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Edge-sensitive intra-field de-interlacing method

An intra-field de-interlacing, sensitive technology, applied in color TV parts, TV system parts, standard conversion, etc., can solve the problem of edge aliasing effect, unsatisfactory de-interlacing effect, loss of image details, etc. , to achieve accurate edge pre-judgment, maintain edges and details, and improve accuracy

Inactive Publication Date: 2014-03-19
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

The most common intra-frame deinterlacing algorithm is to average the upper and lower points of the interpolated pixel point. Although this method is simple, it will bring serious aliasing effects on the edges
The intra-frame de-interlacing method based on edge detection often loses image details due to missed detection and mis-picking, and cannot obtain satisfactory de-interlacing effects

Method used

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Such as figure 1 As shown, an edge-sensitive intra-field deinterlacing method includes the following steps:

[0040] In step S01, the gradients in the horizontal and vertical directions and the magnitude of the gradients are calculated according to a specially designed gradient operator. The gradient operators used in this method include gradient operators in the horizontal direction and gradient operators in the vertical direction, and the weight distribution of each gradient operator is as follows: figure 2 shown. These two operators are used to calculate the horizontal gradient Gx and vertical gradient Gy of each pixel to be interpolated. Its calculation formula is as follows:

[0041] Gx=f(i-4, j-2)+4f(i-4, j-1)-4f(i-4, j+1)-f(i-4, j+2)+2f(i- 2,j-2)+5f(i-2,j-1)-5f(i-2,j+1)-2f(i-2,j+2)+6f(i,j-2)+6f (i, j-1)-6f(i, j+1)-6f(i, j...

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Abstract

The invention relates to an edge-sensitive intra-field de-interlacing method. The edge-sensitive intra-field de-interlacing method comprises the following steps of 1 performing interpolation on all of pixel points to be interpolated by means of a method for obtaining a mean value of every two adjacent pixel points in the vertical direction; 2 utilizing a gradient operator to calculate the gradients and gradient magnitudes of each pixel point to be interpolated in the horizontal direction and the vertical direction according to known pixel points; 3 judging regions where pixel points to be interpolated are located according to the gradient magnitudes; 4 selecting a plurality of pixel points in a complicated region to form three row vectors; 5 selecting row vectors for follow-up calculation according to the corresponding relation of the gradients in the horizontal direction and the vertical direction; 6 calculating a difference value of each pixel point in the selected row vectors and an existing pixel point to obtain a pixel point with a minimum difference value absolute value, namely a most similar pixel point; 7 performing interpolation on the pixel point to be interpolated corresponding to the position of the most similar pixel point. Compared with the prior art, the edge-sensitive intra-field de-interlacing method has the advantages of being low in computation complexity, high in accuracy and the like.

Description

technical field [0001] The invention relates to an image or video de-interlacing method, in particular to an edge-sensitive intra-field de-interlacing method. Background technique [0002] In analog TV broadcast systems such as NTSC, PAL, and SECAM, interlaced scanning technology has become the standard, and today's high-definition digital TV broadcast systems also retain this scanning format. Because it can not only save the bandwidth of video transmission, but also maintain the existing transmission channel. However, with the development of new flat panel displays such as liquid crystal displays and plasma displays, progressive scan video has gradually become a mainstream demand. Because nearly all newer monitors require progressive video input. Moreover, interlaced video will have undesirable visual effects such as interline flickering, jumping, and edge jagged edges. In order to overcome these problems, deinterlacing technology, which can convert interlaced video to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/01H04N5/14
Inventor 张昊王若琳李乔峰刘文江刘涛戎蒙恬
Owner SHANGHAI JIAO TONG UNIV
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