Due to the huge gap between computer and human in abilities to understand image contents, recently, user-assisted interactive image segmentation has been extensively studied and widely applied in various fields related to digital image processing. 由于计算机对于图像内容的理解存在很大的局限性,近年来,加入用户指导的交互式图像分割被深入研究,并在与数字图像处理相关的诸多领域获得了广泛的应用。