Image amplification method

An image and image block technology, applied in the field of image enlargement based on structure preservation, can solve the problems of low computational complexity, high computational complexity, and inability to reconstruct

Active Publication Date: 2016-11-30
PEKING UNIV
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Problems solved by technology

[0007] Algorithms in the prior art are based on interpolation methods, although the amount of calculation is low, the reconstruction effect is poor
Based on the reconstruction method,

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It should be understood that the specific The examples are only used to explain the present invention, not to limit the present invention. The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] Such as figure 1 As shown in the flow chart of the present invention, a kind of image enlargement method of the present invention comprises: Gradient value estimation step S1, wherein the gradient of high-resolution image is estim...

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Abstract

The present invention discloses an image amplification method. The method comprises: a gradient value estimation step, wherein the gradient of a high-definition image is estimated through adoption of a non-local average filtering method; a gradient guidance interpolation step, wherein the interpolation of an edge pixel is guided through adoption of the gradient value; an interpolation result correction step, wherein the interpolation image is subjected to postprocessing through adoption of the non-local average filtering method used in the gradient estimation stage to remove the noise and the artificial effect induced by the interpolation; and a texture structure reconstruction step, wherein the interpolation image is taken as an initial result, the gradient is taken as a constraint and a final high-definition image is obtained through adoption of the reconstruction method.

Description

technical field [0001] The invention relates to the technical field of video image processing, in particular to an image enlargement method based on structure preservation. Background technique [0002] With the popularization of digital products, images, as the main source of information for human beings, have been more and more widely used. At the same time, digital image processing technology has also been developed rapidly. The acquisition of video images is a key step in the digital image processing system. During the digital acquisition process, the image resolution and image quality will decrease due to the following factors. Sampling frequency, undersampling causes the spectrum of the image to alias and degrade due to distortion effects. Atmospheric disturbances, defocusing, sensor size, and relative motion between the image capture device and the object being photographed can cause image blur. In the process of image acquisition, transmission and storage, noise,...

Claims

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Application Information

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IPC IPC(8): G06T3/40
CPCG06T3/4007
Inventor 贾惠柱杨帆解晓东杨长水陈瑞
Owner PEKING UNIV
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