IMAGE ANGLE DETECTION DEVICE AND SCAN LINE INTERPOLATION DEVICE HAVING THE SAME

摘要

A BINARIZER (2) BINARIZES A VIDEO SIGNAL INPUT FROM AN A/D CONVERTER (7) AND A VIDEO SIGNAL OUTPUT FROM A LINE MEMORY (1A) USING AN AVERAGE LUMINANCE VALUE PROVIDED FROM A DETECTION WINDOW VIDEO SIGNAL PROCESSOR (5) AS A THRESHOLD VALUE, AND OUTPUTS A BINARY PATTERN. A REFERENCE PATTERN GENERATOR (6) GENERATES A PLURALITY OF REFERENCE PATTERNS. AN ANGLE DETECTOR (3) COMPARES THE BINARY PATTERN WITH EACH OF THE PLURALITY OF REFERENCE PATTERNS, AND OUTPUTS THE ANGLE OF A MATCHED REFERENCE PATTERN AS ANGLE INFORMATION. AN ARC SHAPE DETECTOR (4) OUTPUTS THE EDGE ANGLE INFORMATION OF A PICTURE BASED ON A COMBINATION OF THE ANGLE INFORMATION OF AN INTERPOLATION SCANNING LINE INCLUDING AN OBJECT INTERPOLATION PIXEL AND THE ANGLE INFORMATION OF INTERPOLATION SCANNING LINES ABOVE AND BELOW THE INTERPOLATION SCANNING LINE.