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Method for realizing flexible central fovea imaging based on rotary biprism imaging system

An imaging system and double prism technology, applied in prisms, details involving image stitching, image enhancement, etc., can solve the problems of small adjustment range of the fovea area, failure to fully utilize the deflection ability of the rotating double prism, and complex system structure. Achieve compact structure, increase application value, and simple optical structure

Active Publication Date: 2021-12-07
FUZHOU UNIV
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Problems solved by technology

However, neither of the above two methods can make full use of the deflection capability of the field of view of the rotating biprism, resulting in a complex system structure and a small adjustment range in the fovea area.

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  • Method for realizing flexible central fovea imaging based on rotary biprism imaging system
  • Method for realizing flexible central fovea imaging based on rotary biprism imaging system
  • Method for realizing flexible central fovea imaging based on rotary biprism imaging system

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Embodiment

[0082] A method for realizing flexible fovea imaging based on a rotating double prism imaging system according to the present invention, wherein the rotating double prism imaging system is composed of a pair of identical wedge prisms and an imaging detector, such as figure 1 shown. When the two prisms are installed, the coaxiality and spacing are ensured through the housing, and they can rotate independently around the central axis of the system under the drive of the motor. For convenience, the position of the two prisms is described by the rotation angle, and the rotation angle of the two prisms is defined as the counterclockwise angle between the main section and the positive direction of the x-axis, respectively (θ 1 , θ 2 )express.

[0083] In this embodiment, the two prisms have larger vertex angles and the imaging detector itself has a larger field of view angle. The parameters for setting the rotating double prism imaging system are as follows: the vertex angle α of...

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Abstract

The invention relates to a method for realizing flexible central fovea imaging based on a rotary biprism imaging system. The method comprises the steps of S1, constructing a rotary biprism imaging system; S2, constructing a fitness function, and defining a definition and calculation method of a fitness value; S3, determining a region of interest and the number of sub-images, and solving a prism rotation angle by using a particle swarm optimization algorithm; S4, sequentially adjusting the rotation angles of the prisms according to the result of the particle swarm optimization algorithm, and collecting images; S5, carrying out distortion correction on the collected images; S6, splicing the distorted and corrected images to obtain a large field of view; and S7, performing super-resolution reconstruction on the region of interest to further improve the resolution of the central fovea region. According to the invention, central fovea imaging with flexible adjustment of the region of interest can be realized, and acquisition of an overall large field of view is considered. Besides, central fovea imaging can be realized only by using the single rotary biprism imaging system, so that the complexity of equipment is greatly reduced, and the method has excellent practical value.

Description

technical field [0001] The invention relates to the technical field of imaging systems and image processing, in particular to a method for realizing flexible fovea imaging based on a rotating double prism imaging system. Background technique [0002] Foveal imaging, also known as human-like retinal imaging, is characterized by a large overall field of view and high resolution only in a certain region of interest. Foveal imaging not only satisfies large field of view search and local target monitoring, but also greatly reduces the amount of data and data processing complexity, and improves the efficiency of data processing and transmission. With the development of science and technology, more and more artificial fovea imaging systems have been used in security monitoring, remote sensing mapping, military investigation and other fields. [0003] At present, people have designed a variety of artificial fovea imaging systems based on special optical structures, multi-aperture a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/10G02B5/04G06T3/40G06T5/00G06T7/33
CPCG02B26/108G02B5/04G06T3/4053G06T3/4038G06T7/33G06T2200/32G06T5/80
Inventor 黄峰王鹏飞吴衔誉沈英任和
Owner FUZHOU UNIV
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