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Super-resolution imaging method based on spherical aberration aliasing observation

An imaging method and super-resolution technology, applied in the field of image processing, can solve the problems of high cost of hardware circuits and high performance requirements of analog devices, and achieve the effects of fast image reconstruction, high image accuracy, and simple system structure.

Inactive Publication Date: 2011-09-14
XIDIAN UNIV
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Problems solved by technology

The volume of the design structure is relatively small, the optical system is relatively simple, but the cost of the hardware circuit is relatively expensive, and the performance requirements of the analog device are very high

Method used

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  • Super-resolution imaging method based on spherical aberration aliasing observation
  • Super-resolution imaging method based on spherical aberration aliasing observation
  • Super-resolution imaging method based on spherical aberration aliasing observation

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Embodiment Construction

[0036] refer to figure 1 , the imaging steps of the present invention are as follows:

[0037] Step 1. Make an optical lens or lens group with obvious spherical aberration effect, so that the point spread function of the optical system has a spatial distribution range and radial randomness close to the size of the low-resolution CCD array, and ensure that the optical system is within the effective imaging range linear shift-invariant properties. For example, a single spherical lens with a pupil diameter-to-focal length ratio greater than 1 / 10, or a lens group obtained by placing several spherical lenses coaxially in sequence, the lens spacing of the lens group and the curvature design of each lens can be obtained through professional simulation software.

[0038] Parallel light can be precisely focused on one point after passing through a parabolic lens, but not precisely focused on one point after passing through a spherical lens. Traditional cameras use thin spherical mir...

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Abstract

The invention discloses a super-resolution imaging method based on spherical aberration aliasing observation, which mainly aims to solve the problems of low imaging accuracy, structural complexity and high computational complexity of the conventional method. The method comprises the following steps of: (1) establishing an optical system with remarkable spherical aberration effects; (2) obtaining a point spread function of the optical system by utilizing a theoretical deviation or simulation or experimental measurement method, and constructing a sampling matrix according to the point spread function; (3) performing aliasing observation on target optical signals by utilizing the established optical system, and performing sampling by using a low-resolution sensor array to obtain a low-resolution aliased image; and (4) reconstructing the low-resolution aliased image by using a rapid iterative optimization algorithm according to a compressive sensing theory in combination with the samplingmatrix to obtain a high-resolution image. The method has the advantages of simple system structure, small volume, low manufacturing cost, high image reconstruction accuracy and high reconstruction speed, and can be used for the acquisition and high-resolution reconstruction of the image in a small-scale sampling array.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a super-resolution image imaging method under a low-sampling array, which is mainly applied to image acquisition and high-resolution reconstruction under a small-scale sampling array. Background technique [0002] With the informatization process of modern society, higher and higher requirements are put forward for the effective acquisition, compression, encoding and transmission of massive information. Acquisition of super-resolution images is one of the most widely concerned issues. Usually people's idea to solve this problem is to increase the hardware scale and density of the signal processing system from the perspective of process manufacturing and system design. For example, Switzerland's Seitz Phototechnik AG company has manufactured a super high-resolution camera with a resolution of up to 160 million in 2010. However, to achieve high resolution, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N7/26G06T5/50H04N19/132
Inventor 石光明王琦彭冬
Owner XIDIAN UNIV
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