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Parallel mosaic method and system for massive remote sensing images based on Spark

A remote sensing image and image mosaic technology, applied in the field of remote sensing image processing, can solve the problems of complex calculation process, low node utilization rate, complex process, etc., and achieve the effect of solving data read and write operations and improving the efficiency of parallel processing.

Inactive Publication Date: 2017-12-15
NORTHEAST FORESTRY UNIVERSITY
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Problems solved by technology

However, due to the low degree of automation or the complexity of the calculation process, the traditional serial method is difficult to parallelize, and cannot meet the large-scale remote sensing image mosaic requirements with large data volume, complex process, and huge time-consuming algorithm processing.
However, in the existing parallel mosaic algorithm for remote sensing images, the processing flow is basically the same as that of the serial algorithm, except that the data are processed in parallel in the stages of image registration and image fusion, which are prone to low node utilization and frequent Data I / O and other issues

Method used

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  • Parallel mosaic method and system for massive remote sensing images based on Spark
  • Parallel mosaic method and system for massive remote sensing images based on Spark
  • Parallel mosaic method and system for massive remote sensing images based on Spark

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[0046] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the present invention will be further detailed below in conjunction with the accompanying drawings illustrate.

[0047] In order to solve the above-mentioned existing problems, the present invention discloses a method and system for parallel mosaicing of massive remote sensing images based on Spark. By customizing RDD, the operation operator of self-defining RDD is invoked in the Spark distributed memory computing framework to realize image mosaicing parallel processing.

[0048] The present invention is realized by following method, a kind of parallel mosaic method of massive remote sensing image based on Spark, such as figure 1 shown, including:

[0049] S101: The client submits a r...

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Abstract

The invention provides a parallel mosaic method and system for massive remote sensing images based on Spark, which distributes the remote sensing image mosaic task to each worker node through the Master node in the Spark cluster as a controller of the entire Spark cluster. Through calling a custom RDD operation operator, the image mosaic is completed. The method rewrites RDD's compute and getPartitions methods in Spark to customize the RDD for remote sensing image processing, and takes three key steps of image mosaic, overlap area estimation, image registration and image fusion as the operation of custom RDD Sub-image parallel implementation of the mosaic. The mosaic method and system for massive remote sensing images based on Spark is able to effectively increase the image mosaic efficiency of a large number of images while the image mosaic effect is ensured.

Description

technical field [0001] The invention relates to the field of remote sensing image processing, in particular to a method and system for parallel mosaicing of massive remote sensing images based on Spark. Background technique [0002] With the continuous development of earth observation technology, the analysis of massive remote sensing images has become the focus of research in military, meteorological, transportation and other fields in recent years. However, due to the low degree of automation or the complexity of the calculation process, the traditional serial method is difficult to parallelize, and cannot meet the large-scale remote sensing image mosaic needs with large data volume, complex process, and huge time-consuming algorithm processing. However, in the existing parallel mosaic algorithm for remote sensing images, the processing flow is basically the same as that of the serial algorithm, except that the data are processed in parallel in the stages of image registra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40G06T7/30
CPCG06T3/4038G06T7/30G06T2207/10032G06T2207/20221
Inventor 景维鹏霍帅起陈广胜
Owner NORTHEAST FORESTRY UNIVERSITY
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