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CHARACTER STRING INCLINED ILLUSION GENERATION APPARATUS, CHARACTER STRING INCLINED ILLUSION GENERATION METHOD, PRINTING MEDIUM MANUFACTURING METHOD, ELECTRONIC MEDIUM MANUFACTURING METHOD AND PROGRAM
CHARACTER STRING INCLINED ILLUSION GENERATION APPARATUS, CHARACTER STRING INCLINED ILLUSION GENERATION METHOD, PRINTING MEDIUM MANUFACTURING METHOD, ELECTRONIC MEDIUM MANUFACTURING METHOD AND PROGRAM
PROBLEM TO BE SOLVED: To provide a character string inclined illusion generation apparatus, a character string inclined illusion generation method, a printing medium manufacturing method, an electronic medium manufacturing method and a program capable of automatically creating a character string causing a character string inclined illusion from an arbitrary character set.SOLUTION: The character string inclined illusion generation apparatus stores a character image of plural characters and a test image in which one or more line segments or graphics are arranged in a character disposition direction using a graphic having a shape close to a shape of a line segment or a line segment in the character disposition direction as one character unit; generates a character test image by replacing the line segment or graphic equivalent to one character unit on the test image with the character image of the stored characters; calculates a difference of azimuth component between the character test image of characters and the test image before replaced with the characters using a filter having an orientation selectivity in the vicinity of character disposition direction; and creates a character string for generating a character string inclined illusion by disposing characters selected from the plural characters in the character disposition direction using a small difference in azimuth component as a reference.
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