Remote sensing image time sequence change detection method and system

A technology of time series and change detection, which is applied in the direction of instruments, character and pattern recognition, computer components, etc., and can solve problems such as misjudgment, ineffective use of spatial information, and poor detection of time series changes

Active Publication Date: 2018-09-21
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] However, the mutation detection of the above two methods is carried out in the trend component after removing the seasonal influence, and the cloud and snow pixels remaining in the trend component will be misjudged as the mutation pixel
Moreover, the above two analysis methods only consider the temporal changes

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  • Remote sensing image time sequence change detection method and system
  • Remote sensing image time sequence change detection method and system
  • Remote sensing image time sequence change detection method and system

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] figure 1 It is a flow chart of a method for detecting changes in time series of remote sensing images provided by an embodiment of the present invention, as shown in figure 1 As shown, the method includes:

[0027] S1. Declouding the time series image to be tested, and obtaining the cloud-free time series curve of each pixel in each band of the cloud-free time ...

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Abstract

An embodiment of the invention provides a remote sensing image time sequence change detection method. The method comprises the steps of performing cloud removal on a to-be-detected time sequence imageto obtain a cloudless time sequence curve of each pixel of a cloudless time sequence image at each waveband; obtaining a seasonal breakpoint position in each cloudless time sequence curve; and basedon a preset screening algorithm, detecting whether the change of each seasonal breakpoint position is true change or false change. According to the remote sensing image time sequence change detectionmethod and system provided by embodiments of the invention, by utilizing spatial information of seasonal earth surface change, the position of each seasonal breakpoint in a time sequence is accuratelydetermined, and whether the change of each seasonal breakpoint position is the true change or the false change is judged, so that effective detection of the time sequence is realized.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of remote sensing image processing, and in particular to a method and system for detecting changes in time series of remote sensing images. Background technique [0002] Earth observation satellites can provide large-scale surface remote sensing images for a long time, and have great potential in time series change detection. Time series change detection is to use a series of images to qualitatively analyze the time effect of a phenomenon and quantify its transformation. Currently, change detection technology based on medium time and spatial resolution is used in the detection of agricultural land changes, agricultural conditions and forest conditions. , Urban sprawl and other aspects have made great progress. [0003] At present, there are various methods for time series change detection, which can be divided into two types according to their basic processing units: the first type is ...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V20/44G06V20/49G06V20/40
Inventor 张立福张霞王楠林昱坤岑奕孙雪剑
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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