So with the Circle Hough Transform, we expect to find triplets of(x,y,R)(x,y,R)from the image. In other words, our purpose is to find those three parameters. Therefore, we need to construct a 3D accumulator for Hough transform, which would be highly ineffective. So, OpenCV uses more...
而透视变换本质上空间立体三维变换，根据其次坐标方差，要把三维坐标投影到另外一个视平面，就需要一个完全不同的变换矩阵M，所以这个是透视变换跟OpenCV中几何仿射变换最大的不同。 OpenCV中透视变换的又分为两种： - 密集透视变换 - 稀疏透视变换 我们经常提到的对图像的透视变换都是指密集透视变换，
Hough transform is performed by quantizing the Hough space into finite intervals, known as accumulator cells. As it runs, each (𝑥𝑖,𝑦𝑖)(xi,yi) is transformed into a discretized (𝜌,𝜃)(ρ,θ) curve, and the accumulator cells which lie along this curve are incremented. By loo...
Hough transform is performed by quantizing the Hough space into finite intervals, known as accumulator cells. As it runs, each (𝑥𝑖,𝑦𝑖)(xi,yi) is transformed into a discretized (𝜌,𝜃)(ρ,θ) curve, and the accumulator cells which lie along this curve are incremented. By loo...