Authors
Toru Hiraoka*
Department of Information Systems, University of Nagasaki, 1-1-1 Manabino
Nagayo, Nishisonogi, Nagasaki 815-2195, Japan
*Email: [email protected]
Corresponding Author
Toru Hiraoka
Received 23 November 2019, Accepted 25 November 2019, Available Online
28 February 2020.
DOI
https://doi.org/10.2991/jrnal.k.200222.001
Keywords
Non-photorealistic rendering; ripple pattern; arbitrarily orientation;
circular-sector-type smoothing filter; inverse filter
Abstract
A Non-photorealistic rendering method for generating ripple images from
photographic images has been proposed using intensity gradient. Ripple
patterns imitate a wave on the water surface and are composed of continuous
lines with fluctuations. Ripple images are expressed by superimposing ripple
patterns on photographic images. However, the conventional method can only
generate vertical and horizontal ripple patterns. Therefore, in this paper,
we develop a method that can generate ripple patterns in any orientation.
Ripple images generated by the proposed method are called Arbitrarily-Oriented
Ripple (AOR) images. The proposed method is executed by an iterative process
using circular-sector-type smoothing filter and inverse filter. To verify
the effectiveness of our method, we investigate the changes in AOR images
by changing the values of the parameters.
Copyright
© 2020 The Authors. Published by ALife Robotics Corp. Ltd.
Open Access
This is an open access article distributed under the CC BY-NC 4.0 license
(http://creativecommons.org/licenses/by-nc/4.0/).