Patent ID: 11935268
Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A construction method for a visible near-infrared spectrum dictionary, characterized by comprising the following steps:
S1: constructing a four-primary color chromaticity cone by using normalized spectral response curves of four primary colors of a visible light camera as spectral basis functions, wherein the four primary colors comprise: blue, green, red, and near-infrared, and each point in the four-primary color chromaticity cone is acquired by computing a weighted sum of the spectral basis functions;
S2: performing weighted combination on the spectral basis functions and forming an initial visible near-infrared spectrum dictionary;
S3: acquiring points on the four-primary color chromaticity cone on the basis of the initial visible near-infrared spectrum dictionary according to different spectral resolutions and performing discretization, constructing multi-scale spectrum curves of the visible light camera, and forming words in the initial visible near-infrared spectrum dictionary, wherein the words in the spectrum dictionary represent discretized points of the chromaticity cone, and a scale size is a change in the spectral resolution; and
S4: clustering chromaticity coordinates corresponding to the words into different groups, performing weighted combination on multi-scale spectral response curves corresponding to different group types, generating phrases or sentences in the dictionary, adding the same to the initial visible near-infrared spectrum dictionary, and generating a final visible near-infrared spectrum dictionary;
wherein a phrase in the spectrum dictionary corresponds to a spatial linear segment in the chromaticity cone or a spatial curved segment in the chromaticity cone.