The algorithm begins with pre-segmentation at a low resolution level and transmits the result to optimally segmentalize on a higher resolution scale.

• 在粗尺度上采用基于区域的高斯噪声模型分析图像，并和测地线模型相结合实现预分割，预分割结果表明了组合模型能自动和精确地提取边界。