Method and device for identifying black and smelly water

A black and odorous water body and water body technology, applied in the direction of measuring devices, material analysis through optical means, scattering characteristic measurement, etc., can solve difficult atmospheric correction, increase the difficulty of black and odorous water body identification, remote sensing technology does not have good atmospheric correction Methods and other issues

Active Publication Date: 2018-07-27
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
View PDF5 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the commonly used atmospheric correction reflectance R rs To identify the black and odorous degree of water body, however, the atmospheric correction reflectance R rs Accurate atmospheric correction is required to achieve accurate atmospheric correction, and accurate atmospheric correction requires measured ae

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for identifying black and smelly water
  • Method and device for identifying black and smelly water
  • Method and device for identifying black and smelly water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0075] In this embodiment, obtaining the Rayleigh scattering reflectance of each pixel of the water body in the blue band, the Rayleigh scattering reflectance of the green band, and the Rayleigh scattering reflectance of the red band may include multiple methods. In the example, the following two implementation modes are provided, specifically including:

Embodiment approach 1

[0076] Embodiment 1: If Rayleigh scattering reflectance correction is performed on each pixel in the panchromatic image and multispectral image when preprocessing the high spatial resolution remote sensing image, the preprocessing In the Rayleigh scattering reflectance of each pixel in the preset band of the high spatial resolution remote sensing image, the Rayleigh scattering reflectance of each pixel in the blue light band and the Rayleigh scattering of the green light band of each pixel of the water body are obtained. Reflectance and Rayleigh scattering reflectance in the red band.

[0077] Wherein, extracting each pixel of the water body from the preprocessed high spatial resolution remote sensing image is equivalent to determining the position of each pixel of the water body in the preprocessed high spatial resolution remote sensing image. Thus, according to the position of each pixel of the water body, the Rayleigh scattering reflectance of each pixel of the water body c...

Embodiment approach 2

[0078] Embodiment 2: Rayleigh scattering rate correction is performed on each pixel of the water body in the preprocessed high-spatial-resolution image, so as to obtain the Rayleigh scattering reflection of each pixel of the water body in the blue band Ratio, Rayleigh scattering reflectance in the green band and Rayleigh scattering reflectance in the red band.

[0079] For the second embodiment, the Rayleigh scattering reflectance is only corrected for each pixel of the extracted water body, and then the Rayleigh scattering reflectance of each pixel of the water body in the preset band is obtained, thereby obtaining the water body The Rayleigh scattering reflectance of each pixel in the blue band, the Rayleigh scattering reflectance of the green band, and the Rayleigh scattering reflectance of the red band.

[0080] S104: According to the Rayleigh scattering reflectance of the blue light band, the Rayleigh scattering reflectance of the green light band, the Rayleigh scattering...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method and a device for identifying black and smelly water. The method comprise the following steps: preprocessing an initial high-spatial-resolution remote sensing image to obtain a preprocessed high-spatial-resolution remote sensing image; extracting each pixel of the water from the preprocessed high-spatial-resolution remote sensing image, and obtaining Rayleigh scattering reflectivity of blue light band, Rayleigh scattering reflectivity of green light band and Rayleigh scattering reflectivity of red light band of each pixel of the water; calculating BOI index valueof each pixel according to the Rayleigh scattering reflectivity of blue light band, the Rayleigh scattering reflectivity of green light band, the Rayleigh scattering reflectivity of red light band and a preset BOI index model; comparing the BOI index values with a preset threshold value to determine the black odor level of each pixel in the water. Thus, the black and smelly water is identified with a remote sensing technology on the basis of the Rayleigh scattering reflectivity of different bands and the BOI indexes without accurate atmospheric correction.

Description

technical field [0001] The invention relates to the field of identification of black and odorous water bodies, in particular to an identification method and device for black and odorous water bodies. Background technique [0002] Urban black and odorous water body refers to the general term for unpleasant colors and / or unpleasant odors in urban construction areas. Urban black and odorous water bodies are generally dark black, dark gray, dark brown, yellowish brown and gray green, etc. . Urban black and odorous water not only seriously damages the ecosystem of urban water system, but also seriously affects the health and quality of life of residents. [0003] At present, with the development of remote sensing technology, remote sensing monitoring has realized low-cost and high-efficiency monitoring of rivers, and my country's remote sensing monitoring technology has reached the sub-meter level, and it also has monitoring capabilities for relatively small rivers. Therefore, R...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N21/47
CPCG01N21/4738G01N2021/4769
Inventor 申茜姚月李俊生曹红业张兵
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap