Spectral imaging method adopting special-shaped blue noise coding aperture

Abstract

The invention provides a spectral imaging method adopting a special-shaped blue noise coding aperture. The spectral imaging method adopting the special-shaped blue noise coding aperture specifically comprises the following steps: irradiating a target to be imaged with a light source to obtain hyperspectral three-dimensional data, wherein the hyperspectral three-dimensional data are imaged on a hexagonal blue noise coding aperture through a lens and modulated by the coding aperture, and the modulated hyperspectral three-dimensional data are dispersed through a dispersion prism and then imaged on a CCD detector through the lens; and recovering the hyperspectral three-dimensional data of the target to be imaged by utilizing the data detected on the CCD detector. According to the spectral imaging method adopting the special-shaped blue noise coding aperture, in the coding aperture, hexagonal pixels are used for replacing square pixels to form a honeycomb array, because the pixels of the coding aperture are hexagonal, the pixels of a focal plane are rectangular, geometric dislocations exist between the coding aperture and the focal plane, a mathematically equivalent rectangular gray-scale coding aperture is generated by the geometric dislocations, the degree of freedom of modulation is increased, and the reconstruction quality is improved.

Description

technical field [0001] The invention provides a spectral imaging method using a special-shaped blue noise coding aperture, which belongs to the technical field of photoelectric coding. Background technique [0002] Hyperspectral imaging technology images the target object in various bands in the ultraviolet to near-infrared spectral range, and simultaneously obtains the spatial information and spectral information of the object, with high spatial resolution and spectral resolution. Hyperspectral imaging technology has important applications in many fields such as space remote sensing, military reconnaissance, agriculture and industrial production, biomedicine, etc., and has been included in the key project of "Earth Observation and Navigation" by the Ministry of Science and Technology. [0003] With the improvement of spectral resolution, the amount of hyperspectral data increases rapidly, which poses great challenges to hyperspectral image acquisition, storage, transmission...

AI Technical Summary

Problems solved by technology

However, the spatial blue noise proposed by Correa is based on a square coded aperture, which cannot improve the degree of freedom for coded aperture optimization

[0007] In summary, the existing methods for designing coded apertures in CASSI systems need to be further improved and improved

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