Patent ID: 7872687

Claim:
A scanning-line interpolating circuit for creating pixel data for an interpolating pixel based on pixel data of a plurality of first pixels on a scanning line occurring at least one line forward relative to a scanning line on which said interpolating pixel exists and on pixel data of a plurality of second pixels on a scanning line occurring at least one line backward relative to said scanning line on which said interpolating pixel exists, comprising: an interpolating angle judging unit to judge an angle, relative to a direction of said scanning line on which said interpolating pixel exists, at which there is a strongest correlation between one of pixel data blocks of said first plurality of pixels and one of pixel data blocks of said second plurality of pixels located on a straight line passing through said interpolating pixel; and a pixel data matching degree judging unit to judge a degree of matching in pixel data between a first central pixel, out of said plurality of first pixels, located on a scanning line whose direction is same as that of said scanning line on which said interpolating pixel exists and each of first reference pixels comprising specified pixels occurring on a periphery of said first central pixel and a second central pixel, out of said plurality of second pixels, located on said scanning line whose direction is same as that of said scanning line on which said interpolating pixel exists and each of second reference pixels comprising specified pixels occurring on a periphery of said second pixels, and wherein, when said degree of matching is higher than a predetermined specified value, interpolation in a direction vertical to a direction of said scanning line on which said interpolating pixel exists is performed and when said degree of matching is smaller than said predetermined specified value, interpolation at an angle, judged by said interpolating angle judging unit, in a direction corresponding to an angle providing a strongest correlation in pixel data is performed.