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A method and device for extracting spatial object features

A technology of space target and feature extraction, applied in character and pattern recognition, instrument, calculation, etc., can solve problems such as the difficulty of extracting the main axis and the axis of the solar panel

Active Publication Date: 2020-10-13
BEIJING INST OF ENVIRONMENTAL FEATURES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, it is a relatively difficult problem to extract the characteristics of the main axis of the space object and the axis of the solar panel

Method used

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  • A method and device for extracting spatial object features
  • A method and device for extracting spatial object features
  • A method and device for extracting spatial object features

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] figure 1 It is a schematic flow chart of the main flow of the spatial object feature extraction method in Embodiment 1 of the present invention. Such as figure 1 As shown, the spatial object feature extraction method provided by the embodiment of the present invention includes:

[0031] Step S101 , performing Radon transformation on the image of the space object to obtain a transformed image.

[0032] Radon transform (Radon transform), is an integral transform. In the two-dimensional case, the Radon transform can be understood as follows: the image f(x, y) of the space object is line-integrated along different straight lines in a plane, and the result obtained is the image after Radon transform.

[0033] Step S102, performing extremum point detection on the transformed image to determine the direction of at least one axis of the spatial object.

[0034] Step S103, extracting contour information of the spatial object according to an edge detection algorithm.

[0035...

Embodiment 2

[0040] figure 2 It is a schematic flowchart of the main flow of the method for extracting spatial object features according to Embodiment 2 of the present invention. Such as figure 2 As shown, the spatial object feature extraction method provided by the embodiment of the present invention includes:

[0041]Step S201, preprocessing the image of the space object.

[0042] Exemplarily, the preprocessing includes: converting the original image of the space target (such as an ISAR image) into a grayscale image, and then performing median filtering on the grayscale image. During specific implementation, the original image of the space target is a color image, the unit of the function value of each point is db, and the function value of each point of the converted grayscale image is the grayscale value of the pixel point, and its value The range is 0 to 255. In the embodiment of the present invention, background noise in the image can be suppressed by performing filtering proce...

Embodiment 3

[0109] Figure 4 It is a schematic diagram of the main modules of the spatial object feature extraction device according to Embodiment 3 of the present invention. Such as Figure 4 As shown, the spatial object feature extraction device 400 provided by the embodiment of the present invention includes: a transformation module 401 , a detection module 402 , an extraction module 403 , and a determination module 404 .

[0110] The transformation module 401 is configured to perform Radon transformation on the image of the space object to obtain a transformed image.

[0111] Radon transform (Radon transform), is an integral transform. In the two-dimensional case, the Radon transform can be understood as follows: the image f(x, y) of the space object is line-integrated along different straight lines in a plane, and the result obtained is the image after Radon transform.

[0112] The detection module 402 is configured to perform extreme point detection on the transformed image, so a...

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Abstract

The invention provides a method and device for extracting spatial object features, which relate to the technical field of image feature extraction. Wherein, the method includes: performing Radon transformation on the image of the space object to obtain a transformed image; performing extreme point detection on the transformed image to determine the direction of at least one axis of the space object; according to the edge detection algorithm Extracting contour information of the space object; determining the endpoint of the axis according to the direction of at least one axis of the space object and the contour information of the space object. Through the above steps, the axis features of the space target can be accurately extracted, providing technical support for the space target structure design and attitude recognition.

Description

technical field [0001] The invention relates to the technical field of image feature extraction, in particular to a method and device for extracting spatial object features. Background technique [0002] The ISAR (Inverse Synthetic Aperture Radar) image of a space target is the projected image of each strong scattering point of the target in the lateral and radial directions, which more intuitively reflects the shape and structure of the target. Therefore, the outline of the target can be directly extracted from the ISAR image, which provides an effective basis for the judgment of the approximate shape of the target. [0003] A space target generally consists of a main body, a rectangular solar panel, and antennas of different shapes. Among them, each component has local symmetry, and the space object as a whole is approximately symmetrical about the main axis. Since the main axis and solar panel axis of a space target play a key role in target structure estimation and att...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/46
CPCG06V10/443G06V10/457
Inventor 霍超颖李晨光邢笑宇徐高贵
Owner BEIJING INST OF ENVIRONMENTAL FEATURES