Sketch-based 3D shape retrieval has become an important research topic in content-based 3D object retrieval. To foster this research area, two Shape Retrieval Contest (SHREC) tracks on this topic have been organized by us in 2012 and 2013 based on a small-scale and large-scale benchmarks, respectively. Six and five (nine in total) distinct sketch-based 3D shape retrieval method have competed each other in these two contests, respectively. To measure and compare the performance of the top participating and other existing promising sketch-based 3D shape retrieval methods and solicit the state-of-the-art approaches, we perform a more comprehensive comparison of fifteen best (four top participating algorithms and eleven additional state-of-the-art methods) retrieval methods by completing the evaluation of each method on both benchmarks. The benchmarks, results, and evaluation tools for the two tracks are publicly available on our websites [1,2]
Abstract:Historical renders are exposed to several degradation processes that can lead to a wide range of anomalies, such as scaling, detachments and pulverization. Among the common anomalies, the loss of cohesion and adhesion are usually identified as the most difficult to repair; these anomalies still need to be deeply studied to reach compatible, durable and sustainable conservation treatments. The restitution of renders cohesion can be achieved using consolidating products. Nevertheless repair treatments could induce aesthetic alterations, and therefore are usually followed by chromatic reintegration. This work aims to study the effectiveness of mineral products as consolidants for limebased mortars and simultaneously as chromatic treatments for pigmented renders. The studied consolidating products are prepared by mixing air lime, metakaolin, water and mineral pigments. The idea of these consolidating and colouring products rises from a traditional lime-based technique, the lime-wash, widely diffused in Southern Europe and in the Mediterranean Area.Consolidating products were applied and tested on lime-based mortar specimens with a low binder-aggregate ratio and therefore with reduced cohesion. A physicomechanical, microstructural and mineralogical characterization was performed on untreated and treated specimens, in order to evaluate the efficacy and durability of the treatments. Accelerated ageing tests were also performed to assess consolidants durability, when subjected to aggressive conditions. Results showed that consolidants are compatible, effective and possess good durability. Powered by Edit orial Manager® and ProduXion Manager® from Aries Syst em s Corporat ion ABSTRACTHistorical renders are exposed to several degradation processes that can lead to a wide range of anomalies, such as scaling, detachments and pulverization. Among the common anomalies, the loss of cohesion and adhesion are usually identified as the most difficult to repair; these anomalies still need to be deeply studied to reach compatible, durable and sustainable conservation treatments. The restitution of renders cohesion can be achieved using consolidating products. Nevertheless repair treatments could induce aesthetic alterations, and therefore are usually followed by chromatic reintegration. This work aims to study the effectiveness of mineral products as consolidants for lime-based mortars and simultaneously as chromatic treatments for pigmented renders. The studied consolidating products are prepared by mixing air lime, metakaolin, water and mineral pigments. The idea of these consolidating and colouring products rises from a traditional limebased technique, the lime-wash, widely diffused in Southern Europe and in the Mediterranean Area.Consolidating products were applied and tested on lime-based mortar specimens with a low binder-aggregate ratio and therefore with reduced cohesion. A physico-mechanical, microstructural and mineralogical characterization was performed on untreated and treated specimens, in order to evaluate ...
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