image target search and tracking. In the end-guidance of cruise missile scene matching, the reference image is the digital map information at the end-guidance stage of the scheduled flight path of the missile, which is derived from satellite photos or aerial photos; the real-time image is real-time by the airborne sensor when the missile flies over the target area. Gets the scene characteristics of the ground directly below. The quality of the reference image is one of the imp...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problems in the prior art that only consider the matching performance on a certain scale when selecting the matching area, and even have no quantitative matching index, resulting in poor adaptability and poor robustness of the selected matching area, etc. Provide a selection method of multi-scale scene matching area

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