此代码主要介绍了图像的稀疏映射，通过一副图像的四个点来确定映射函数，从而达到图像的映射，代码完整的解释了映射的详细算法-This code describes the mapping of the sparse image through an image four points to determine the mapping function, so as to achieve the image mapping, code complete a detailed explanation o

opencv学习代码，仿射变换，在几何上定义为两个向量空间之间的仿射映射，由一个线性变换接上一个平移组成-opencv learning code, affine transformation, geometrically defined as affine mapping between two vector spaces, connected by a linear transformation consisting of a pan