| 摘要 |
<p>A digitization section digitizes a video signal input from an A/D converter and a video signal output from a line memory by using an average luminance value given from an in-detection window video signal processor as a threshold value and outputs a digitized pattern. A reference pattern generation section generates a plurality of reference patterns. An angle detection section compares the digitized pattern to each of the reference patterns and outputs an angle of the matched reference pattern as angle information. An arc shape detection section outputs image edge angle information and arc shape information from a combination of angle information on an interpolation scan line upper by one line than the interpolation scan line including an interpolation pixel as an object, angle information on an interpolation scan line lower by one line than the interpolation scan line including the interpolation pixel, and the angle information on the interpolation scan line.</p> |
