| 摘要 |
An image processing apparatus having a function for rotating image data stored in a memory by 90 DEG while preventing deterioration of image quality. Upon image reading, if the line density in a subscanning direction is lower than the pixel density in a main-scanning direction, the line density is raised close to the pixel density. The reading control is performed in accordance with possibility of 90 DEG rotation of image in a destination apparatus or a specific size of an original image. This attains efficient use of image memory.
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