Motion compensation de-interlacing method based on adaptive interpolation

A motion compensation and self-adaptive technology, applied to color TV parts, TV system parts, standard conversion, etc., can solve the problems of jagged vertical edges, easy blurring of images, and inability to increase vertical resolution of images, etc.

Inactive Publication Date: 2011-04-20
ZHEJIANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

Interlaced scanning has some disadvantages: flicker, picture jitter, vertical edge jagged, etc.
[0005] These methods have their own shortcomings: spatial two-dimensional interpolation cannot increase the vertical resolution of the image, and the image is easy to blur; temporal two-dimensional interpolation will bring defects such as aliasing and feathering; motion compensation algorithms are extremely sensitive to motion estimation errors, error-prone

Method used

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  • Motion compensation de-interlacing method based on adaptive interpolation
  • Motion compensation de-interlacing method based on adaptive interpolation
  • Motion compensation de-interlacing method based on adaptive interpolation

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Embodiment Construction

[0047] Such as figure 1 As shown, the following examples illustrate the present invention based on adaptive interpolation motion compensation de-interlacing method, the steps are as follows:

[0048] (1) For a pixel point P(i, j) to be processed in one of the fields in the input video image (take the t-th field as an example), determine whether the pixel point to be processed needs interpolation processing, if i is 2 If the remainder is equal to t and takes the remainder of 2, interpolation processing is not required, and the gray value of P(i, j) remains unchanged and enters step (9); otherwise, step (2) is performed;

[0049] (2) Taking the t-1th field image as a reference image, perform motion estimation on the backward macroblock whose coordinates are the pixels corresponding to the pixel point P(i, j) to be processed in the t+1th field image, and obtain The first motion vector (MV x , MV y );

[0050] (3) The first motion vector (MV x , MV y ) and the preset motion ...

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Abstract

The invention discloses a motion compensation de-interlacing method based on adaptive interpolation, which belongs to the technical field of image signal processing. The method comprises the following steps: performing motion estimation on an input video image by a centre bias diamond search algorithm to obtain a motion vector of a corresponding location; interpolating pixel points by a motion compensation method of time back projection; performing edge detection on the pixel points not meeting the motion compensation conditions; and judging whether the pixel point to be processed is on the edge. The edge direction of the pixel points on the edge is calculated and directional interpolation is performed; average interpolation is performed on the pixel points which are not on the edge; and the entire image is traversed to finish the de-interlacing processing of the entire image. Through the invention, adaptive selective interpolation is performed on the information such as motion vector and edge, the advantages of motion compensation interpolation and edge adaptive directional interpolation are automatically combined, the interpolation error caused by inaccurate motion estimation is suppressed, and the edge continuity and picture sharpness are protected.

Description

technical field [0001] The invention belongs to the technical field of image signal processing, and relates to a motion compensation de-interlacing method based on adaptive interpolation. Background technique [0002] Interlaced scanning technology is to divide each frame of image into odd field and even field. The line scanning frequency of interlaced scanning is half of that of progressive scanning, and the frequency spectrum of video signal and the channel bandwidth of transmitting video signal are also half of that of progressive scanning. Due to the persistence of vision effect, the human eye will see smooth motion instead of flickering half-frame images, which effectively increases the utilization of the channel when the subjective image quality is not degraded much. Due to the early communication The technology is underdeveloped. In order to save the limited bandwidth, interlaced scanning technology is widely used in traditional analog signal TV. Interlaced scanning ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/01H04N5/14
Inventor 丁勇宋文华孙纲德王翔张渊叶森贾梦楠刘晓东严晓浪
Owner ZHEJIANG UNIV
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