Patent ID: 7432979
Filing Date: 2008-10-07
Classification: H04N

Abstract:
1. An image processing apparatus for converting to a progressive signal an interlaced signal containing a signal that has been converted from a different format to an image signal with original-image frames re-arranged in a prescribed sequence and with a standard frame rate, the apparatus being operable whether or not the interlaced signal also contains an unconverted image signal of said standard frame rate and comprising: signal-generating means for performing intra-field interpolation on a present field to generate a pixel of interest in an interpolated scanning line in a progressive, intra-field interpolated signal from a scanning line in a field that follows the present field in time and is located at the same position as the interpolated scanning line of the present field, or from a scanning line in a field that precedes the present field in time and is located at the same position as the interpolated scanning line of the present field; and double-image detecting means for determining, for each pixel in the interpolated field, whether the pixel of interest in the intra-field interpolated signal, is a pixel included in pixels that constitute a double-image portion of the intra-field interpolated signal by sensing whether a pair of lines spaced closer to each other in the interpolated field exhibit a lower correlation than the correlation exhibited by a pair of lines spaced farther from each other in said interpolated field.