Field interpolation method

A technology of interpolation and interpolation direction, which is applied in the field of video processing and can solve the problems of easy generation of aliasing, small-angle interpolation pixels are far apart, and the direction selection is not enough.

Inactive Publication Date: 2009-05-20
SICHUAN PANOVASIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Insufficient selection of direction may easily produce sawtooth;
[0006] 2. Small angle interpolation is easy to introduce isolated point noise because the selected pixels are far apart

Method used

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Embodiment Construction

[0028] 1. Pixel grayscale information existing in the upper and lower rows of the point to be interpolated (such as figure 1 As shown, the gray values ​​of the 9 adjacent pixels in the upper row are a1, a2, a3, a4, a5, a6, a7, a8, a9 from left to right, and the gray values ​​of the 9 adjacent pixels in the lower row are from From left to right, b1, b2, b3, b4, b5, b6, b7, b8, b9, the point to be interpolated x) calculates the pixel correlation in nine directions, and the pixel correlation of the direction is calculated by calculating the corresponding pixel points in different directions The average performance of the absolute difference sum of gray levels, a total of nine directions, the first direction to the ninth direction (10°, 20°, 45°, 60°, 90°, 120°, 135°, 160°, 170°) The average value of the absolute difference sum of the gray value of the pixel is p1, p2...p9 respectively:

[0029] p1: (|a7-b1|+|a8-b2|+|a9-b3|) / 3

[0030] p2: (|a6-b3|+|a7-b4|) / 2

[0031] p3: (|a5-...

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Abstract

The invention relates to video processing technology. The technical problem to be solved is to provide a field interpolation method for determining interpolation direction by considering more angle pixel correlations and eliminating isolated point noise. The reference angle of the invention picks up nine directions, namely four small angle directions and five adjacent directions. If a small angle is chosen for interpolation in certain areas with small pixel correlation difference, noise points can be introduced to the area. Therefore, as long as the pixel correlation in adjacent directions achieves a first preset value, the small angle factor can not be considered to interpolate in the largest pixel correlation in five adjacent directions. If the small angle is considered, whether the pixel correlation of the supplementary angle of the small angle is smaller than a second preset value is determined, if yes, the small angle is selected; and if not, the largest pixel correlation direction in the five adjacent directions is chosen for interpolation. The method can acquire results of smooth edges and flicker-free details.

Description

technical field [0001] The invention relates to a video processing technology, in particular to a technology for converting an interlaced video signal to a progressive video. technical background [0002] Due to the limitation of transmission bandwidth, the TV signals sent by TV stations are not complete images, but a scene is divided into two parts, odd field and even field, and sent in time-sharing, thus generating interlaced video signals. However, with the continuous development of digital signal processing technology and the emergence of wide-screen flat-panel TVs, people's requirements for TV display quality are getting higher and higher. When the interlaced signals sent by TV stations are displayed on current high-end flat-panel TVs, severe screen flicker will occur. , sawtooth and other serious problems. De-interlacing technology was created to solve the conflict between interlaced video signals and high-end TVs. [0003] The de-interlacing algorithm is divided int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/01
Inventor 刘强陈涛徐慧博
Owner SICHUAN PANOVASIC TECH
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