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Rural settlement unit information extracting technology based on knowledge discovery QUICKBIRD images

A technology of settlements and images, which is applied in the field of information extraction of rural settlement units, can solve problems such as the difficulty of information extraction of settlement space units

Inactive Publication Date: 2014-01-08
SICHUAN NORMAL UNIV
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AI Technical Summary

Problems solved by technology

On high-resolution remote sensing images, settlements appear as complex and diverse aggregates, which makes it difficult to extract the spatial unit information of settlements

Method used

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  • Rural settlement unit information extracting technology based on knowledge discovery QUICKBIRD images

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Embodiment Construction

[0014] 1. Using a polynomial geometric correction model, the 1:10,000 topographic map is used to perform geographical correction on the QUICKBIRD panchromatic band and multispectral images, and the nearest neighbor method is used to determine the brightness value of the pixel.

[0015] 2. Use linear stretching to enhance the image.

[0016] 3. Calculate NDVI using the near-infrared and red bands of the QUICKBIRD image. If B2(i, j)>T and NDVI(i, j)

[0017] 4. Adopt If B4(i, j)

[0018] 5. Adopt If B1(i, j)

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Abstract

The invention provides a rural settlement unit information extracting technology based on knowledge discovery QUICKBIRD images, belonging to the technical field of remote sensing thematic information extracting, and aiming at solving the technical problem that: on the remote sensing images with high resolution, the settlement is a complex and various aggregate so that automatic and semi-automatic extracting settlement space unit information has large technical difficulty. The technology is mainly characterized in that: spectrum knowledge of each component of the rural settlement on the QUICKBIRD images is found, and the knowledge is used to initially extract the component information of the rural settlement; and the rural settlement unit information is semi-automatically extracted by using knowledge such as size, space relationship and the like of each component. The area precision of the settlement unit extracted by the technical method achieves to 97.4%, and the space position precision achieves to 90.4%. The method is suitable for semi-automatically extracting the rural settlement unit information from the QUICKBIRD images in plain regions, especially Chengdu plain regions.

Description

1. Technical field [0001] The invention relates to knowledge discovery-based remote sensing image information extraction technology, in particular to knowledge discovery-based remote sensing image (QUICKBIRD) rural settlement unit information extraction. 2. Background technology [0002] The methods of settlement extraction mainly include visual interpretation and extraction 【1】 , classification extraction 【2-4】 , Extraction based on knowledge discovery. Some scholars have successfully developed a knowledge discovery-based model for proposing urban and rural settlement information from images such as LANDSAT TM / ETM and CBERS 【5-7】 , analyze the residential area and its background spectral characteristics to establish a settlement extraction model. High-resolution images such as QUICKBIRD and IKONOS provide advanced technologies for settlement extraction, but these are mainly used for the extraction of urban settlement information, and few people use them for the extractio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T5/00
Inventor 杨存建王琴牟琳卢洲
Owner SICHUAN NORMAL UNIV
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