Sketch-based 3D model retrieval using diffusion tensor fields of suggestive contours

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Multi-view Convolutional Neural Networks for 3D Shape Recognition (2015, background): “However, it is hard to convey stylistic and geometric variations using only textual descriptions, thus sketchbased shape retrieval [38, 31, 12] has been proposed as an alternative for users to retrieve shapes with an approximate sketch of the desired 3D shape in mind.”
Sketch-based shape retrieval (2012, methodology): “Instead, sketch-based retrieval has been proposed [Löffler 2000; Funkhouser et al. 2003; Chen et al. 2003; Yoon et al. 2010; Shao et al. 2011], where users sketch the desired model as seen from one or more viewpoints.”