An Intra-field Deinterlacing Method Based on Bilateral Filtering and Multidirectional Interpolation

An intra-field deinterlacing and bilateral filtering technology, applied in the field of video processing, which can solve the problems of image shaking, affecting the accuracy of interpolation results, rarely considering the distance relationship between adjacent pixels, etc., to achieve accurate interpolation results, low storage overhead, hardware low cost effect

Active Publication Date: 2019-03-22
TIANJIN UNIV
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Problems solved by technology

This type of algorithm can provide better de-interlacing effect in some cases with large motion range, but for some cases with rich details and many narrow edges, the de-interlacing effect is not very good, which will cause image shaking
And most of these algorithms only consider the similarity of pixel values ​​between adjacent pixels, and rarely consider the distance relationship between adjacent pixels, which will affect the accuracy of interpolation results to a certain extent

Method used

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  • An Intra-field Deinterlacing Method Based on Bilateral Filtering and Multidirectional Interpolation
  • An Intra-field Deinterlacing Method Based on Bilateral Filtering and Multidirectional Interpolation
  • An Intra-field Deinterlacing Method Based on Bilateral Filtering and Multidirectional Interpolation

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Embodiment approach

[0046] 1. Input the interlaced scanning video sequence, and the fields to be interpolated are selected sequentially from the start field to the end field according to the time sequence. For each pixel to be interpolated (i, j) in the field, select a total of 10 adjacent original pixels, namely (i-1, j-2), (i-1, j-1) , (i-1, j), (i-1, j+1), (i-1, j+2), (i+1, j-2), (i+1, j-1), ( i+1, j), (i+1, j+1), (i+1, j+2).

[0047] 2. Use the 10 adjacent original pixels and the 4-tap Wiener filter interpolation algorithm (the schematic diagram is as follows figure 2 shown) in and interpolate at. The specific interpolation method is as follows:

[0048]

[0049]

[0050]

[0051]

[0052] 3. Since the considered θ is 45°, 63°, 90°, 117° and 135°, a relatively sufficient natural image training is used to finally determine σ r and σ d The value of 30, 0.5. Use σ r =30 and the corresponding pixel value into the following formula to calculate (θ is 45°, 63°, 90°, 117° a...

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Abstract

Disclosed is a field deinterlacing method based on bilateral filtering multidirectional interpolation. The method has the following steps: inputting an interlacing scanning video sequence; for the condition when adjacent non-original pixel points are used, two closest adjacent non-original pixels in the direction of a theta angle are solved by use of an image interpolation algorithm; closest adjacent original pixel points and the adjacent non-original pixels in the direction of the theta angle are collectively called closest adjacent pixel points, and a pixel value similarity relation between the two closest adjacent pixel points is represented by use of a weight function comprising a Gauss nucleus; a distance closeness relation between the two closest adjacent pixel points is represented by use of a weight function comprising a Gauss nucleus; through combination with the pixel value similarity relation between the two closest adjacent pixel points and the distance closeness relation between the two closest adjacent pixel points, a weight value is calculated; and through combination with the weight value and a pixel value of each of the two adjacent pixel points distanced closest to a to-be-interpolated pixel point, a final interpolation result is calculated. According to the invention, the interpolation result is more accurate.

Description

technical field [0001] The invention relates to a video processing technology. In particular, it relates to an intra-field de-interlacing method based on bilateral filtering and multi-directional interpolation. Background technique [0002] Based on the consideration of the compatibility of traditional analog TV and the cost saving of transmission bandwidth, most radio and television systems at this stage use interlaced scanning formats in the transmission of television signals, including NTSC, PAL, SECAM and other radio and television systems. However, interlacing can cause visual artifacts such as edge flicker, jaggies, and field-to-field aliasing. The current mainstream digital TV mainly supports progressive scanning, so de-interlacing operation is required. The essence of deinterlacing is to interpolate missing pixels and remove visual defects caused by interlacing. [0003] At present, predecessors have proposed a variety of deinterlacing algorithms, and these deinte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/01H04N5/14
CPCH04N5/142H04N7/012
Inventor 张涛陈有志
Owner TIANJIN UNIV
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