Sea-land clutter scene segmentation method based on ratio of amplitude to phase linearity

A technology of scene segmentation and linearity, applied in the field of communication, can solve the problems of uneven segmented images, poor robustness, etc., and achieve the effect of overcoming threshold selection, improving quality, and ensuring connectivity

Active Publication Date: 2020-01-31
XIDIAN UNIV
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Problems solved by technology

This method comprehensively utilizes the speckle noise suppression of wavelet transform, multi-scale analysis function and the adaptive and unsupervised characteristics of OTSU threshold algorithm, which has greatly improved the applicability of high-resolution SAR images, but there are still Inadequacies, because the method is still sensitive to noise, the robustness of the method is poor, and the segmented image is not uniform

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  • Sea-land clutter scene segmentation method based on ratio of amplitude to phase linearity
  • Sea-land clutter scene segmentation method based on ratio of amplitude to phase linearity
  • Sea-land clutter scene segmentation method based on ratio of amplitude to phase linearity

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] Step 1, the radar receiving scatterer returns a three-dimensional echo sequence containing pulse-distance-wave position.

[0039] Step 2, establish the distance-wave position coordinate system.

[0040] Convert the echo sequence into a grayscale image, and establish a distance-wave position coordinate system.

[0041] Step 3, select the range-wave position resolution unit.

[0042] Choose a point from the distance-wave position coordinate system, and form the distance-wave position resolution unit corresponding to the point.

[0043] Step 4, calculate the magnitude and phase linearity matrix.

[0044] Use the amplitude value formula to calculate the amplitude value of the selected range-wave position resolution unit;

[0045] The amplitude value formula is as follows:

[0046]

[0047] Among them, P k Indicates the amplitude value of the kth r...

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Abstract

The invention discloses a method for segmenting sea-land clutters on basis of a proportion of amplitude to phase linearity. The method comprises the following steps of: (1) obtaining an echo sequence;(2) establishing a distance-wave position coordinate system; (3) selecting a distance-wave position distinguishing unit; (4) calculating an amplitude and phase linearity matrix; (5) judging whether all the points in the distance-wave position coordinate system are selected or not, if the judging result is positive, executing step (6), and otherwise, executing step (3); (6) converting the amplitude and phase linearity matrix into a grayscale image; (7) generating a binary image; and (8) generating a sea-land clutter scene segmented image. According to the method, the proportion of the amplitude to the phase linearity is taken as measure, so that the differences of sea-land clutters under a mobile or static coherent system platform are sufficiently embodied; and sea-land clutter scenes aresegmented, so that more correct results are obtained.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a sea and land clutter scene segmentation method based on the ratio of amplitude to phase linearity in the technical field of radar signal processing. The present invention can be used to segment the sea and land clutter scene that separates the ocean and land areas in the image generated by the echo data acquired by the airborne radar. Background technique [0002] The target detection technology in the background of sea clutter is a crucial research direction in radar application technology, and it is widely used in military and civilian fields. When the radar works in the sea-facing mode, the scanning scene is complex and has a large range. The radar echoes often contain various types of clutter, including sea clutter, ground clutter, island and reef clutter, and offshore clutter. The strong echo intensity of ground clutter and island reef clutter seriously affect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/11G06T7/136
Inventor 水鹏朗梁寒黄宇婷张帅
Owner XIDIAN UNIV
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