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Image interpolation method and device

An interpolation method and interpolation technology, which are applied in the field of image processing, can solve the problems of affecting the image interpolation effect and the deviation of the displacement coefficient from the actual situation, and achieve the effect of accurate equivalent displacement coefficient and improved effect.

Inactive Publication Date: 2015-11-25
PEKING UNIV +2
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Problems solved by technology

[0005] The present invention provides an image interpolation method and device to solve the problem in the prior art that for low-resolution images with segmental gray steady-state characteristics, the calculated displacement coefficients of isoluminous lines will deviate from the actual situation. Thus affecting the effect of image interpolation

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Embodiment Construction

[0022] The technical solution of the present invention will be described in further detail below through specific embodiments and accompanying drawings.

[0023] figure 1 A schematic flowchart of an embodiment of the image interpolation method provided by the present invention. like figure 1 As shown, the method may specifically include:

[0024] S101, for each original pixel in the candidate image to be interpolated, calculate and obtain the isoluminance line corresponding to the original pixel according to the gray value of the original pixel and the gray values ​​of other original pixels in the adjacent area of ​​the original pixel The equivalent displacement coefficient of .

[0025] Specifically, in this step, first calculate the displacement coefficient of the corresponding isoluminance line according to the gray value of the original pixel, and then adjust the displacement coefficient according to the gray value of other original pixels in the adjacent area, so as to...

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Abstract

The invention provides an image interpolation method and device. The method includes: as for each original point in a candidate image for interpolation, calculating an equivalent displacement coefficient of an isoluxline corresponding to the original pixel point according to the gray values of the original pixel point and the gray values of other original pixel points in areas adjacent to the original pixel points; constructing an isoluxline interpolation gridding according to the equivalent displacement coefficient; inserting interpolation pixel points into the isoluxline interpolation gridding according to a predetermined interpolation method until an interpolation result candidate image corresponding to the interpolation candidate image is obtained. According to the invention, the accuracy of the determined equivalent displacement coefficient of the isoluxline can be improved and therefore the image interpolation effect is improved further.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image interpolation method and device. Background technique [0002] Image interpolation, as an image enhancement technique, obtains a high-resolution image by interpolating estimated high-resolution pixels between the original low-resolution image pixels. [0003] The existing image interpolation method refers to: calculate the displacement coefficient of the isoluminance line corresponding to each pixel point according to the gradient information of the gray value of each pixel point in the low-resolution image, and construct the isoluminance line according to the displacement coefficient Interpolation pixels are inserted into the interpolation grid to obtain high-resolution images. [0004] However, the existing image interpolation methods are only suitable for the interpolation of low-resolution images with consistent gray-scale statistical steady-state c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40
Inventor 杨文瀚刘家瑛李马丁郭宗明
Owner PEKING UNIV
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