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

Claim 5:
6. A construction system for a visible near-infrared spectrum dictionary, characterized by comprising:
a chromaticity cone construction module, for 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;
an initial visible near-infrared spectrum dictionary construction module, for performing weighted combination on the spectral basis functions and forming an initial visible near-infrared spectrum dictionary;
a multi-scale spectrum curve construction module, for 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
a final visible near-infrared spectrum dictionary generation module, for 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.