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Item type:Publication, 3D Shape Matching for Retrieval and Recognition(Springer, 2020-01-01)Nowadays, multimedia information such as images and videos are present in many aspects of our lives. Three-dimensional information is also becoming important in different applications, for instance, entertainment, medicine, security, art, just to name a few. It is therefore necessary to study how to properly process 3D information taking advantage of the properties that it provides. This chapter gives an overview of 3D shape matching and its applications in shape retrieval and recognition. In order to present the subject, we opted for describing in detail four approaches with good balance among maturity and novelty, namely, the PANORAMA descriptor, spin images, functional maps, and Heat Kernel Signatures for retrieval. We also aim at stressing the importance of this field in areas such as computer vision and computer graphics, as well as the importance of addressing the main challenges on this research field.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, SHREC’20 Track: Retrieval of digital surfaces with similar geometric reliefs(Elsevier, 2020-10-01)This paper presents the methods that have participated in the SHREC’20 contest on retrieval of surface patches with similar geometric reliefs and the analysis of their performance over the benchmark created for this challenge. The goal of the context is to verify the possibility of retrieving 3D models only based on the reliefs that are present on their surface and to compare methods that are suitable for this task. This problem is related to many real world applications, such as the classification of cultural heritage goods or the analysis of different materials. To address this challenge, it is necessary to characterize the local ”geometric pattern” information, possibly forgetting model size and bending. Seven groups participated in this contest and twenty runs were submitted for evaluation. The performances of the methods reveal that good results are achieved with a number of techniques that use different approaches.