Affine invariance is an important research field about it.
射变换不变性是其中一个重要的研究内容。
The experimental results show that this algorithm is as robust as SIFT, but also acquires good performance on affine invariance of view point change, improves matching results greatly.
实验表明，改进后的算法继承了SIFT算法对图像缩放、旋转等不变性，而且增强了图像对视角的仿射不变性，极大地改善了匹配效果。
The features achieve partial invariance to local variations, such as affine or 3D projections, by blurring image gradient locations.
这个功能实现了模糊图像梯度点的局部变化的部分不变性，如仿射或三维投影。
The features achieve partial invariance to local variations, such as affine or 3D projections, by blurring image gradient locations.
这个功能实现了模糊图像梯度点的局部变化的部分不变性，如仿射或三维投影。
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