Tensor based non-photo realistic rendering for Korean architectural images

Abstract

Existing pen and ink sketch technologies can be applied to general images, but they could not produce optimal output for images of traditional architecture, because most images consist of exquisite straight lined patterns in traditional architecture, such as root tiles and window bars. The lines of roofs and eaves need to be described delicately to express pen and ink sketch most effectively. Therefore, by proposing a method to create white noise for light and shade of input images, to extract input vector directions from the white noise, and to determine the direction and length of stroke, a new expression technique is proposed for pen and ink sketch that could best reflect the characteristics of traditional architecture.

Keywords

non-photo realistic rendering / pen and ink sketch / tensor

References

[1] HaeberliP. Paint by numbers: Abstract image representation [C]. Proceedings of SIGGRAPH 90, 1990, New York, ACM: 207-214

[2] SousaM C, BuchananJ W. Computer-generated grapite pencil rendering of 3D polygonal models [J]. Computer Graphics Forum, 1999, 18(3): 195-208

[3] LitsinowiczP. Processing images and video for an impressionist effect [C]. SIGGRAPH’97 Proceeding, 1998, Los Angeles, ACM: 453-360

[4] MaoX-y, YoshiyasuN, AtsumiI. Automatic generation of pencil drawing from 2D images using line integral convolution [C]. Proceeding of the 7th International Conference on Computer Aided Design and Computer Graphics CAD/GRAPHICS2001, 2001, Beijing, International Academic Publishers: 240-248

[5] MaJ Y, YongH S, YoonK H. Conference pencil hatching effect using sharpening and blurring spatial filter [J]. Korea Computer Graphics Society, 2004, 11(1): 8-12

[6] SalisburyM P, WongM T, HughesJ F, SalesinD A. Orientable textures for image-based Pen-And-Ink illustration [C]. Proceedings of SIGGRAPH97, 1997, Los Angeles, ACM: 401-406

[7] PraunE, HoppeH, WebbMA, FinkelsteinA. Real-time hatching [J]. Proceedings of SIGGRAPH 2001, 2001, Los Angeles, ACM: 579-584

[8] FungJ, VeryovkaO. Pen and ink textures for real-time rendering [C]. Proceedings of Graphics Interface, 2003, Halifax, ACM: 131-138

[9] EugeneZ, HarryY, ZhongzangL, RobertL. Asymmetric tensor analysis for flow visualization [J]. IEEE Transactions on Visualization and Computer Graphics, 2009, 15(1): 106-122