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Movement detection method suitable for deinterlacing technique

A motion detection and de-interlacing technology, applied in the direction of standard conversion, etc., can solve the problems of motion misjudgment, ghost details, wrong interpolation, etc., to achieve accurate results, avoid misjudgment or omission, and improve picture clarity.

Inactive Publication Date: 2009-07-15
SICHUAN PANOVASIC TECH
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AI Technical Summary

Problems solved by technology

Due to the lack of information fields and pixels used, motion misjudgments or missed judgments may be caused by various situations, resulting in wrong interpolation based on motion detection de-interlacing interpolation, and finally affecting the de-interlacing effect, ghosting or Quality problems such as detail distortion

Method used

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Examples

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Embodiment Construction

[0027] 1. Determine the motion threshold T1 and the static threshold T2: Suppose that the human eye sensitivity threshold TM is selected according to the corresponding relationship curve between the mean value of two vertically adjacent points X=250 and the sensitivity of the human eye, and the value of TM is 24; then T1=TM+TM / 8=27; T2=TM-TM / 8=21;

[0028] 2. Calculate the vertical weight coefficient б: Determine the impact of the vertical data on the calculation of the field difference, and affect the calculation of the field difference in the form of weight. Set the third threshold T3=38; the fourth threshold T4=130;

[0029] V is the absolute difference between the pixel values ​​of two vertically adjacent points to be inserted, namely:

[0030] V=|f n (i-1,j)-f n (i+1,j)|;

[0031] According to the judgment conditions, the weight coefficient in the vertical direction is obtained:

[0032] if(V<38)

[0033] б=1.0;

[0034] ...

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Abstract

The invention relates to a method of motion detection section of de-interlacing technology. Technical problem to be solved of the invention is to provide a motion detection method with more accurate adaptive algorithm. A method applied for motion detection section of de-interlacing technology comprises steps of: a, setting a motion threshold T1 and a stillness threshold T2; b, calculating a first field difference, a second field difference and a frame difference; c, using a maximal value of the first field difference, second field difference and frame difference as a motion parameter; d, judging whether the motion parameter is more than the T1,if so, motion detection result of interpolation point to be detected is moving state; if not, judging whether the motion parameter is less than the T2, if so, motion detection result of interpolation point to be detected is still state, if not, motion detection result of interpolation point to be detected is between motion and still states. The invention takes adequate consideration of motion detection condition, which avoids misjudge and emissive judgement in the motion detection process to improve definition of picture.

Description

technical field [0001] The invention belongs to the technical field of digital image processing and video display, and in particular relates to a method for the motion detection part of the deinterlacing technology. Background technique [0002] The most commonly used broadcast television systems include NTSC 525-line 60Hz field frequency system (mainly used in North America and Japan) and 625-line 50Hz field frequency PAL system (mainly used in Europe and China). Flicker and line creep and other shortcomings, so it is inevitable to perform interlaced to progressive conversion, that is, de-interlacing technology. Video image deinterlacing technology is one of the important technologies that image processing is indispensable in the field of TV application at the present stage. [0003] The de-interlacing algorithm is divided into linear algorithm, nonlinear algorithm, motion adaptive algorithm and motion compensation algorithm according to the different types of filters used...

Claims

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Application Information

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IPC IPC(8): H04N7/01
Inventor 徐慧博刘强
Owner SICHUAN PANOVASIC TECH
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