Shenzhen Hypernano Optics Technology Co., Ltd.

Jinbiao Huang

Bin Guo

Zhe Ren

Xingchao Yu

Min Liu

Pingping Yu

Mingliang Zhen

A method for extracting spectral information of a substance under test includes: identifying a pixel region A(x, y) occupied by an object under test from a hyperspectral image acquired; extracting a specular reflection region Aand a diffuse reflection region Afrom the pixel region A(x, y), and calculating a representative spectrum I(ω) of the specular reflection region Aand a representative spectrum I(ω) of the diffuse reflection region A, respectively; by comparing each element in the representative spectrum I(ω) of the specular reflection region Awith each element in the representative spectrum I(ω) of the diffuse reflection region A, separating information of a light source from spectral information of the object to obtain a first spectral invariant C(ω). This method does not require additional spectral information of the light source, which improves the analysis efficiency.

Method for extracting spectral information of a substance under test

A method and device for restoring and reconstructing a light source spectrum based on a hyperspectral image are provided. A hyperspectral image is processed to obtain a first maximum spectrum. The first maximum spectrum is matched with a light source spectral basis vector set in a light source spectrum dictionary, and a linear decomposition is performed to obtain a dictionary set. The maximum value of each waveband is obtained and iterative approximation is performed. Therefore, it can quickly restore the spectrum of the light source of the shooting environment from a single hyperspectral image using a relatively simple calculation process, and can still achieve a good restoration effect for monochromatic image scenes or image scenes with few colors, even close to the real light source spectrum. After the light source spectrum is obtained, this information can be further utilized for different kinds of applications.

Method and device for restoring and reconstructing a spectrum of a light source based on a hyperspectral image

A system for testing a spectral response speed of a tunable filter is disclosed, which includes a collimating light source, a beam splitting element, a focusing lens, and an image recording device of light spot position arranged successively. The tunable filter is disposed between the collimating light source and the beam splitting element and configured to be continuously tuned within a certain wavelength range during testing. The beam splitting element is used to form light beams of different wavelength bands passing through the tunable filter into diffracted beams or refracted beams corresponding to different wavelength bands. The focusing lens is used to perform focusing. The image recording device of light spot position is used to record change information about positions where the diffracted beams or refracted beams corresponding to different wavelength bands are imaged.

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Shenzhen, China

Jinbiao Huang