2000 | Longin Jan Latecki and Rolf Lakämper and Ulrich Eckhardt
The paper discusses the MPEG-7 Core Experiment CE-Shape-1, which aimed to evaluate the performance of shape descriptors for non-rigid shapes with a single closed contour. The experiment compared six shape descriptors from three main categories: contour-based, image-based, and skeleton-based. The descriptors were tested in three parts: robustness to scaling and rotation, similarity-based retrieval, and robustness to non-rigid deformations. The results showed that all descriptors except DAG performed well in the first part, indicating robustness to scaling and rotation. In the main part, two descriptors, P298 and P320, significantly outperformed the others in similarity-based retrieval, likely due to their focus on the best possible correspondence of maximal convex/concave arcs in simplified contours. The paper concludes that cognitively motivated computations, such as those used by P298 and P320, are essential for effective shape comparison, while robustness to non-rigid deformations is also crucial.The paper discusses the MPEG-7 Core Experiment CE-Shape-1, which aimed to evaluate the performance of shape descriptors for non-rigid shapes with a single closed contour. The experiment compared six shape descriptors from three main categories: contour-based, image-based, and skeleton-based. The descriptors were tested in three parts: robustness to scaling and rotation, similarity-based retrieval, and robustness to non-rigid deformations. The results showed that all descriptors except DAG performed well in the first part, indicating robustness to scaling and rotation. In the main part, two descriptors, P298 and P320, significantly outperformed the others in similarity-based retrieval, likely due to their focus on the best possible correspondence of maximal convex/concave arcs in simplified contours. The paper concludes that cognitively motivated computations, such as those used by P298 and P320, are essential for effective shape comparison, while robustness to non-rigid deformations is also crucial.