Method for correcting accurate position of light spot array of snapshot imaging spectrometer

An imaging spectrometer and a calibration method technology, applied in the field of spectrometers, can solve the problems of not extracting bright spots, reducing the spectral calibration accuracy of snapshot-type video imaging spectrometers, etc.

Active Publication Date: 2021-07-06
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

[0002] The extraction of bright spots on the background target surface in the prior art is mainly realized by setting a global threshold, resulting in some areas of the target surface st

Method used

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  • Method for correcting accurate position of light spot array of snapshot imaging spectrometer
  • Method for correcting accurate position of light spot array of snapshot imaging spectrometer
  • Method for correcting accurate position of light spot array of snapshot imaging spectrometer

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Embodiment approach

[0046] In a preferred embodiment, the lattice is formed by mercury lamp spots.

[0047]In a preferred embodiment, the punctuation coordinate law of the lattice is as follows: the point coordinates of the first row and the first column are (x 1 ,y 1 ), the coordinates of the point in the first row and column m are (x m ,y 1 ), the coordinates of the point in the first column of the nth row are (x 1 ,y n ).

[0048] In a preferred embodiment, the horizontal step size of each sub-region is The vertical step size of each sub-region is

[0049] The specific operation of this method: first divide the sub-regions, then update the threshold for each sub-region, perform T′(i, j) calculation, then confirm the position of the bright spots in the sub-regions, and finally, judge the validity of the bright spots.

[0050] Divide into sub-regions: Divide the entire target surface into m×n rectangular sub-areas for the step size, and use the gray histogram algorithm to calculate t...

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Abstract

The invention discloses a method for correcting the accurate position of a light spot array of a snapshot imaging spectrometer, and the method comprises the steps: selecting a light spot dot matrix in a full target surface, then dividing rectangular sub-regions, obtaining a threshold value of each sub-region through a histogram algorithm, and then representing the optimal threshold value of the central region according to the initial threshold value and the weight coefficient of the adjacent sub-regions of one sub-region, then determining the bright spot position of the sub-region, and finally judging whether the bright spot is an effective point or not. According to the method, effective point extraction and invalid point elimination are realized, and interference of invalid bright points on spectrum calibration is avoided.

Description

technical field [0001] The invention belongs to the technical field of spectrometers, in particular to a method for correcting the precise position of a spot array of a snapshot imaging spectrometer. Background technique [0002] The extraction of bright spots on the background target surface in the prior art is mainly realized by setting a global threshold, resulting in some areas of the target surface still having some bright spots not extracted or extracting invalid bright spots, thus seriously reducing the snapshot video imaging. Spectrometer spectral calibration accuracy. Contents of the invention [0003] In order to solve the above problems, the present invention provides a method for correcting the precise position of a spot array of a snapshot imaging spectrometer, which includes the following steps: [0004] S1: Select m×n lattices in the whole target surface; [0005] S2: Divide the above target surface into m×n rectangular sub-areas, and calculate the horizon...

Claims

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Application Information

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IPC IPC(8): G01N21/27
CPCG01N21/274
Inventor 杨晋王明佳冯树龙陈佳奇孙慈宋楠赵梓彤于昌本王添一
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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