软件设计部分旨在通过边缘检测以提取球体边界，再利用霍夫变换求得球心坐标位置从而获取球体的位置信息进而计算出速度大小。
As to software design, we adopt Hough transform theory to calculate the coordinate of the ball's center in order to work out the velocity, by the way of edge detecting of the sphere.
该方法首先基于邻域灰度极值提取边界候选图像，然后以边界候选象素及其邻域象素的二值模式作为样本集，输入边缘检测神经网络进行训练。
The method uses a logical judgment algorithm to get edge candidate images, and then edge pixels and their neighbor pixels compose the binary samples of the BP neural network.
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