Sketch-based warping of RGBN images

While current image deformation methods are careful in making the new geometry seem right, little attention has been given to the photometric aspects. We introduce a deformation method that results in coherently illuminated objects. For this task, we use RGBN images to support a relighting step inte...

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Bibliographic Details
Published in:Graphical models 2011-07, Vol.73 (4), p.97-110
Main Authors: Pereira, Thiago, Brazil, Emilio Vital, Macêdo, Ives, Sousa, Mario Costa, de Figueiredo, Luiz Henrique, Velho, Luiz
Format: Article
Language:English
Subjects:
Applied sciences
Artificial intelligence
Computer science
control theory
systems
Computer systems and distributed systems. User interface
Deformation
Exact sciences and technology
Hermite–Birkhoff radial basis functions
Image deformations
Interpolation
Mathematical models
Pattern recognition. Digital image processing. Computational geometry
RGBN Images
Sketch-based Interfaces
Sketches
Software
Tasks
Warpage
Warping
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Summary:While current image deformation methods are careful in making the new geometry seem right, little attention has been given to the photometric aspects. We introduce a deformation method that results in coherently illuminated objects. For this task, we use RGBN images to support a relighting step integrated in a sketch-based deformation method. We warp not only colors but also normals. Normal warping requires smooth warping fields. We use sketches to specify sparse warping samples and impose additional constraints for region of interest control. To satisfy these new constraints, we present a novel image warping method based on Hermite–Birkhoff interpolation with radial basis functions that results in a smooth warping field. We also use sketches to help the system identify both lighting conditions and material from single images. We present results with RGBN images from different sources, including photometric stereo, synthetic images, and photographs.
ISSN:1524-0703
1524-0711
DOI:10.1016/j.gmod.2010.11.001