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A method for eliminating astigmatism of grating object imaging based on sequential image analysis

A sequential image and grating pair technology, which is applied in image analysis, image enhancement, image data processing, etc., can solve the problems of astigmatism in achromatic imaging and affect the imaging quality, so as to eliminate astigmatism and improve the imaging quality of objects Effect

Active Publication Date: 2021-02-05
GUANGXI UNIV
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Problems solved by technology

This imaging system can be used for aiming, positioning and measuring the target object across obstacles, and for making new filter systems, etc., but its achromatic imaging is often accompanied by astigmatism, which seriously affects the imaging quality

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  • A method for eliminating astigmatism of grating object imaging based on sequential image analysis
  • A method for eliminating astigmatism of grating object imaging based on sequential image analysis
  • A method for eliminating astigmatism of grating object imaging based on sequential image analysis

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Embodiment Construction

[0062] The present invention is described in detail below in conjunction with accompanying drawing:

[0063] Such as figure 1 As shown, a method for eliminating grating-to-object imaging astigmatism based on sequence image analysis includes the following steps:

[0064] (1) The CCD camera collects the sequence images on the diffraction light path formed by the light source passing through the dispersion grating at different grating spatial frequencies;

[0065] (2) Convert each frame of the collected sequence image into a grayscale image and perform normalization processing, and then perform adaptive median filtering to improve image quality, smooth noise, and protect image edge information, and then sharpen the image Edge function extraction;

[0066] (3) Based on the fitting model of the Boltzmann function, the horizontal and vertical edge spread function ESF of each frame is obtained, and the edge spread function ESF is differentially processed to obtain the line spread f...

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Abstract

The invention discloses a method for eliminating astigmatism in grating-to-object imaging based on sequence image analysis, which includes the following steps: collecting sequence images of grating-to-object imaging under different imaging conditions, and using the edge method to perform edge grayscale information on the collected images. Extraction and median filtering, based on the Boltzmann function fitting model, the point spread function PSF corresponding to the edge image is obtained, the point spread function is used for deconvolution restoration, and the restored sequence image is evaluated.

Description

technical field [0001] The invention relates to a method for processing the astigmatism of grating-to-object imaging, in particular to a method for eliminating the astigmatism of grating-to-object imaging based on sequential image analysis. Background technique [0002] Grating is an important and widely used optical element. It not only has the well-known dispersion and light splitting functions, but also has imaging functions. There are different types of grating imaging. Among them, the Talbot effect and Lau effect that reflect the self-imaging phenomenon of gratings discovered in the early years have been widely studied and applied, and another kind of imaging that is different from them - the study of double gratings on the dispersion imaging of objects Work is still in its infancy. This imaging makes the grating an imaging device for general objects like lenses and mirrors. Compared with traditional lens imaging, it has the advantage of lightness and lightness, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00G06T5/00G06T5/10G06T7/00G06T7/13G06T7/44
CPCG02B27/0012G06T5/10G06T7/0002G06T7/13G06T7/44G06T2207/30168G06T2207/20032G06T2207/10004G06T5/00
Inventor 卢泉张卫平张泽昊石瑞宇
Owner GUANGXI UNIV
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