| 摘要 |
PROBLEM TO BE SOLVED: To freely perform image enlargement/reduction processing according to an operation instruction of a user by reducing noise such as jaggie and displaying an image in the case of enlarging the image to display. SOLUTION: An image processing means 304 has an affine transformation means 346 for performing affine transformation on the basis of at least an enlargement ratio and a reduction ration in regard to the coordinates of a control point, the number of divisions setting means 348 for calculating the ratio of an actual drawing area to a drawing range in regard to a Bezier curve subjected to the affine transformation and setting the number of divisions of the parameter of the Bezier curve in accordance with the ratio, a Bezier curve operating means 350 for calculating the curve definition point of the number corresponding to the number of divisions on the basis of the set number of divisions and a coefficient based on a degree and a Bernstein basis function, a Bezier curve drawing means 352 for drawing the Bezier curve in an mage memory 405 on the basis of the obtained curve definition point. When the Bezier curve is not within the actual drawing area in particular, subsequent calculation processing is terminated in regard to the Bezier curve. |
