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Dim point target extraction method and device of infrared remote sensing image

A technology of target extraction and remote sensing image, applied in image enhancement, image analysis, image data processing and other directions, can solve the problem that single frame image processing cannot achieve reliable target detection and target submersion

Active Publication Date: 2014-03-26
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

[0004] At present, the main difficulty in the detection of small targets with low signal-to-noise ratio is: under low signal-to-noise ratio, the target is easily overwhelmed by noise, and single-frame image processing can no longer achieve reliable detection of targets

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  • Dim point target extraction method and device of infrared remote sensing image
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  • Dim point target extraction method and device of infrared remote sensing image

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing, the present invention is described in further detail, in conjunction with figure 2 diagram of the installation and figure 1 In summary, the implementation of this method can be divided into three steps:

[0035] 1. Sequential infrared image registration

[0036] 1.1 In the embodiment, the image of the infrared weak point target image using 10-frame sequence imaging is denoted as n 1 …n 10 .

[0037] 1.2 Front and back adjacent image registration

[0038] 1.2.1 put n 10 and n 9 Each of the two frames of images is divided into 8 rows and 8 columns, and 64 sub-blocks. Depend on Calculate the entropy of each subblock. Among them, N is the number of gray levels of the image, p i Indicates the probability that a pixel with gray level i appears in the image. in n 10 and n 9 Select the first 32 sub-blocks with the largest entropy as the regions to be matched;

[0039] 1.2.2 Using the normalized cross-correlation ma...

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Abstract

The invention provided a dim point target extraction method and device of an infrared remote sensing image. The extraction device includes an image registration module, a background clutter suppression module, and a point target extraction module; the image registration module registers a to-be-processed infrared sequence image to get an infrared sequence image after registration; the background clutter suppression module carries out background clutter suppression of the infrared sequence image after registration; and the point target extraction module carries out image data superposition of the infrared sequence image after the background clutter suppression, so as to obtain a point target with an enhanced signal-to-noise ratio. The method of the invention can improve the dim point target signal-to-noise ratio of the infrared remote sensing image and increase the detection probability.

Description

technical field [0001] The invention belongs to the field of infrared image processing, and relates to an infrared remote sensing image weak target extraction device and method thereof. Based on the image sub-block area matching and registration technology, the device suppresses the background clutter of the infrared image system through the time-domain filtering method, and adopts the method of multi-frame superposition to realize the accumulation of signal energy along the target motion trajectory, so as to improve the signal-to-noise ratio of the point target purpose, and then extract the point target. Using this method can improve the signal-to-noise ratio of weak targets in infrared remote sensing images and increase the detection probability. Background technique [0002] In recent years, the detection of point targets with low signal-to-noise ratio in images has been a research hotspot in the field of optical and infrared images. The so-called point target refers to...

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Application Information

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IPC IPC(8): G06T7/20G06T5/10G06T5/50
Inventor 邢坤岳春宇何红艳周楠鲍云飞齐文雯李岩李方琦刘爽
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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