Patent ID: 8121441
Filing Date: 2012-02-21
Classification: G06T

Abstract:
1. An image processing apparatus arranged to acquire a rotated image by performing a process of rotating a raster image, which corresponds to an original image, comprising: an integer parameter input unit to which a first integer parameter and a second integer parameter having a ratio value that is equal to a tangent value of a rotation angle are input; an original image corresponding position calculating unit arranged to perform: a two-dimensional interpolation unit arranged to use the corresponding target pixel of the original image and three pixels each having at least one of the x-coordinate and the y-coordinate that are different by prescribed pixels from the corresponding target pixel, so as to acquire a pixel value of the target pixel of the rotated image by performing two-dimensional interpolation by a ratio acquired by dividing the x-direction weighting factor by the second integer parameter and a ratio acquired by dividing the y-direction weighting factor by the second integer parameter.