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Image de-interleaving method based on block partitioning

A de-interlacing and image technology, applied in the field of digital image processing, can solve problems such as low resolution and not fully considering the visual characteristics of the human eye

Active Publication Date: 2012-07-25
ANHUI YUNSEN INTERNET OF THINGS TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0011] 3) The visual characteristics of the human eye are not fully considered
General human visual persistence characteristics (the visual persistence time is generally 0.05-0.2 seconds), which will cause low resolution in areas where the image changes rapidly

Method used

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  • Image de-interleaving method based on block partitioning
  • Image de-interleaving method based on block partitioning
  • Image de-interleaving method based on block partitioning

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Embodiment Construction

[0055] As shown in the figure: the present invention is realized by the following steps to the specific embodiment of D1 (704 * 576) resolution image: (1) the image sequence with K frame is denoted as I k , k=0...K-1; the subscript k represents the image sequence number. The image size is M pixels high and N pixels wide. use I k (m, n) represents the pixel whose vertical coordinate is m and horizontal coordinate is n in the image. Vertical coordinates increase from top to bottom. The horizontal coordinates increase from left to right. The coordinates of the upper left pixel in the image are (0, 0), and the coordinates of the lower right pixel are (M-1, N-1). Divide the kth frame image into several image blocks k=0...K-1; j=0...(M / U)-1; i=0...(N / V)-1, superscript k means belonging to image I k , the subscripts j and i represent the j-th row and i-th column in the divided image block set. For the results of the split, see figure 1 . The image block has a height of U pixe...

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Abstract

The invention relates to a processing method of digital images, in particular to an image de-interleaving method based on block partitioning. The method comprises the following main steps of: a. partitioning input images into a plurality of image blocks in equal size; b. calculating a basic motion area and a non-basic motion area according to the difference of an image block corresponding to the front image and the back image; c. further calculating an expansion motion area at the non-basic motion area; d. carrying out de-interleaving treatment on the non-basic motion area and the expansion motion area. According to the image de-interleaving method based on block partitioning, the area in block, which needs de-interleaving treatment can be searched effectively; and details of a static image area are remained; sawteeth at edges of a motion target are eliminated effectively; and subjective feeling of an image sequence is improved greatly.

Description

technical field [0001] The invention relates to a processing method of a digital image, in particular to a method for removing sawtooth phenomenon in a digital image collected due to interlaced scanning. Background technique [0002] Since the video signals output by traditional analog cameras are divided into odd and even fields, the collected digital images are also divided into odd and even fields. Since the image acquisition time points of the two fields are different, the positions of the edges of the moving target in the two fields are displaced. When two images are interlaced and alternately synthesized into one frame of image, there will be jagged burrs on the edge of the moving target, which will seriously affect the subjective quality of the image. The method of removing these jagged burrs is generally called de-interleaving algorithm. [0003] A variety of deinterleaving algorithms have been studied, such as: [0004] Ji Zhongwei, Xu Linfeng, Zhu Weile, Fast De...

Claims

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Application Information

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IPC IPC(8): H04N5/21H04N7/01G06T5/00
Inventor 万森刘立强王家福
Owner ANHUI YUNSEN INTERNET OF THINGS TECH
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