Field interpolation method

A technology of interpolation and interpolation direction, applied in the field of video processing, can solve problems such as insufficient direction selection, small-angle interpolation pixel points are far apart, isolated point noise, etc.

Inactive Publication Date: 2010-08-25
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 (as shown in Figure 1, the grayscale values ​​of the nine adjacent pixels in the upper row are a1, a2, a3, a4, a5, a6 from left to right , a7, a8, a9, the gray values ​​of 9 adjacent pixels in the lower row are b1, b2, b3, b4, b5, b6, b7, b8, b9 from left to right, and the nine points to be interpolated x) are calculated The pixel correlation of the direction, the pixel correlation of the direction is calculated by calculating the average performance of the absolute difference sum of the corresponding pixel gray levels in different directions, 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 corresponding pixel is p1, p2...p9:

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

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

[0031] p3: (|a5-b3|+|a6-b4...

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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 angleis 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 Patents(China)
IPC IPC(8): H04N7/01
Inventor 刘强陈涛徐慧博
Owner SICHUAN PANOVASIC TECH
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