Image interpolation method and image interpolation apparatus

An interpolation method and image technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of long time consumption and high hardware requirements

Inactive Publication Date: 2015-09-02
BOE TECH GRP CO LTD
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Problems solved by technology

[0004] However, when using these existing two-dimensional interpolation kernels for interpolation operations, when a smaller two-dimensional interpolation kernel is selected for operation, there is often obvious jaggedness or distortion in the final imag

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  • Image interpolation method and image interpolation apparatus
  • Image interpolation method and image interpolation apparatus

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Embodiment Construction

[0134] In order for those skilled in the art to better understand the technical solution of the present invention, an image interpolation method and an image interpolation device provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0135] figure 1 The flow chart of the image interpolation method provided by Embodiment 1 of the present invention, such as figure 1 As shown, the image interpolation method is used to interpolate the image, and the image interpolation method includes:

[0136] Step 101: Obtain edge point information on the image.

[0137] Optionally, step 101 includes:

[0138] Step 1011: Calculate the gradient magnitude and gradient direction of each pixel on the image.

[0139] In this embodiment, the case of using the Sobel operator to solve the gradient is taken as an example for illustration.

[0140] First, convert the Sobel operator into two one-dimensional filter coefficients, horizontal and ve...

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Abstract

The invention discloses an image interpolation method and an image interpolation apparatus. The image interpolation method comprises: edge point information of an image is obtained; according to the edge point information and peripheral reference points of a to-be-interpolated point, whether the to-be-interpolated point is located in an edge region is determined; if so, an angle class which the edge direction of the to-be-interpolated point belongs to is obtained, wherein edge directions of pixel points of the image are classified into m angle domains in advance and the m angle domains are divided into n angle classes in advance; on the basis of the angle class which the edge direction of the to-be-interpolated point belongs to, a corresponding one-dimensional horizontal interpolation kernel is used for carrying out horizontal interpolation on the to-be-interpolated point; and after horizontal interpolation completion, vertical interpolation is carried out on the to-be-interpolated point by using a preset one-dimensional vertical interpolation kernel. On the basis of the technical scheme, the image quality after interpolation processing can be guaranteed; the computation complexity during the interpolation process can be reduced; and software and hardware resources that may be occupied during the interpolation process can be reduced.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an image interpolation method and an image interpolation device. Background technique [0002] In a video display system, due to the various resolutions of video sources, video input signals need to undergo image interpolation and scaling before being sent to a display device for display. Since the performance of image interpolation scaling directly determines the quality of video display, video display systems urgently need high-quality image interpolation scaling to improve users' visual experience. [0003] At present, some existing two-dimensional interpolation kernels such as Nearest interpolation kernel, Bilinear interpolation kernel, Bicubic interpolation kernel, Lanczos interpolation kernel (including: Lanczos1 interpolation kernel, Lanczos2 interpolation kernel, Lanczos4 interpolation kernel and Lanczos6 interpolation kernel) are often used in the prior art. Kernel to ...

Claims

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Application Information

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IPC IPC(8): G06T3/40
CPCG06T3/4007G06T3/403G06T2207/20012G06T2207/10004G06T7/13G06V10/44G06F2218/12G06T2207/20192
Inventor 段然张丽杰
Owner BOE TECH GRP CO LTD
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