中文说明：利用BP神经网络进行图像分割。主要适用于RGB信息丰富的图像。以RGB为BP网络的三个输入，与对应的灰度图对网络进行训练。
English Description：
BP neural network is used for image segmentation. It is mainly suitable for RGB information rich images. Using RGB as the three inputs of BP network, the network is trained with the corresponding gray image.