Hyperspectral unmixing optical implementation method based on spectral imaging technology

Abstract

The invention relates to a hyperspectral unmixing optical implementation method based on spectral imaging technology. The hyperspectral unmixing optical implementation method based on the spectral imaging technology solves the problems that a data cube needs to be reconstructed for existing hyperspectral unmixing, and the data cube comprises the massive amount of data information, so that a data transmission system, a storage system and a processing system have large burden and low spectral unmixing efficiency. The method comprises the following steps that (1) light of a spatial pixel is projected onto a wide-spectrum coding filter by an optical splitting system; (2) an end-member matrix E is formed, a generalized inverse matrix E<#> of the end-member matrix E is obtained, i is set to be equal to 0, and the number of end members is m; (3) i plus 1, if i is less than or equal to m, the step (4) is performed, otherwise, the step (8) is performed; (4) encoding control is performed on a DMD; (5) spectral modulation is performed on a spectrum after optical splitting through the DMD; (6) the modulated spectrum is projected onto a detector; (7) the detector obtains an abundance coefficient of the preceding spatial pixel for the end members, and the step (3) is performed; and (8) after spectral unmixing of a current line is completed, the spectral unmixing process is performed on a next line.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to an optical realization method of hyperspectral unmixing based on spectral imaging technology, that is, a method for directly performing spectral unmixing based on a spectral imager. Background technique [0002] Due to the large instantaneous field of view, compared with traditional panchromatic and multispectral imaging, the phenomenon of mixed pixels is more serious in hyperspectral images. However, the ubiquitous mixed pixels in hyperspectral remote sensing data make it difficult for traditional pixel-level remote sensing classification and area measurement accuracy to meet the required requirements. Therefore, it is necessary to perform spectral unmixing on the acquired hyperspectral data, so that the application of hyperspectral remote sensing can reach the sub-pixel level from the pixel level. [0003] The traditional hyperspectral unmixing takes the 3D data cube output a...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that existing hyperspectral unmixing needs to reconstruct the data cube, which contains a huge amount of data information, which makes the burden on the data transmission system, storage system and processing system large, and the efficiency of spectral unmixing is low. It provides A Hyperspectral Demixing Optical Implementation Method Based on Spectral Imaging

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