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A Post-processing Method of Panchromatic Sharpening Based on Enhanced Back Projection

A technology of enhancement processing and back-projection, applied in image enhancement, image data processing, instruments, etc., can solve the problems of combined use of blanks, useless post-processing, etc., to improve image spatial quality, reduce spectral distortion, and improve spatial resolution. Effect

Active Publication Date: 2021-01-19
XI AN JIAOTONG UNIV
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Problems solved by technology

[0014] Although histogram matching HM, high-pass modulation HPM and MTF-matched filter are very effective in improving the results of pan-sharpening, they are only used as pre-processing or intermediate steps of the algorithm and not used for post-processing
In addition, these three technologies are usually only one of them used in the panchromatic sharpening method, and their combined use is a blank so far.

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  • A Post-processing Method of Panchromatic Sharpening Based on Enhanced Back Projection
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  • A Post-processing Method of Panchromatic Sharpening Based on Enhanced Back Projection

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Embodiment

[0062] Dataset selection:

[0063] Please refer to Table 1, four satellite data sets of IKONOS, QuickBird, WorldView-2 and GeoEye-1 are selected as experimental data in the embodiment.

[0064] The panchromatic image resolution of the IKONOS dataset is 1 meter, and the resolution of the multispectral image is 4 meters. The multispectral image consists of four bands: blue band, green band, red band, and near-infrared 1 band, and mainly contains large objects. , such as mountains, farms, roads, and houses after an earthquake; the panchromatic image resolution of the QuickBird dataset is 0.7 meters, and the resolution of the multispectral image is 2.8 meters. The multispectral image consists of blue band, green band, red band, near The infrared band consists of four bands, mainly including huge buildings, such as skyscrapers, commercial and industrial buildings, and many small objects, such as cars, playgrounds, etc.; the panchromatic image resolution of the WorldView-2 dataset i...

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Abstract

The invention discloses a panchromatic sharpening post-processing method based on enhanced back projection. The panchromatic sharpening post-processing method comprises the following steps: performingenhancement processing on a fusion result obtained by panchromatic sharpening processing; Adjusting spectral information of a fusion result through a histogram matching technology; improving The spatial resolution of a fusion result through a high-pass modulation technology; Carrying out reconstruction error back projection on the fusion result after the enhancement processing: calculating a reconstruction error under low resolution based on an imaging model; Performing back projection on the reconstruction error to a fusion result to adjust the spatial resolution and the spectral information; And finally outputting a result of the back projection stage, namely a post-processing result, until the reconstruction error is small enough. The method can be applied to post-processing of panchromatic sharpening, and the spatial resolution of a fusion result can be greatly improved while spectral information of a spectral image is kept.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image processing, image fusion and panchromatic sharpening, and in particular relates to a panchromatic sharpening post-processing method based on enhanced back projection. Background technique [0002] The panchromatic sharpening of remote sensing images is to restore the multispectral images with both high spatial and high spectral resolution on the basis of known multispectral images with low spatial resolution and panchromatic images with high spatial resolution and low spectral resolution. Spectral images, and then improve the fine expression ability of multispectral images for ground objects. The research on panchromatic sharpening stems from the fact that the current high-resolution satellites are limited by technology. For the same scene, only one high-spatial-resolution panchromatic image (Panchromatic image) and low-spatial-resolution multiplex images with multiple bands can be pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T5/40
Inventor 刘军民马静陈怡君张讲社杜玉倩费蓉蓉李会荣
Owner XI AN JIAOTONG UNIV
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