Video processing apparatus for processing pixel for generating high-picture-quality image, method thereof, and video printer to which they are applied
AssigneeSony Corporation
InventorMasaki Kishimoto
Life of this patent
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Abstract
A video processing apparatus according to the present invention includes edge detecting means for detecting an edge direction of an image, coefficient selecting means for selecting a coefficient based on the edge direction detected by the edge detecting means, and filter means for filtering a frequency band by using a frequency characteristic corresponding to the coefficient selected by the coefficient selecting means, wherein the number of pixels of the image is enlarged twice.
Claims5
A video processing apparatus, comprising:
- a plurality of enlarging means for up-sampling video data to enlarge the number of pixels by a predetermined scale factor;
- each enlarging means having an up-sampler and a multi-tap interpolation filter;
- decimating means for decimating said pixels of the enlarged video data at a desired ratio by selecting for output those pixels having positions nearest desired output positions such that the resolution of said video data is converted at a desired scale factor.
A video processing method, comprising the steps of:
- up-sampling video data to enlarge the number of pixels by a predetermined scale factor using a plurality of interpolators;
- each interpolator having an up-sampler and a multi-tap interpolation filter;
- decimating said pixels of the enlarged video data at a desired ratio, by selecting for output those pixels having positions nearest desired output positions such that the resolution of said video data is converted at a desired scale factor.
A video printer for subjecting video data of a picture to a predetermined image resolution converting processing to carry out the printing with a print head by using the converted video data, comprising:
- a plurality of enlarging means for up-sampling video data to enlarge the number of pixels by a predetermined scale factor;
- each enlarging means having an up-sampler and a multi-tap interpolation filter;
- decimating means for decimating said pixels of the enlarged video data at a desired ratio by selecting for output those pixels having positions nearest desired output positions such that the resolution of said video data is converted at a desired scale factor, thereby an output image being printed.
Dependencies are inferred from the claim text.