摘要
首先证明矩形与其外接矩形或内接矩形中心重合这一命题。
A propoition that the centers of the rectangle and its inscribed rectangle of its circumscribed rectangle match together is first proved.Then according to this proposition derived a coordinate transformation formula which can be used for an image beins rotated any angle, then directly displayed on the screen.
出处
《西北建筑工程学院学报（自然科学版）》
1998年第4期64-67,共4页
Journal of Northwestern Institute of Architectural Engineering
关键词
算法
图像旋转
内接矩形
外接矩形
图像处理
algorithm
image rotaton inscribed rectangle
circumscibed rectangle
