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Image interpolation method and device based on direction detection

An interpolation method and direction detection technology, which can be used in image data processing, graphic image conversion, details involving image processing hardware, etc., and can solve problems such as interpolation direction judgment errors.

Inactive Publication Date: 2008-02-13
POWERLAYER MICROSYST HLDG
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Problems solved by technology

[0004] The purpose of the present invention is to provide an accurate image interpolation method based on direction detection, solve the problem that the existing direction interpolation method is affected by external interference and generate interpolation direction judgment errors, and improve the accuracy of the final interpolation result

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  • Image interpolation method and device based on direction detection
  • Image interpolation method and device based on direction detection

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Embodiment Construction

[0042] In this part, the technical solution of the present invention will be described in detail with reference to the accompanying drawings.

[0043] Fig. 1 reveals the steps of the image interpolation method based on direction detection in the present invention, which will be described step by step here.

[0044] (1) Interpolation direction detection

[0045] In this step, the interpolation direction detection is first performed on the input pixel information to be processed.

[0046] Here, the first-order difference method is used to detect the interpolation direction of the pixel to be processed, that is, to calculate the brightness difference between adjacent pixels of the pixel to be processed. If the difference is smaller, the possibility of the direction being the interpolation direction is higher; on the contrary, If the difference is larger, the possibility that the direction is an interpolation direction is also lower. Generally, the minimum value obtained therein...

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Abstract

The invention belongs to an image interpolation method. In order to solve the problem of direction judgment errors caused by external interference in existing direction interpolation methods, the present invention provides an accurate direction detection-based image interpolation method and device. The image interpolation method based on direction detection includes the following steps: a. performing interpolation direction detection on pixels to be processed to obtain interpolation direction information of pixels; b. using the results of interpolation direction detection to perform interpolation on pixels to be processed, which also includes steps a and b. Step a' between steps: use the interpolation direction information of adjacent pixels of the pixel to be processed to correct the result obtained in step a; in step b, use the edge interpolation corrected in step a' to interpolate the pixel to be processed to the detection result. The invention can reduce or eliminate the influence of external interference such as noise on the interpolation direction detection result, and obtain more accurate interpolation result.

Description

technical field [0001] The invention belongs to digital image processing technology, in particular to an image interpolation method. Background technique [0002] In digital image processing, it is often necessary to perform image interpolation processing, for example, performing deinterlacing processing on interlaced images, or performing scaling processing on the size of images needs to be applied to image interpolation operations. [0003] Currently, there are three commonly used image interpolation methods: pixel replication, quadratic linear interpolation, and directional filtering. The directional filtering is also called directional interpolation, which is used to obtain the interpolation result of the pixel to be processed. The main method of directional filtering is to first detect the interpolation direction of the pixel to be processed, and interpolate the pixel to be processed according to the interpolation direction. It can be seen that when the direction filt...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40
CPCG06T3/403G06T2200/28
Inventor 周津柳崎峰
Owner POWERLAYER MICROSYST HLDG
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