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Device and method for extracting aircraft target candidate region in airborne optical image

A technology for aircraft targets and candidate areas, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as difficulty in ensuring validity, submersion, and difficulty in extracting texture and shape information, achieving fast speed, small amount of calculation, Easily hardware-accelerated effects

Pending Publication Date: 2021-10-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at the same time, the problem is that with the massive use of drones, the security of the national airspace system is under unprecedented threat
However, different from the extraction of aircraft target candidate areas in remote sensing images, the extraction of aircraft target candidate areas in airborne optical images has the following difficulties, which are specifically reflected in: 1) The background of aircraft targets during flight is very complex, usually including Lots of movement and cluttered ground cover, so aircraft targets tend to get lost in complex backgrounds
2) There are large changes in scale and attitude of aircraft targets during flight, so it is difficult to extract effective texture and shape information
Therefore, it is difficult to ensure the effectiveness of direct application of circular filters to aircraft target detection in airborne optical images

Method used

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  • Device and method for extracting aircraft target candidate region in airborne optical image
  • Device and method for extracting aircraft target candidate region in airborne optical image
  • Device and method for extracting aircraft target candidate region in airborne optical image

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Embodiment 1

[0055] Such as figure 1 As shown, in the embodiment of the present invention, aiming at the characteristics of aircraft targets in airborne photoelectric images, a method for extracting aircraft target candidate regions in airborne photoelectric images is provided, including:

[0056] Step S100: using a circular filter to calculate the filtering result of the original airborne image containing the aircraft target;

[0057] Such as figure 2 As shown, further, in step S100, may include:

[0058] Step S101, selecting the radius R of the circular filter according to the airborne camera parameters and the size of the aircraft target;

[0059] Such as image 3 As shown in , the original airborne electro-optical image containing the aircraft target containing the candidate region to be extracted is shown.

[0060] Specifically, the circular filter radius R satisfies, and Described f, D, length, width represent the focal length of airborne camera respectively, hope to detect ...

Embodiment 2

[0098] An embodiment of the present invention provides a device for extracting aircraft target candidate areas in an optical image, such as Figure 7As shown, it includes: a circular filter module 210, which is used to calculate and obtain the filtering result according to the circular filter; an aircraft target roughly determining module 220, which is used to determine the approximate area where the aircraft is located according to the filtering result; an image segmentation module 230, which is used to use the image The segmentation algorithm further divides the region where the roughly determined target is located into target and background; the sliding window size acquisition module 240 is used to determine the size range of the sliding window in the image block according to the airborne camera parameters and the actual size of the aircraft; the sliding window The score calculation module 250 is used to calculate the score of each window in the size of the sliding window by...

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Abstract

The invention discloses a device and a method for extracting an aircraft target candidate region in an airborne optical image. The device comprises a filtering result acquisition module, an aircraft target rough determination module, an image segmentation module, a sliding window range determination module, a window score calculation module, a non-maximum suppression module and an aircraft target candidate region extraction module. The method includes: according to a filtering result obtained by the circumference filter, roughly determining an area where the aircraft target is located, further segmenting the rough area where the aircraft target is located into a target and a background by using an image segmentation algorithm based on a graph theory, and according to a segmentation result, calculating the possibility that the image block contains the target by designing a score calculation index of the image block; and completing the extraction of the aircraft target candidate region through the combination of the target image blocks. The method is small in calculation amount, high in speed, easy for hardware acceleration and suitable for complex backgrounds.

Description

technical field [0001] The invention relates to the technical field of positioning, navigation and control, in particular to a device and method for extracting aircraft target candidate areas in airborne optical images. Background technique [0002] In recent years, due to the broad prospects of UAVs in intelligence, monitoring, reconnaissance, etc., and their lower cost and more flexible use compared with manned UAVs, UAVs have received unprecedented attention in both military and civilian applications. s concern. However, the problem that exists at the same time is that with the massive use of drones, the security of the national airspace system is experiencing unprecedented threats. Therefore, how to safely integrate drones into the national system and share the airspace with manned aircraft has become a problem that must be solved, and the perception and avoidance system equipped on drones plays a crucial role in this process. Role. [0003] The working process of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/11G06T7/136G06K9/32
CPCG06T7/11G06T7/136G06T2207/20104G06T2207/20021G06T2207/10032
Inventor 曹云峰张传奇张洲宇马宁丁萌庄丽葵
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS