title: RTcams: a new perspective on nonphotorealistic rendering from photographs.
abstract: Abstract-We introduce a simple but versatile camera model that we call the Rational Tensor Camera (RTcam). RTcams are well principled mathematically and provably subsume several important contemporary camera models in both computer graphics and vision; their generality is one contribution. They can be used alone or compounded to produce more complicated visual effects. In this paper, we apply RTcams to generate synthetic artwork with novel perspective effects from real photographs. Existing Nonphotorealistic Rendering from Photographs (NPRP) is constrained to the projection inherent in the source photograph, which is most often linear. RTcams lift this restriction and so contribute to NPRP via multiperspective projection. This paper describes RTcams, compares them to contemporary alternatives, and discusses how to control them in practice. Illustrative examples are provided throughout.
authors.affiliation: Media Technology Research Centre, Department of Computer Science, University of Bath, UK pmh@cs.bath.ac.uk
authors.forename: Peter M
authors.initials: PM
authors.lastname: Hall
authors.forename: John P
authors.initials: JP
authors.lastname: Collomosse
authors.forename: Yi-Zhe
authors.initials: YZ
authors.lastname: Song
authors.forename: Peiyi
authors.initials: P
authors.lastname: Shen
authors.forename: Chuan
authors.initials: C
authors.lastname: Li
mesh_terms: D000465:Algorithms; D003196:Computer Graphics; D003198:Computer Simulation; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D016247:Information Storage and Retrieval / Q000379:methods; D008962:Models, Theoretical; D009716:Numerical Analysis, Computer-Assisted; D010781:Photography / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D013382:Subtraction Technique