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A Gram-Schmdit fusion fast processing algorithm

A processing algorithm and fast technology, applied in the field of algorithms, can solve the problems of reduced fusion processing efficiency, achieve the effect of increasing fusion processing speed, significantly improving efficiency, and reducing the number of visits

Active Publication Date: 2018-12-21
GEOVIS CO LTD
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Problems solved by technology

However, all intermediate results of the existing Gram-Schmdit fusion algorithm process need to be saved as temporary files to reduce the memory usage of ordinary machines, and read again as the input of subsequent processes, especially the processed images are high-resolution For high-resolution, large-volume panchromatic or multi-band multi-spectral data, a large number of IO read and write processes will seriously reduce the efficiency of fusion processing

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  • A Gram-Schmdit fusion fast processing algorithm

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Embodiment Construction

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] In the current Gram-Schmdit fusion, it is necessary to use the Gram-Schmdit transformation formula (that is, formula 1) to integrate all the multispectral band data except the first band after resampling (the multispectral band data is usually divided into 4 band) into the corresponding orthogonal component, and then obtain the component of the first band of GS (referred to as the first component of GS) through the analog panchromatic method, and output it into multiple temporary files. Then replace the first component of GS by generating corrected panchromatic data (that is, the corrected simulated panchromatic image data), read the data in the temporary file, and use the Gram-Schmdit inverse transformation formula (that is, formula 2) to convert each GS component Inverse transform to fused multispectral band data.

[0046] ...

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Abstract

The invention discloses a Gram-Schmdit fusion fast processing algorithm, its overall steps are: First, simplify the Gram-Schmdit Transform Formula: 2. Reduce and Equalize the Coefficients of Fusion Formula: 3. Gram-Schmdit fusion fast processing. The invention adjusts and simplifies Gram-Schmdit fusion algorithm, and reduce the statistical parameters of the process, can reduce the number of outputintermediate results, and as far as possible to reduce the number of accesses to IO, which is conducive to improve the fusion speed, especially for high resolution, large data volume of data, efficiency improvement is more significant. Therefore, the invention can solve the problem that under the condition of common hardware configuration, based on the conventional Gram-Schmdit fusion algorithm deals with the problem of slow speed.

Description

technical field [0001] The invention relates to an algorithm, in particular to a Gram-Schmdit fusion fast processing algorithm. Background technique [0002] For remote sensing images of optical systems, there has always been an inevitable contradiction between their spatial resolution and spectral resolution. Multispectral and high spatial resolution images can be produced by fusing lower spatial resolution multispectral images with higher spatial resolution panchromatic images. Therefore, various fusion methods based on different algorithms have been developed rapidly and widely used. With the development of remote sensing technology, due to the need for image interpretation and inversion of target parameters, some simple fusion methods can no longer meet the urgent needs of spectral information preservation and spatial texture information increase. [0003] The Gram-Schmdit (Schmidt Orthogonalization) fusion algorithm uses ENVI remote sensing image processing software a...

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Application Information

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IPC IPC(8): G06T5/50
CPCG06T5/50G06T2207/10032
Inventor 吴方才周馨白晓辉李艳艳
Owner GEOVIS CO LTD