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Non-local wavelet information based remote sensing image change detection method

A remote sensing image and change detection technology, which is applied in the field of image processing, can solve the problems such as the inability to effectively measure the removal of noise and retain image detail information, and the inability to effectively retain image detail information, so as to improve the accuracy and robustness of change detection. Effect

Active Publication Date: 2014-12-10
XIDIAN UNIV
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Problems solved by technology

This method makes full use of the linear characteristics of the image, and uses the gray difference image to make up for the broken line caused by the registration error, which improves the detection accuracy, but there is still a shortcoming that it cannot effectively measure the noise removal. The relationship between the image and the retention of image detail information cannot effectively retain the image detail information

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  • Non-local wavelet information based remote sensing image change detection method
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  • Non-local wavelet information based remote sensing image change detection method

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[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0042] Refer to attached figure 1 , the steps of the present invention are as follows.

[0043] Step 1, read in data.

[0044] Two remote sensing images that have been registered and geometrically corrected were acquired at different times in the same area.

[0045] In the embodiment of the present invention, input the first group of original remote sensing images such as figure 2 as shown, figure 2 (a), figure 2 (b) Two original remote sensing images from the Bern city in the European Remote Sensing Image Database at different times, taken in 1999.04 and 1999.05 respectively, with a size of 256×256 pixels. figure 2 (c) is the reference map for urban change detection in Bern.

[0046] In the embodiment of the present invention, the original remote sensing images of the second group are input as Figure 5 as shown, Figure 5 (a), Figure 5 (b) Two o...

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Abstract

The invention discloses a non-local wavelet information based remote sensing image change detection method. The non-local wavelet information based remote sensing image change detection method mainly solves the problem that the remote sensing image change detection method is low in detection accuracy. Achieving steps of the non-local wavelet information based remote sensing image change detection method comprise (1) reading data; (2) constructing a difference chart; (3) performing wavelet decomposition; (4) denoising a high-frequency portion through a non-local information based method; (5) performing inverse transformation; (6) cutting through a local fuzzy C-mean clustering method. According to the non-local wavelet information based remote sensing image change detection method, the low-frequency information integrity is protected and noise is effectively removed due to the facts that the noise is mainly distributed on a high-frequency detail information portion and accordingly image denoising is performed on a high-frequency detail portion and a self-structure of the image is protected and the image robustness to the noise is improved due to the fact that a single pixel is processed in combination with vectors of neighborhood information.

Description

technical field [0001] The invention belongs to the technical field of image processing, and further relates to a remote sensing image change detection method based on non-local wavelet information. This method can be applied to the dynamic monitoring of lake water level in environmental changes, the dynamic monitoring of crop growth status, military reconnaissance and other fields, and can quickly detect the change information of two-temporal remote sensing images. Background technique [0002] The change detection of remote sensing images refers to detecting the change information of the ground features in the area over time by analyzing two or more remote sensing images from the same area at different times. Change detection in remote sensing images has been widely used in dynamic monitoring of forest resources, monitoring of changes in land cover and use, agricultural resource surveys, urban planning layouts, environmental monitoring and analysis, natural disaster assess...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T5/00
Inventor 马文萍焦李成邢丹公茂果马晶晶李晓婷
Owner XIDIAN UNIV
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