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Image super-resolution and image quality enhancement method

A super-resolution and image technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of few optimization elements, inability to effectively improve image quality, limited space for image quality improvement, etc.

Inactive Publication Date: 2013-09-18
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to solve the problems existing in the existing Wiener filter image restoration method that can be used for few optimization elements, and the image quality improvement space is limited so that the image quality cannot be effectively improved, the present invention provides an image super-resolution and image quality enhancement method

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Embodiment Construction

[0054] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0055] A method for image super-resolution and image quality enhancement of the present invention is achieved through the following steps:

[0056] 1. Use a specially designed optical imaging system to collect a pair of in-focus and out-of-focus images and N misplaced in-focus images

[0057] 1. Build a specially designed optical imaging system

[0058] like figure 1 As shown, the optical imaging system includes: an extended target 1, a telescopic objective lens 2, a beam splitter 3, a first CCD4, a second CCD5, a precision piezoelectric actuated linear guide 6 and a main control computer 7, and the extended target 1 sends The ray of light enters the telescopic objective lens 2 through the disturbance wave surface 8, and then exits the telescopic objective lens 2 to the beam splitter 3, and is divided into two beams after passing through the beam splitter 3...

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Abstract

The invention provides an image super-resolution and image quality enhancement method and relates to the technical field of digital image processing in a space remote sensing imaging system. The image super-resolution and image quality enhancement method solves the problems that optimization elements which can be utilized are less, the improvement space of the image quality is limited, and accordingly the image quality cannot be effectively improved in the existing Wiener filtering image restoration method. The image super-resolution and image quality enhancement method comprises utilizing a light beam splitter to collect in-focus images and out-of-focus images in two channels respectively and collect N staggered in-focus images which enable 1 / N pixels to be staggered in the horizontal and vertical direction relative to the in-focus images; performing PD (Phase Diversity) processing on the in-focus images and the out-of-focus images; utilizing a conjugate gradient algorithm to obtain an aberration coefficient; obtaining restored target images after the PD processing and calculating an objective function; performing Wiener filtering processing on the staggered in-focus images and the restored target images; and performing sub-pixel integration on the two restored images to obtain a restored image with ultrahigh resolution. The image super-resolution and image quality enhancement method achieves super-resolution and high definition of images and improves the resolution by 1.4 times.

Description

technical field [0001] The invention relates to the technical field of digital image processing in a space remote sensing imaging system, in particular to an image super-resolution and image quality enhancement method. Background technique [0002] With the development of space remote sensing technology, higher requirements are placed on the spatial resolution of the remote sensing imaging system. Although the pixel size of the detector has become smaller and the area of ​​the image array has become larger and larger in recent years, it still cannot meet the practical application requirements. requirements. [0003] At present, in the research field of image quality enhancement methods for satellite optical remote sensing imaging payload systems, traditional methods and a single technical model are still used. In fact, due to the limitation of the detector pixel size, the existing image quality enhancement methods, such as dimension Nano-filter image restoration method, by ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/10
Inventor 王刚王磊许博谦
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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