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Method and device for deblurring images based on single low resolution

A low-resolution, deblurring technology used in the field of image processing to solve problems such as image blurring

Inactive Publication Date: 2013-02-06
HISENSE VISUAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Interpolation methods widely used in practice include nearest neighbor interpolation method, bilinear interpolation method and bicubic interpolation method, among which bicubic interpolation method has the best magnification effect, but these interpolation methods will cause image blur

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  • Method and device for deblurring images based on single low resolution
  • Method and device for deblurring images based on single low resolution
  • Method and device for deblurring images based on single low resolution

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Embodiment Construction

[0059] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0060] The core idea of ​​the present invention is: first convert the input RGB image into the LAB format, retain as wide a color gamut and rich colors as possible; Perform bilateral filtering on the interpolated image to remove noise and sharpen the edge, use the Laplace operator to calculate the gradient value of the filtered image to obtain edge information, and modify the gradient value according to the weight obtained by the gradient difference of the neighborhood to enhance the outline of the object in the image and Reduce the noise in the smooth area, superimpose the corrected gradient image and the interpolation image to obtain a sharpening result; finally convert bac...

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Abstract

The invention provides a method and a device for deblurring an image based on single low resolution, relating to the technical field of image processing. The method for deblurring the image based on single low resolution comprises the following steps of: filtering an image to be processed to obtain a filter image; convoluting the filtered image by means of a Laplace operator to obtain a gradient image; correcting the gradient image based on the gradient difference value of a neighbourhood; and overlapping the image to be processed with the corrected gradient image to obtain a sharpened image.By adopting the method and the device for deblurring the image based on single low resolution of the invention, the noise of a smooth region in the gradient image is reduced and the profile and detail losses of an object are lessened during the sharpening process of the single low-resolution image, so that the visual effect of the image is greatly improved.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a single low-resolution image deblurring method and device. Background technique [0002] High-resolution images have a wide range of uses in real life. For example, in the field of digital TV, if digital TV (DTV) signals can be converted into high-definition TV (HDTV) signals, the visual experience of viewers can be improved; in the field of security inspection, although cameras are generally installed, the obtained images are very blurred , The high-resolution image can not only assist the usual security management, but also help the police to handle the case when a case occurs. [0003] In recent years, various methods for improving image resolution and image quality have emerged, which can be divided into two categories: one is based on multiple low-resolution images, and the image is firstly corrected by estimating the rotation angle and offset distance, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 田翠翠
Owner HISENSE VISUAL TECH CO LTD
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