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Fast image interpolation method for mobile terminal

A mobile terminal, interpolation method technology, applied in image data processing, graphic image conversion, instruments, etc., to achieve the effect of high magnification, arbitrarily variable magnification ratio, and low algorithm complexity

Inactive Publication Date: 2015-11-04
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0016] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a fast image interpolation method for mobile terminals, which can improve the quality of mobile phone image interpolation as much as possible and obtain high-resolution images while ensuring low computational complexity.

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with specific examples.

[0039] In recent years, many image interpolation algorithms based on edge information have been proposed. This type of edge protection algorithm is mainly divided into two categories: the algorithm based on the edge of the original LR image and the algorithm based on the edge of the HR image after interpolation.

[0040] The edge protection algorithm based on the original low-resolution image (LR image) first detects the edge of the original low-resolution image, and divides the image into two categories: edge area and non-edge area according to the edge information. The traditional interpolation algorithm is used for the non-edge area, and the special interpolation algorithm is used for the edge area to achieve the purpose of protecting the edge details. Its advantage is fast interpolation. The specific flow chart is attached Figure 7 shown.

[0041] The edge protection ...

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Abstract

The present invention discloses a fast image interpolation method for a mobile terminal. The fast image interpolation method comprises the steps of: firstly, performing edge detection on a low-resolution original image to obtain edge information, calculating the strength of an edge according to the edge information of the low-resolution original image and a human visual system, expanding the edge according to the strength, dividing the image into an edge region and a non-edge region according to the expanded edge, processing the edge region by adopting an interpolation algorithm with relatively high fidelity, and storing the edge information; and secondly, processing the non-edge region by adopting a faster bicubic interpolation algorithm, then further sharpening the edge of an interpolation image according to the existing edge information to reduce the blurriness of the edge and prompt the visual quality of the image, and at last combining the interpolation algorithm with an NEON parallel technology to obtain a high-resolution image subjected to parallel optimization. The result of the application of the technology to a mobile video monitoring system shows that the technology can ensure that multimedia applications of a mobile phone can smoothly interpolate high-resolution images for playing.

Description

technical field [0001] The invention relates to the field of image interpolation technology and parallel computing of mobile terminals, in particular to a fast image interpolation method suitable for mobile terminals using NEON technology for parallel processing optimization. Background technique [0002] Image interpolation is a commonly used image processing technique in digital image processing. Image interpolation is the process of generating a high-resolution target image from the original low-resolution image through regeneration of image data. In the interpolation process, since only the signal at the sampling point in the original low-resolution image is known, but the signal at the non-sampling point is not known, artifacts inevitably appear. Such as blocking artifacts (Blocking Artifacts), ring artifacts (Ring Artifacts), jagged artifacts (Jaggies), etc., especially in the edge area is more obvious. Because the essence of these artifacts is the loss of edge detai...

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Application Information

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IPC IPC(8): G06T3/40
CPCG06T3/4023G06T3/4053
Inventor 张星明刘雪赟刘俊陈伟健
Owner SOUTH CHINA UNIV OF TECH
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