本发明说明了一种基于L1距离测量之适应性局部影像类似性测量方法。将各距离测量间之一关系用来估计各种区块大小之适当的临界値。对区块大小之选择系取决于影像中所含的劣化、以及应用。使用各种区块大小的L1距离之分布而创建该等类似性测量间之关系。针对较大的劣化而采用具有较大的区块大小之类似性测量。对于较小的瑕疵而言,较小的区块大小将产生可接受的结果。为了保持计算负担的可管理性,采用可提供所需影像品质的最小区块大小。

A method of adaptive local image similarity measurement based on the L1 distance measure is described. A relationship between distance measures is used to estimate appropriate thresholds for various patch sizes. The choice of patch size depends on the degradations contained in the image and the application. The relation between the similarity measures is established using the distribution of L1 distances for various patch sizes. For larger degradations, similarity measure with a bigger patch size is employed. For lesser imperfections, a smaller patch size produces acceptable results. To keep the computational overhead manageable, the smallest patch size that gives the desired image quality is employed.