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Image zooming method and device thereof

An image scaling and scaling technology, applied in the field of image processing, can solve problems such as image quality degradation and image border jaggedness, and achieve the effect of ensuring image quality

Active Publication Date: 2011-11-16
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will also lead to a reduction in image quality, and some undesirable effects such as jagged edges will occur

Method used

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  • Image zooming method and device thereof
  • Image zooming method and device thereof

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Embodiment Construction

[0018] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0020] The first embodiment of the present invention relates to an image scaling method. In this embodiment, N×M order filter image scaling is realized with N line-buffers, wherein the scaling ratio of the image is I / D, and M is The maximum value of I and D.

[0021] Specifically, assuming that N=4, the order of the filter for scaling is 4M. Sin...

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Abstract

The invention relates to an image processing technique, and discloses image zooming method and device thereof. In the invention, when the number of filter coefficients required by one point in the zoomed image is greater than N, if one row cache finishes the zooming computation on one point in the image and outputs the data of the zoomed point, the row cache empties the cached data, restarts the zooming processing on the next point to be zoomed in the image, and outputs the data after zooming, wherein N is the number of the row caches. The invention realizes the image zooming of the N*M orderfilter by circularly using the row caches, thereby ensuring the quality of the zoomed image.

Description

technical field [0001] The invention relates to image processing technology, in particular to static image or video image scaling technology. Background technique [0002] Image scaling technology is one of the common technologies in image processing. Through image scaling technology, the same source image can be used to generate target images with different resolutions, so that a picture image can be presented on terminal devices with different resolutions. About image scaling Technology can refer to the US Patent No. 6,825,857. [0003] At present, image scaling is widely used in video or static image processing. The scaling algorithm used more is to use filters in the horizontal and vertical directions respectively. With the increase of the scaling ratio, the length of the filter (ie, order ) are often large. Therefore, the implementation complexity is relatively large, and the calculation of general scaling will be implemented by hardware. For example, finite (N) line...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40
Inventor 张本好林福辉
Owner SPREADTRUM COMM (SHANGHAI) CO LTD