Shenzhen Hypernano Optics Technology Co., Ltd.

Xingchao Yu

Bin Guo

Jinbiao Huang

Zhe Ren

Min Liu

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.

Growing community of inventors

Shenzhen, China

Xingchao Yu