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Method for quickly detecting and replacing edge fragments of image slice

A detection method and slicing technology, which can be applied in image enhancement, image analysis, image data processing, etc., can solve the problems of large amount of computation, and achieve the effect of reducing the amount of computation, reducing the burden of computation, and reducing the cost

Active Publication Date: 2021-11-26
PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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Problems solved by technology

However, this detection method is too computationally intensive

Method used

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  • Method for quickly detecting and replacing edge fragments of image slice
  • Method for quickly detecting and replacing edge fragments of image slice
  • Method for quickly detecting and replacing edge fragments of image slice

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] By observing the shape of the fragments, it can be concluded that the no-data area basically appears as a whole on the edge of the slice. If horizontal and vertical lines are used to scan the slice one by one, there is always one of the four outer edges. The proportion is the largest among all scan lines. Generally, there will not be a whole image of a particularly opposite sex. If it does appear, it should be cropped and then sliced ​​to avoid small probability events.

[0032] Therefore, the present invention proposes a fast detection method for edge fragments of an image slice, which uses horizontal and vertical lines to scan the four outer edges of the slice one by one, and only detects the pixel strips on the four outermost boundaries of the slice. If the proportion of no-data pixels in a certain pixel strip is greater th...

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Abstract

The invention discloses a method for quickly detecting and replacing edge fragments of an image slice. The method comprises the following steps: S1, requesting image slice data of a plurality of grids in a screen range; S2, sorting the mSultiple stages of image slices in each grid according to a time sequence; S3, for each grid, taking a slice at the latest time, and judging whether the slice in each grid is a fragment; S4, if the slice in a certain grid is judged to be a complete slice, returning to the slice to fill the corresponding grid; and S5, if the slice in a certain grid is judged to be a fragment, marking and removing the slice, and repeating the step S3 on the next slice at the latest time in the same grid until the complete slice is returned. According to the method, which stage of image slice data is used in a certain grid is quickly determined with extremely low operation cost, fragment replacement is achieved, meanwhile, the operation burden of a server can be relieved, and the response speed is increased.

Description

technical field [0001] The invention relates to the technical field of remote sensing image processing, and more particularly to a method for quickly detecting and replacing edge fragments of image slices. Background technique [0002] Remote sensing technology takes the earth as a complete system, studies the spatial structure and interaction of its various circles, conducts qualitative and quantitative analysis of remote sensing data, and solves problems in the earth's resources and environment. Remote sensing technology has the advantages of macroscopic, rapid and repeated observation, and is widely used in environmental protection and resource investigation of land, water conservancy, forestry and agriculture. [0003] When loading remote sensing image tiles on the screen as the map basemap, it is necessary to splice tiles of a specific level to fill the screen. Each slice is produced by a certain period of imagery according to a common slice scheme. In most cases, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/11G06T7/12G06T7/13
CPCG06T7/11G06T7/13G06T7/12G06T2207/10032
Inventor 曾麦脉罗成刘亚飞顾祝军王晓刚陈谢宁何秋银
Owner PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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