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A Fast Processing Method of Gram-Schmdit Fusion Based on Multispectral Image

A technology of multi-spectral image and processing method, which is applied in the field of fast processing of Gram-Schmdit fusion based on multi-spectral image, can solve problems such as the reduction of fusion processing efficiency, and achieve the effect of improving fusion processing speed, significantly improving efficiency, and reducing the number of

Active Publication Date: 2021-09-07
GEOVIS CO LTD
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Problems solved by technology

However, all intermediate results of the existing Gram-Schmdit fusion method 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 Fast Processing Method of Gram-Schmdit Fusion Based on Multispectral Image
  • A Fast Processing Method of Gram-Schmdit Fusion Based on Multispectral Image
  • A Fast Processing Method of Gram-Schmdit Fusion Based on Multispectral Image

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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 method based on multi-spectral images. The overall steps are: 1. Simplify the Gram-Schmdit transformation formula: 2. Equalize the coefficients of the fusion formula: 3. Gram-Schmdit fusion Fast processing. The present invention adjusts and simplifies the processing process of the Gram-Schmdit fusion method, and performs approximate processing on the statistical parameters therein, which can reduce the quantity of output intermediate results, and reduce the number of visits to IO as much as possible, thereby facilitating the improvement of fusion processing Speed, especially for high-resolution and large-volume data, the efficiency improvement is more significant. Therefore, the present invention can solve the problem of slow processing speed based on the conventional Gram-Schmdit fusion method under common hardware configuration conditions.

Description

technical field [0001] The invention relates to a method, in particular to a Gram-Schmdit fusion fast processing method based on multispectral images. 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 method uses ENVI remote sensing image p...

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Application Information

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