By using this method, mixed noise of ct image can be denoised and contour information of vertebra of ct image can be protected very well.
该方法在去除CT图像中混合噪声的同时能很好的保护图像的轮廓信息。
It calculates the gradient information of an input image as the reference image, which reduces the most inner details of the reference image but emphases its contour information.
计算输入图像的梯度值，减少了图像的内在信息而使轮廓更为清晰。
The directional chain code is used to record the contour information data according to the trend of the contour, and this will be very convenient for the smoothing process later on.
采用方向链码记录轮廓信息，它依据轮廓走向的顺序来记录数据，这对以后的光顺处理工作将是十分方便的。
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