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Hyperspectral imaging system for preset level raising orthogonal square wave frequency coding

A technology of hyperspectral imaging and orthogonal square wave, which is applied in the fields of spectral diagnosis, medical science, sensors, etc. It can solve the problems of low signal-to-noise ratio of digital signals and affect the overall signal-to-noise ratio of images, and achieve high-precision measurement and improve Signal-to-noise ratio, application-friendly effects

Inactive Publication Date: 2017-03-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, when a pure orthogonal square wave is used as the excitation signal, the signal-to-noise ratio of the digital signal obtained in the low-level part of the orthogonal square wave is very low, thus affecting the overall signal-to-noise ratio of the image

Method used

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  • Hyperspectral imaging system for preset level raising orthogonal square wave frequency coding
  • Hyperspectral imaging system for preset level raising orthogonal square wave frequency coding
  • Hyperspectral imaging system for preset level raising orthogonal square wave frequency coding

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Embodiment 1

[0026] A hyperspectral imaging system with quadrature square wave frequency encoding with elevated preset levels, see figure 1 and figure 2 , The imaging system includes: a group of n monochromatic light sources 1 (indicated by LD, the wavelength of the monochromatic light source is between 600-1200nm, this wavelength band is an "optical window", and the penetration depth is relatively deep) and a camera 4 .

[0027] Wherein, the specific value of n is related to the sensitivity of the breast tissue sample 3 to different wavelengths, which is not limited in the embodiment of the present invention); a group of monochromatic light sources 1 are distributed on one side of the breast tissue sample 3, and a camera 4 Distributed on the other side of breast tissue sample 3.

[0028] Wherein, each monochromatic light source LD in a group of monochromatic light sources 1 1 …LD n Arranged in a linear manner, the lens 2 is used to converge a beam of light to form a linear light sourc...

Embodiment 2

[0056] A hyperspectral imaging system with quadrature square wave frequency encoding with elevated preset levels, see figure 1 and figure 2 , this embodiment uses a laser diode as a monochromatic light source LD 1 …LD n Take this as an example.

[0057] Each laser diode LD in a group of monochromatic light sources 1 is respectively driven by orthogonal square waves with different frequencies and raised preset levels i , each pixel in a camera 4 receives each laser diode LD i Monochromatic Light Combination I Through Breast Tissue Sample 3 ij ; Combination of monochromatic light I by computer ij Separation can obtain monochromatic light combination I ij Each laser diode LD in the i Based on the contribution of the breast tissue sample 3, transmission hyperspectral imaging can be performed.

[0058] The computer processing steps in this embodiment are the same as those in Embodiment 1, and will not be repeated here in this embodiment.

[0059] In the embodiments of the...

Embodiment 3

[0062] A hyperspectral imaging system with quadrature square wave frequency encoding with elevated preset levels, see figure 1 and figure 2 , this embodiment uses a monochromatic diode as a monochromatic light source LD 1 …LD n Take this as an example.

[0063] Each monochromatic diode LD in a group of monochromatic light sources 1 is respectively driven by orthogonal square waves with different frequencies and raised preset levels i , each pixel in a camera 4 receives each monochromatic diode LD i Monochromatic Light Combination I Through Breast Tissue Sample 3 ij ; Combination of monochromatic light I by computer ij Separation can obtain monochromatic light combination I ij Each monochrome diode LD in the i Based on the contribution of the breast tissue sample 3, transmission hyperspectral imaging can be performed.

[0064] The computer processing steps in this embodiment are the same as those in Embodiment 1, and will not be repeated here in this embodiment.

[00...

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Abstract

The invention discloses a hyperspectral imaging system for preset level raising orthogonal square wave frequency coding. Preset level raising orthogonal square waves different in frequency are used for driving all monochromatic sources in a monochromatic source set, and all pixel points in images received by a camera are monochromatic light combinations of all the monochromatic sources penetrating through a mammary tissue sample; in the process of collecting the images through the camera, noise level does not change, as the preset level of orthogonal square wave signals serving as a drive is raised, the orthogonal square wave signals are improved obviously compared with noise on the low-level part of the orthogonal square wave signals, the low-level section of the orthogonal square wave signals is improved, the camera obtains the signal to noise ratio of the images, and then the precision of the monochromatic light combinations input into a computer is improved; the computer separates the monochromatic light combinations to obtain contributions of all the monochromatic sources in the monochromatic light combinations, and transmission hyperspectral imaging for the mammary tissue sample is achieved on the basis.

Description

technical field [0001] The present invention relates to the field of imaging systems, in particular to a hyperspectral imaging system with an orthogonal square wave frequency code that raises a preset level, and the hyperspectral imaging system is applied to the detection of breast sample tissue. Background technique [0002] In the prior art, imaging the interior of objects, especially the interior of the human body, has the outstanding advantages of being non-destructive, non-invasive, and non-radiative through light, but so far there is no mammary gland transmission imaging optical measurement system that can be used at home for frequent tumors The reason for the self-examination is that the existing breast imaging system has high cost, complex operation, and limited precision, which cannot meet the needs of breast self-examination in practical applications. [0003] In order to improve image measurement quality, the patent application in the prior art with the announceme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00
CPCA61B5/0075A61B5/0082
Inventor 李刚刘爱林凌
Owner TIANJIN UNIV