Patent ID: 8022946
Filing Date: 2011-09-20
Classification: H04N

Abstract:
1. A wipe pattern generation apparatus for inputting position information corresponding to each pixel on a display screen as polar coordinate data represented by a combination of angle data θ and distance data r from the polar coordinate center and outputting the comparison result between the polar coordinate data and predetermined pattern information, said wipe pattern generation apparatus comprising: a sin θ calculation section for calculating sin θ from the input angle data θ; a first multiplication section for multiplying the calculation result of sin θ by a first coefficient; a cos θ calculation section for calculating cos θ from the angle data θ; a second multiplication section for multiplying the calculation result of cos θ by a second coefficient; a third multiplication section for multiplying the result of adding output of said first multiplication section and output of said second multiplication section by a third coefficient, and outputting the third coefficient multiplied by the result of adding output of said first multiplication section and output of said second multiplication section as a reciprocal of the distance from the polar coordinate center to an arbitrary line on the display screen; a fourth multiplication section for multiplying output of said third multiplication section by the distance data r; and a comparison section for making a comparison between output of said fourth multiplication section and a fourth coefficient.