Aiming at this problem, log-polar algorithm was introduced.A new scene matching method was proposed, based on log-polar transformation, which had such trait as invariance to rotation.

• 针对这个问题，引入对数极坐标变换运算，根据它的旋转不变性，提出了一种新的基于对数极坐标变换的景象匹配方法。