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Design method of nine-spectral-band multispectral imaging system of single sensor

A multi-spectral imaging and design method technology, applied in the field of fast spectral imaging, can solve problems such as blurring of multi-spectral images, and achieve the effect of ensuring spectral errors

Active Publication Date: 2019-12-17
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The invention provides a design method of a single-sensor nine-band multi-spectral imaging system, which solves the problem that the more the number of spectral segments is, the more blurred the obtained multi-spectral image is under the existing technical conditions

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] The present invention is a design method of a single-sensor nine-band multi-spectral imaging system. The nine-band multi-spectral imaging system is hereinafter referred to as nine-band MSFA, and is specifically implemented according to the following steps:

[0020] Step 1, determine the structure of the nine-band MSFA

[0021] First construct a nine-band MSFA in 4×4 mode, such as Figure 1b As shown, one of the spectral bands occupies 50% of the space and will be used as a guide image to restore other low-sampled spectral bands,

[0022] The spectral sensitivity of the nine-band MSFA is simulated by using a Gaussian function in the visible spectrum, and it can be adjusted to other spectral ranges for specific applications. The sampling spectrum λ is set between 400nm and 700nm, and the filter sensitivity function is:

[0023]

[0...

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Abstract

The invention discloses a design method of a nine-spectral-band multispectral imaging system of a single sensor. The method comprises the following steps: step one, constructing a nine-spectral-band MSFA in a 4*4 mode in which one spectral band occupies 50% of space and is used as a guide image to recover other low-sampling-rate spectral bands; step two, in the nine-spectrum MSFA, using a fifth spectral band as an oversampling spectral band similar to a G spectral band of RGB imaging, enabling the B5 spectral band to occupy the 50% of imaging space and reserving detailed information, carryingout interpolation on the B5 spectral band, and using the processed B5 spectral band as a guide image to carry out interpolation on other spectral bands based on a guide filter; and step three, reconstructing other spectral bands by using the guide filter and interpolation. According to the method provided by the invention, the spectral error minimization is ensured, and a high-quality image can beobtained.

Description

technical field [0001] The invention belongs to the technical field of fast spectral imaging, and relates to a design method of a single-sensor nine-band multi-spectral imaging system. Background technique [0002] Hyperspectral imaging (HSI system) collects and processes information from the electromagnetic spectrum. The goal of hyperspectral imaging is to obtain the spectrum of each pixel in the scene image, which can be used to find objects, identify materials or detect processes. However, HSI systems are usually expensive and time-consuming during high-density sampling, and the data volume of HSI images is much larger than that of ordinary color images. An alternative to spectral imaging is multispectral imaging (MSI), in which a limited number of spectral measurements are made by several predetermined narrowband filters. Despite losing some spectral density, MSI significantly reduces hardware complexity and achieves reasonable spectral accuracy. In the past decade, a ...

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Application Information

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IPC IPC(8): G01J3/28
CPCG01J3/2823G01J2003/2826
Inventor 孙帮勇袁年曾余喆赵哲陈富伟
Owner XIAN UNIV OF TECH
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