在一个平面上，做90度旋转的变换，逆时针方向。
Let's say that in the plane we look at the transformation that does rotation by 90 degrees let's say, counterclockwise.
然后，用旋转变换方法搜索出各个方向展布的局部极大（极小）值线的端点；
Then, the rotation transformation method is applied to searching maximum (or minimum) line endpoints in all directions.
在设计方向滤波器时，对滤波器的旋转引入了方—圆变换的方法，进而减少了计算的复杂度，同时避免引入误差。
While designing orientation filter, we introduced the square-circle transform to rotate filter, thus we reduced computing complexity and avoided imported errors.
充分利用双树复小波变换的旋转不变性、良好的方向选择性以及有限的冗余等优点，将其有效地应用于纹理特征提取过程中。
The excellent characteristics of rotation-invariance, good orientation selection and finite redundancy are fully utilized, and applied in texture feature extraction.
对方向性强的纹理，在进行旋转变换后，可以提高纹理分类的正确率。
The result suggested that the correct classification ratio be increased by rotative transformation for the textures with intense direction.
针对水平扫描线直线路径变形的基础上，提出使用几何旋转变换来实现任意方向的变形。
Scan lines can only be processed in horizontal manner, with the use of geometric transformations; it can make deformation done in any direction.
针对水平扫描线直线路径变形的基础上，提出使用几何旋转变换来实现任意方向的变形。
Scan lines can only be processed in horizontal manner, with the use of geometric transformations; it can make deformation done in any direction.
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