A building shadow extraction processing method for a sentinel 2A image

A technology of shadow extraction and processing methods, applied in the fields of instruments, character and pattern recognition, computer parts, etc., can solve the problems of no good effect and inappropriate sentinel 2A10m resolution images, etc., to enhance differences, enhance building shadows, The effect of improving the extraction accuracy

Pending Publication Date: 2019-05-28
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF4 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above building shadow extraction indexes are set for images with higher spatial resolution such as Quickbird and IKONOS, and are not suitable for the 10m resolution image of Sentinel 2A
In addition, the Sentinel 2A image has 13 bands, and the existing spectral index does not make use of its rich spectral information, so the extraction of the Sentinel 2A building shadow does not have a good effect

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
  • A building shadow extraction processing method for a sentinel 2A image
  • A building shadow extraction processing method for a sentinel 2A image
  • A building shadow extraction processing method for a sentinel 2A image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention Inside.

[0039] The invention provides a building shadow extraction index for Sentinel 2A images, extracts three feature components according to the spectral characteristics of the main urban features, and then designs and constructs a combined shadow index CSI according to the characteristics of the three feature components of the ground features, which improves the building quality. Object shado...

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 discloses a building shadow extraction processing method for a sentinel 2A image, and the method comprises the steps of S1, extracting the main ground feature component of an urban area,designing a shadow enhancement index based on a sentinel 2A original spectrum to enhance a building shadow; calculating a normalized difference water body index to enhance the water body; extractingan original spectral band Band 8 of the sentinel 2A to enhance other dark reflectivity ground objects; S2, based on the three extracted characteristic components, constructing a combined shadow indexto highlight a building shadow; and selecting an optimal threshold value by using an OTSU method to obtain a final urban building shadow distribution map. By the adoption of the technical scheme, thedifference between the shadow and other ground objects can be remarkably increased, the phenomenon that urban building shadow, water and dark reflectivity ground objects are mixed is effectively avoided, and the extraction precision of the urban building shadow is improved.

Description

technical field [0001] The present invention relates to the technical field of building shadow extraction, in particular to a building shadow extraction processing method for Sentinel 2A images. Background technique [0002] Shadow is a widely distributed feature in remote sensing images that cannot be ignored. In high-resolution images, urban building shadows are usually caused by tall buildings blocking light sources. The spectral information of the shadow area is greatly weakened, and its existence has caused great obstacles to the subsequent urban land use classification and change detection. Therefore, when using high-resolution remote sensing images to study urban problems, shadow detection is a step that must be considered in the image preprocessing process. [0003] At present, when using high-resolution remote sensing images for shadow detection, there are two commonly used methods, namely, the method based on the model and the method based on the nature of the sh...

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): G06K9/00G06K9/32G06K9/34G06K9/62
Inventor 黄惠程吉付航张旭鸣孙根云张爱竹
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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