基于对数极坐标变换的灰度投影稳像算法

常规的灰度投影稳像算法仅能对存在平移运动的图像进行稳像，而对具有旋转和尺度变化的图像无能为力。为了克服灰度投影算法这一局限性，提出了基于图像对数极坐标变换(LPM)的灰度投影稳像算法，把具有尺度和旋转变化的图像进行对数极坐标变换，这样笛卡儿坐标系下图像的旋转和尺度变化在对数极坐标系下表现为平移变化，从而能够用灰度投影算法处理旋转和尺度变化问题。

Gray projection image stabilizing algorithm based on log-polar image transform

Traditional gray projection image stabilizing algorithm just works under horizontal and vertical movement; but it is unable to deal with either scaling or rotation of the matched images. Due to the limitation, a gray projection image stabilizing algorithm based on log-polar image transform was introduced. When log-polar image transform was used in scaling or rotation image, the scaling or rotation movement in Descartes reference frame was represented by horizontal and vertical movement in log-polar reference frame. Accordingly, gray projection algorithm could be used in scaling or rotation image.