Self-animating images: illusory motion using repeated asymmetric patterns

Authors:
Ming-Te Chi;Tong-Yee Lee;Yingge Qu;Tien-Tsin Wong
Affiliations:
National Cheng-Kung University, Taiwan;National Cheng-Kung University, Taiwan;The Chinese University of Hong Kong;The Chinese University of Hong Kong
Venue:
ACM SIGGRAPH 2008 papers
Year:
2008

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Abstract

Illusory motion in a still image is a fascinating research topic in the study of human motion perception. Physiologists and psychologists have attempted to understand this phenomenon by constructing simple, color repeated asymmetric patterns (RAP) and have found several useful rules to enhance the strength of illusory motion. Based on their knowledge, we propose a computational method to generate self-animating images. First, we present an optimized RAP placement on streamlines to generate illusory motion for a given static vector field. Next, a general coloring scheme for RAP is proposed to render streamlines. Furthermore, to enhance the strength of illusion and respect the shape of the region, a smooth vector field with opposite directional flow is automatically generated given an input image. Examples generated by our method are shown as evidence of the illusory effect and the potential applications for entertainment and design purposes.