Method and system for enhancing digital image resolution

A resolution enhancement, digital image technology, applied in the field of image processing, can solve the problems of image edge loss, image blurring, etc., to achieve the effect of speeding up the execution and reducing the huge amount of calculation

Active Publication Date: 2010-02-03
HANVON CORP
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and system for digital image resolution enhancement, so as to solve the problems of image blurring after interpolation and loss of image edge parts in image interpolation methods under current technical conditions

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  • Method and system for enhancing digital image resolution
  • Method and system for enhancing digital image resolution

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[0041] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] The present invention is described in detail below to the improvement of Bayesian image interpolation model:

[0043] First, the existing Huber-Markov image model is introduced. The Huber-Markov image model is a model used by the Bayesian image interpolation model to measure the pixel smoothness of the interpolated image. To make the interpolated image have good smoothness, it is necessary to adjust the index in the Huber-Markov model Kernel optimization solver.

[0044] The Huber-Markov image model is described as follows:

[0045] Let the resolution of the low-resolution image be N 1 ×N 2 , arrange it row by row into N 1 N 2 dimensional column vector, denoted y. Then the resolution of the high-resolution image is q...

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Abstract

The invention discloses a method and a system for enhancing digital image resolution to solve the problems that the further processing and the analysis of the image are influenced due to the low resolution of the prior video image. The method comprises the following steps: image interpolation, namely carrying out nearest-neighbor interpolation for a brightness map of a low-resolution image, and improving a Bayesian image interpolation model; and interpolation correction, namely correcting a brightness map of a high-resolution image by using the improved Bayesian image interpolation model. Aiming at a color image, the method provides image pre-processing and post-processing, wherein the image pre-processing carries out color space conversion for the low-resolution color image, and the imagepost-processing reversely converts the corrected high-resolution brightness map and a chrominance component map into the color images. Aiming at the problems that the prior Bayesian interpolation method has large calculated amount and low execution speed, the execution of interpolation is accelerated by quickly determining the falling direction and step length; meanwhile, the method and the system have edge keeping capacity, and can effectively recover image details and improve the solution of the images.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method and system for enhancing the resolution of digital images. Background technique [0002] In the field of image processing, image interpolation is an important research direction. In the research directions of image resolution enhancement, image correction, image rotation and demosaicing, image interpolation is an essential stage. The image is composed of pixels. When the image is enlarged, reduced or rotated, the original pixels will be rearranged to generate some new pixels. Image interpolation is to determine the unknown pixels in the middle of these known pixels. Through image interpolation, geometric transformation can be reduced Destruction of the original image. [0003] Existing image interpolation methods are mainly divided into two categories: adaptive methods and non-adaptive methods. The adaptive interpolation method only considers the correlation of adjacent...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40G06T5/00
Inventor 黄磊禹晶刘昌平
Owner HANVON CORP
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