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Sensors 2017, 17(3), 572; doi:10.3390/s17030572

Ubiquitous Creation of Bas-Relief Surfaces with Depth-of-Field Effects Using Smartphones

School of Computer Science and Engineering, Chung-Ang University, Seoul 06974, Korea
Academic Editors: Sungrae Cho, Takeo Fujii and Joon-Sang Park
Received: 4 January 2017 / Revised: 7 March 2017 / Accepted: 9 March 2017 / Published: 11 March 2017
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Abstract

This paper describes a new method to automatically generate digital bas-reliefs with depth-of-field effects from general scenes. Most previous methods for bas-relief generation take input in the form of 3D models. However, obtaining 3D models of real scenes or objects is often difficult, inaccurate, and time-consuming. From this motivation, we developed a method that takes as input a set of photographs that can be quickly and ubiquitously captured by ordinary smartphone cameras. A depth map is computed from the input photographs. The value range of the depth map is compressed and used as a base map representing the overall shape of the bas-relief. However, the resulting base map contains little information on details of the scene. Thus, we construct a detail map using pixel values of the input image to express the details. The base and detail maps are blended to generate a new depth map that reflects both overall depth and scene detail information. This map is selectively blurred to simulate the depth-of-field effects. The final depth map is converted to a bas-relief surface mesh. Experimental results show that our method generates a realistic bas-relief surface of general scenes with no expensive manual processing. View Full-Text
Keywords: smartphone application; computer graphics; ubiquitous computing smartphone application; computer graphics; ubiquitous computing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Sohn, B.-S. Ubiquitous Creation of Bas-Relief Surfaces with Depth-of-Field Effects Using Smartphones. Sensors 2017, 17, 572.

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