Firstly, most saliency edges are extracted as input for subsequent contour grouping.Secondly, the symmetry measure as higher grouping cues which supervises the low level grouping process.

• 选取显著性重要的小波变换变换边缘作为编组候选数据集，利用格式塔规则中对称率和平行率作为全局线索指导编组过程。