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APPARATUS AND METHOD FOR DE-INTERLACING BASED ROUGH SETS THEORY
APPARATUS AND METHOD FOR DE-INTERLACING BASED ROUGH SETS THEORY
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机译：用于解交错的粗糙集理论的装置和方法
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摘要
An apparatus and a method for de-interlacing based on rough sets theory are provided to determine an interpolation method with an interpolation determination table based on the rough sets theory when converting an image signal in an interlaced scanning type into an image signal in a progressive scanning type, thereby obtaining an image of improved image quality. A difference value calculator(100) calculates a first difference value, a difference value between pixels positioned in the upper and lower parts of an interpolation target pixel in the pixel values of plural first pixels selected in a spatial window set to a current frame including the interpolation target pixel, and calculates a second difference value, a difference value between pixels positioned before and after the interpolation target pixel in the pixel values of plural second pixels selected in a temporal window set to the current frame including the interpolation target pixel and reference frames adjacent onto a time base. A maximum difference coefficient calculator(110) calculates a first maximum difference coefficient, a difference value between the maximum value and the minimum value in the pixel values of the first pixels, and calculates a second maximum difference coefficient, a difference value between the maximum value and the minimum value in the pixel values of the second pixels. A property value matrix generator(120) determines the property values of the first difference value and the second difference value based on a first threshold value previously set and determines the property values of the first maximum difference coefficient and the second maximum difference coefficient based on a second threshold value and a third threshold value previously set to generate a property value matrix composed of the property values. An interpolation method determiner sets an interpolation method corresponding to each of values, which the property value matrix has, and determines an interpolation method corresponding to the property value matrix based on an interpolation method determination table.
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