The simulative experiment of dynamic image shows that the boundary of a hollow object can be well reached in the improved active contour model, and the model has a good anti-noise property.
对动态图像的仿真实验表明，改进后的主动轮廓线模型能很好地收敛到物体的凹陷边界，且具有良好的抗噪性。
2
By using this method, mixed noiseof 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。
3
The chain code was replaced by the shape signature and used to express the contour, improve the speed and decrease the effect ofnoise and transformation due to camera calibration.