A progressive refinement transmission method and system for single-band matrix DEM data

A transmission method and matrix-type technology, which are applied in the field of single-band matrix-type DEM data progressively refined transmission methods and systems, to achieve the effect of increasing the computational burden and having parallelism

Active Publication Date: 2020-07-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But before the data is processed, the data block needs to be decoded. This decoding process is not only time-consuming, but also the space requirement after data decoding is another problem.

Method used

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  • A progressive refinement transmission method and system for single-band matrix DEM data
  • A progressive refinement transmission method and system for single-band matrix DEM data
  • A progressive refinement transmission method and system for single-band matrix DEM data

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Effect test

Embodiment 1

[0054] The progressive refinement transmission method of single-band matrix DEM data comprises the following steps:

[0055] S1. First perform quadtree segmentation on the single-band matrix DEM data to obtain sub-slices;

[0056] S2. Perform singular value decomposition on each sub-slice to obtain the corresponding left singular matrix U, singular value vector S and right singular matrix V;

[0057] S3. Analyze the singular value vectors of each sub-slice to determine the number of effective singular vectors, thereby determining the effective singular vectors of the actual left singular matrix U and right singular matrix V; from the left singular matrix U and right singular matrix V , Singular value vector S, respectively extract effective singular vectors and singular values ​​layer by layer;

[0058] S4. Taking the effective singular vectors and singular values ​​in the extracted left singular matrix U and the effective singular vectors of the right singular matrix V as th...

Embodiment 2

[0062] The progressive refinement transmission method of single-band matrix DEM data comprises the following steps:

[0063] S1. First perform quadtree segmentation on the single-band matrix DEM data to obtain sub-slices;

[0064] S2. Perform singular value decomposition on each sub-slice to obtain the corresponding left singular matrix U, singular value vector S and right singular matrix V;

[0065] S3. Analyze the singular value vectors of each sub-slice to determine the number of effective singular vectors, thereby determining the effective singular vectors of the actual left singular matrix U and right singular matrix V; from the left singular matrix U and right singular matrix V , Singular value vector S, respectively extract effective singular vectors and singular values ​​layer by layer;

[0066] S4. Taking the effective singular vectors and singular values ​​in the extracted left singular matrix U and the effective singular vectors of the right singular matrix V as th...

Embodiment 3

[0070] The progressive refinement transmission method of single-band matrix DEM data comprises the following steps:

[0071] S1. First perform quadtree segmentation on the single-band matrix DEM data to obtain sub-slices;

[0072] S2. Perform singular value decomposition on each sub-slice to obtain the corresponding left singular matrix U, singular value vector S and right singular matrix V; the singular value decomposition assumes that X is a sub-slice;

[0073] The k-th row vector of matrix X is abbreviated as: ; The kth column vector of matrix X is abbreviated as: ; using tokens Indicates the non-zero elements on the main diagonal of the S matrix, and the rest of the elements are all zero, where ;assumed , perform singular value decomposition on the matrix X, and get ;

[0074] Rewrite the result of singular value decomposition and express it in the form of singular vector cumulative sum, namely

[0075]

[0076]

[0077] ;

[0078] Simplifying further...

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Abstract

The invention discloses a single-band matrix type DEM data progressive refined transmission method and system. The method comprises: segmenting DEM data, performing singular value decomposition, analyzing sub-slices, extracting effective singular vectors and singular values layer by layer, then performing compression, performing transmission and storage from a sending end to a receiving end layerby layer, and performing recovery at the receiving end. The system comprises a segmentation module, a decomposition module, an analysis and extraction module, a compression module, a transmission module and a receiving module. According to the method and the system, refined transmission under the control of precision parameters can be realized according to the requirements of actual precision, andthe specific requirements of numerical DEM data in the aspect of precision are met. After the DEM data fragments are compressed, the DEM data fragments do not need to be directly recovered to be in amatrix form at the receiving end and can continuously exist in a vector form, and the compression effect is reserved. When the data is recovered, the used calculation is basic calculation, so that the calculation burden is not increased, and the method has parallelism.

Description

technical field [0001] The invention belongs to the technical field of data transmission, and in particular relates to a progressive refinement transmission method and system for single-band matrix DEM data. Background technique [0002] At present, although the transmission bandwidth in communication technology is developing rapidly, there are still harsh communication environments that cannot make full use of the advantages of transmission bandwidth; in addition, in fields with high real-time requirements, the time consumption of processing large-scale matrix data is a objective problems. At the same time, with the rapid development of hardware technology, the scale of collected data has shown explosive growth. The types of data are different, and the way of compression transmission is also quite different. [0003] With the continuous improvement of the accuracy of sensor equipment and the increase of observation range, the DEM terrain data obtained by earth observation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04N19/96H04N19/85
CPCH04L69/04H04N19/85H04N19/96
Inventor 陈杰田森林李波屠依娜
Owner KUNMING UNIV OF SCI & TECH
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