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Tidal creek extraction method based on a high-resolution remote sensing image

A technology of remote sensing images and extraction methods, applied in the field of remote sensing

Active Publication Date: 2019-05-24
CAPITAL NORMAL UNIVERSITY
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Then use adaptive threshold segmentation to extract small tidal creeks

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  • Tidal creek extraction method based on a high-resolution remote sensing image
  • Tidal creek extraction method based on a high-resolution remote sensing image
  • Tidal creek extraction method based on a high-resolution remote sensing image

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[0051] Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention, and to fully convey the scope of the present invention to those skilled in the art.

[0052] It should be noted that certain terms are used in the description and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. The specification and claims do not use differences in nouns as a way to distinguish components, but use differences in functions of components as a criterion for distinction. "Includes" or "comprises" mentioned throughout the spe...

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Abstract

The invention discloses a tidal creek extraction method based on a high-resolution remote sensing image, and the method comprises the following steps: collecting the high-resolution remote sensing image, and eliminating the atmospheric interference of the remote sensing image through radiation calibration and atmospheric correction. The strategy of the method is to extract wide tidal trenches andsmall tidal trenches separately, where the tidal trenches having a width greater than or equal to a predetermined number of pixels are the wide tidal trenches and the tidal trenches having a width less than or equal to the predetermined number of pixels are the small tidal trenches; and the wide tidal creeks are extracted by using a normalized water body index (NDWI) and an OTSU (Out-of-cluster variance) method. the SEaTH algorithm and the J-M (Jeffries-Matusita) distance are adopted to calculate the separability between classes, and the tidal creek and tidal flat are selected for the tidal trench extraction. Aiming at a wave band screened out by an SEaTH algorithm, an improved fuzzy C-means algorithm is utilized to homogenize a heterogeneous background, and then multi-scale Gaussian matching filtering is utilized to enhance a fine tidal creek with a Gaussian shape. And then the small tidal creeks are extracted by using self-adaptive threshold segmentation based on a global mean valueand a standard deviation. And then chippings and plaques are removed in the small tidal creeks. And finally, the small tidal trenches and the wide tidal trenches are combined by adopting trench logicor operation to form a complete tidal trench.

Description

technical field [0001] The invention relates to the technical field of remote sensing, in particular to a tidal creek extraction method based on high-resolution remote sensing images. Background technique [0002] As a typical landform factor on tidal flats, a tidal trench is a tidal channel developed in the intertidal zone (especially the silty muddy intertidal zone) and formed by ocean dynamics (especially tidal action). The gully system itself is an important channel for the continuous exchange of materials, energy and information with the outside world. It plays a vital role in the distribution of tidal water and the supply of sediment. It directly reflects the characteristics of tidal flats. It is an important channel for people to study the hydrological connectivity of coastal areas. one of the important parameters. With the development of development activities such as construction projects and tidal flat breeding, the development of tidal creeks has been greatly aff...

Claims

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Application Information

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IPC IPC(8): G06T7/136G06K9/62
Inventor 宫兆宁王启为周德民张磊汪星井然
Owner CAPITAL NORMAL UNIVERSITY
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