Method for restoring missing lines in interlaced video image
A technology of interlaced video and restoration method, applied in image communication, parts of color TV, parts of TV system, etc., can solve the problems of close restoration of progressive image, misjudgment of matching detection, etc.
Inactive Publication Date: 2011-09-21
FUJITSU MICROELECTRONICS SHANGHAI
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[0012] The purpose of the present invention is to provide a method for recovering missing lines in an interlaced video image, so as to solve the technical problem that the current small-angle interpolation method easily leads to misjudgment of matching detection and thus cannot restore the original progressive image most closely
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[0022] The following is based on Figure 4 to Figure 6 , give a preferred embodiment of the present invention, and give a detailed description, so that the functions and characteristics of the present invention can be better understood.
[0023] The small-angle interpolation method and system in the present invention utilize the matching detection result of the previous missing row to check the matching detection result of the current missing row, and judge whether the matching detection result of the current missing row is valid. Small-angle interpolation is performed on the matching detection results judged to be valid, and the traditional upper and lower average method is used on the matching detection results judged to be invalid.
[0024] The first step is match detection. First of all, we need to limit the minimum value of the angle in the small-angle interpolation operation, which is realized by specifying the width of the small-angle interpolation window. Such as F...
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The invention discloses a method for restoring missing lines in an interlaced video image. The method comprises the following steps: setting a small-angle interpolation window; setting a matching detection window; calculating an optimum matching detection value; acquiring a corresponding pixel H in the former missing line along a direction corresponding to the optimum matching detection value; judging whether the absolute value of difference of the optimum matching direction information and the optimum matching direction information of the corresponding pixel H in the former missing line is less than or equal to a threshold set by a user; and if so, calculating and restoring the current lack pixel by using the interpolated value in the optimum matching direction. According to the method, the effectiveness of the matching detection of the current missing line is judged by using the matching detection result of the former missing line, thereby greatly reducing the erroneous judgment of the matching detection and improving the accuracy of the matching detection, and further applying a small-angle interpolation method to the restoration of the missing lines in the interlaced video image successfully so as to achieve more accurate restoration of the missing lines in the image.
Description
[0001] technology neighborhood [0002] The invention belongs to the field of digital video signal processing, and in particular relates to a method for recovering missing lines in interlaced video images. Background technique [0003] For interlaced digital video signals, the traditional motion-adaptive de-interlacing method usually uses 3D information for interpolation for still images, and uses 2D information for interpolation for moving images. Here, 2D means information in an interlaced image, that is, intra-field information. The problem discussed in the present invention is how to generate missing lines in interlaced video images by means of 2D intra-field interpolation. [0004] Such as figure 1 As shown, for an interlaced image, there is only half of the image information of odd or even lines, that is, the odd field image only contains the odd scanning lines of the image, and the even field image only contains the even scanning lines of the image. Odd field and eve...
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Inventor 朱舸俞诚张琦鲁恒
Owner FUJITSU MICROELECTRONICS SHANGHAI