Rocha, A. C. A.Silva, J. D.Alim, U. R.Carpendale, S.Sousa, M. C.2019-07-022019-07-022018-06-26Rocha, A., Silva, J. D., Alim, U. R., Carpendale, S., & Sousa, M. C. (2019). Decal-Lenses: Interactive Lenses on Surfaces for Multivariate Visualization. IEEE Transactions on Visualization and Computer Graphics, 25(8), 2568–2582. https://doi.org/10.1109/tvcg.2018.2850781http://hdl.handle.net/1880/110562https://doi.org/10.11575/PRISM/46127We present decal-lenses, a new interaction technique that extends the concept of magic lenses to augment and manage multivariate visualizations on arbitrary surfaces. Our object-space lenses follow the surface geometry and allow the user to change the point of view during data exploration while maintaining a spatial reference to positions where one or more lenses were placed. Each lens delimits specific regions of the surface where one or more attributes can be selected or combined. Similar to 2D lenses, the user interacts with our lenses in real-time, switching between different attributes within the lens context. The user can also visualize the surface data representations from the point of view of each lens by using local cameras. To place lenses on surfaces of intricate geometry, such as the human brain, we introduce the concept of support surfaces for designing interaction techniques. Support surfaces provide a way to place and interact with the lenses while avoiding holes and occluded regions during data exploration. We further extend decal-lenses to arbitrary regions using brushing and lassoing operations. We discuss the applicability of our technique and present several examples where our lenses can be useful to create a customized exploration of multivariate data on surfaces.enUnless otherwise indicated, this material is protected by copyright and has been made available with authorization from the copyright owner. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.“© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”CamerasCorrelationData visualizationDecalFocus+ContextGeometryInteractionLensesMultivariateSurfacesThree-dimensional displaysTwo dimensional displaysVisualizationjournal articlehttps://doi.org/10.1109/TVCG.2018.2850781