| 摘要 |
PURPOSE:To reduce the capacity of a buffer memory in a picture distortion correction method for correcting the two-dimensional distortion of pictures. CONSTITUTION:The coordinate transformation of the pictures in the vertical direction is not performed and only the coordinate transformation (9) in the horizontal direction is performed. To put it concretely, when the optional coordinate of an input picture is defined as (x', y'), the coordinate after correcting the picture distortion is defined as (x, y), the coordinate of a picture center is defined as (x0, y0) and a parameter for indicating the distortion ratio of the picture is defined as (k), the coordinate of the input picture is calculated by using address conversion expressions indicated by linear expressions, x'={1-k(y-y0)<2>}x+k(y-y0)<2>x0 and y'=y, the data of the calculated coordinate of the input picture are calculated by performing linear approximation with the near data and thus, a picture distortion correction processing is performed. |
