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Image-scaling method and device thereof

An image scaling and source image technology, applied in the image field, can solve problems such as flickering of zoomed images

Inactive Publication Date: 2010-07-21
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The inventor found during the invention process that at least the following problems exist in the prior art. Since the bicubic algorithm method includes cubic operations, flickering will appear in the processed zoomed image

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Embodiment Construction

[0012] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0013] A method for image zooming in an embodiment of the present invention is as follows: figure 1 shown, including:

[0014] S101: Obtain edge information corresponding to pixels of the target image corresponding to pixels of the source image;

[0015] S102: Calculate pixel values ​​of pixel points of the target image according to the edge information.

[0016] In the embodiment of the present invention, image scaling is realized according to the size of the edge information. In this way, for a strong edge texture, that is, a pixel with a large edge message, the zoom range is larger, and the corresponding position of the position with a strong edge intensity of the image can be kept clear and stable after scaling. For textures with weak edge strength, that is, pixels ...

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Abstract

The invention provides an image-scaling method which comprises the steps of: acquiring edge information of a pixel point of target image corresponding to a pixel point of source image; and according to the edge information, calculating the pixel value of the pixel point of the target image. The invention also discloses an image-scaling device which comprises an edge information acquisition unit used for acquiring the edge information of the pixel point of the target image corresponding to the pixel point of the source image, and a pixel value calculating unit used for calculating the pixel value of the pixel point of the target image according to the edge information. The invention can lead the position corresponding to image edge with high strength to be maintained to be clear and stable after the image is scaled, and ensures the position corresponding to image edge with low strength to be maintained to be soft after the image is scaled, thus avoiding the problem of image flicker.

Description

technical field [0001] The present invention relates to the image field, in particular to an image scaling method and device. Background technique [0002] During video playback, users want to change the image size arbitrarily according to their needs, so image scaling has become more and more important. At present, the typical scaling algorithm of image scaling is the bicubic algorithm, which calculates the target position of each pixel in the source image by traversing each pixel of the target image, and calculates the target pixel of the image according to the pixel values ​​around the position value. [0003] During the invention process, the inventor found that at least the following problems exist in the prior art. Since the bicubic algorithm method includes cubic operations, flickering phenomenon will appear in the processed zoomed image. Contents of the invention [0004] In order to solve the above-mentioned problem of flickering of zoomed images, an embodiment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/373G06T3/40
Inventor 邱香膏谢清鹏周建同朱雄羽
Owner HUAWEI TECH CO LTD
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