Multi-spectral light field imaging system and method based on the principle of chromatic aberration expansion
A technology of multispectral imaging and light field imaging, applied in spectrometry/spectrophotometry/monochromator, spectrum investigation, optical radiation measurement, etc., can solve the problems of multispectral and light field information difficulties, and achieve high computational efficiency , efficient reconstruction, easy-to-achieve effects
Active Publication Date: 2019-01-25
NANJING UNIV
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, simultaneous acquisition of multispectral and light field information is difficult because these methods require measuring too much anisotropic data
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
[0044] Taking a three-channel (L1-450nm, L2-550nm, L3-650nm) pre-filter array 1 and an optical path expansion unit 3 composed of N-BK7 regular glass crystal as an example, the present invention will be further described in detail.
[0045] The pre-filter array 1 is composed of three coplanar filters of different wavelength bands, which are L1-450nm, L2-550nm, and L3-650nm respectively, and have the same size; the imaging main lens group 2 includes With multiple lenses, light from the same depth in the scene is focused on the image plane at the same depth, and other types of aberrations are also well calibrated. The regular glass crystal (made of N-BK7 material) in front of the image plane is It is the optical path expansion unit 3, and the glass crystal is a regular cuboid.
[0046] The imaging process of the multi-spectral light field imaging system in this embodiment is as follows: the incident light of object points of different depths (d1, d2, d3, and the depths are increa...
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 multi-spectral optical field imaging system and a multi-spectral optical field imaging method based on color difference expansion principle. The multi-spectral optical field imaging system comprises a prepositive filter array, an imaging main lens group, an optical path expansion unit, a multi-spectral imaging unit, and an image calculation processing unit. The prepositive filter array is used to introduce information of various spectral range of a scene, The imaging main lens group comprises a plurality of lens units, and is used to correct the aberration of the imaging system. The optical path expansion unit is formed by regular high refractive index glass crystals, and is used to expand the color difference of the imaging system. The multi-spectral imaging unit is used to shoot spectral images passing through the lens group. The image calculation processing unit is used to calculate spectral image data, and is used to realize acquisition of multi-spectral optical field information by a local linear mapping algorithm. The multi-spectral optical field information of the scene can be acquired at the same time, and the system has advantages of simple structure and high-efficiency calculation.
Description
technical field [0001] The invention relates to the technical field of multispectral light field imaging, in particular to a multispectral light field imaging system and method based on the principle of chromatic aberration expansion. Background technique [0002] In order to perceive and understand complex scenes, researchers try to obtain more information of the scene, such as multispectral and light fields. Traditional cameras take pictures using planar sensors based on Bayer filter arrays. The captured three-primary-color image is a planar projection of a three-dimensional scene represented by three color channels, ie, red, green, and blue. Along with the development of optics and computational photography, multispectral and light field information acquisition has been extensively explored to capture more spectral channels and light field information in a scene. [0003] In the past few decades, several different spectral imaging methods have been proposed to capture m...
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): G01J3/28
CPCG01J3/2823G01J2003/2826
Inventor 岳涛李昀谦黄谦陈林森索津莉马展曹汛
Owner NANJING UNIV