A Spectral Imaging Method Using Shaped Blue Noise Coded Apertures
A coded aperture and spectral imaging technology, applied in the field of photoelectric coding, can solve the problem of not improving the degree of freedom of coding aperture optimization, and achieve the effects of increasing the degree of freedom, improving reconstruction quality, and uniform sampling
Active Publication Date: 2020-07-10
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0060] image 3 It is a comparison of the reconstruction results of hexagonal blue noise coded aperture, square blue noise coded aperture, and square random coded aperture when the number of snapshots is the same and the transmittance is 0.5. The first row is the original spectral image, the second row is the reconstructed image using the hexagonal blue noise encoding aperture, and the third row is the reconstructed image using the square blue noise encoding aperture. The fourth row is the reconstructed image using the square random coding aperture.
[0061] Figure 4 Comparison of the average SNRs of the reconstructed spectral images obtained for several coded apertures, the red dotted star curve is the SNR curve of the reconstruction result of the hexagonal blue noise coded aperture, and the green dotted circle curve is the SNR curve of the reconstruction result of the square blue noise coded aperture, The blue dotted circle curve is the SNR curve of the reconstruction res...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More 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...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28G01J3/02
Inventor 马旭张昊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY