A sub-pixel super-resolution imaging system and method based on translationally adjustable wavefront coding

An imaging system and coding technology, applied in the field of optics, can solve problems such as the mismatch between the point spread function and the equivalent sampling interval, and the aliasing effect of the original resolution image, so as to reduce the aliasing effect, reduce aliasing, and achieve bandwidth. Effect

Active Publication Date: 2019-02-19
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI +1
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Problems solved by technology

[0006] First of all, in the existing sub-pixel imaging technology, the original resolution image used still has aliasing effect;
[0007] Se...

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  • A sub-pixel super-resolution imaging system and method based on translationally adjustable wavefront coding
  • A sub-pixel super-resolution imaging system and method based on translationally adjustable wavefront coding
  • A sub-pixel super-resolution imaging system and method based on translationally adjustable wavefront coding

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Embodiment Construction

[0063] The present invention proposes a new type of sub-pixel super-resolution reconstruction system based on translation-adjustable wavefront coding, aiming to utilize the good low aliasing of wavefront coding data and the reconfigurable characteristics of the point spread function for restoration and the translation-adjustable generation The flexibility of sub-pixel displacement is used to achieve higher quality super-resolution reconstruction.

[0064] Basic structure and principle

[0065] refer to figure 1 , the system includes an imaging lens 2 , a composite phase mask 3 , an image detector 4 and an image processing unit 5 sequentially arranged along the transmission direction of the optical axis. After the target 1 passes through the imaging lens 2 and the compound phase mask assembly 3, a blurred intermediate coding sequence image is formed on the image detector 4, and then the image processing unit 5 first maps the intermediate coding sequence image in the coding dom...

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Abstract

The invention relates to a sub-pixel super-resolution imaging system and method based on translational adjustable wavefront coding. The system comprises an imaging lens, a composite phase mask, an image detector and an image processing unit arranged in sequence along an optical axis transmission direction. A composite phase mask is formed by superposing two identical phase components along the optical axis, and the two identical phase components can be translated independently in the x-direction and y-direction. Where x and y belong to [-1, 1] represent normalized aperture coordinate; Two identical phase components are two classical cubic phase components or two generalized cubic phase components. The invention not only reduces the aliasing of the original image data for sub-pixel super-resolution reconstruction, At that same time, the point spread function (PSF) require for the restoration of the original image can be effectively matched with the equivalent sample interval of the high-resolution mesh, and the high-quality super-resolution restoration image quality can be obtain while the super-depth-of-field effect of the wavefront coding is taken into account.

Description

technical field [0001] The invention belongs to the field of optical technology, and in particular relates to a sub-pixel super-resolution imaging system and method based on translational adjustable wavefront coding. Background technique [0002] Sub-pixel dislocation sampling imaging technology is an effective means to improve the resolution without changing the physical size of the detector pixel, and has been widely used in aerospace, aviation, scientific research and commercial fields. [0003] The sub-pixel dislocation sampling imaging technology was proposed by the French National Space Technology Research Center and applied to the SPOT-5 satellite camera for the first time. Encapsulate two linear array CCDs with a half-pixel displacement in the track-crossing direction in the same chip, acquire two images with a half-pixel displacement from each other at the same time and perform fusion processing to achieve super-resolution imaging. According to reports, this proces...

Claims

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Application Information

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IPC IPC(8): G06T1/00G06T5/00
CPCG06T1/0007G06T5/001
Inventor 赵惠魏静萱夏晶晶张凌李创樊学武
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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