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Article

Gaussian Curvature Entropy for Curved Surface Shape Generation

1
School of Integrated Design Engineering, Graduate School of Keio University, Yokohama 223-8522, Japan
2
Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan
*
Author to whom correspondence should be addressed.
Entropy 2020, 22(3), 353; https://doi.org/10.3390/e22030353
Received: 31 January 2020 / Revised: 15 March 2020 / Accepted: 16 March 2020 / Published: 18 March 2020
(This article belongs to the Special Issue Intelligent Tools and Applications in Engineering and Mathematics)
The overall shape features that emerge from combinations of shape elements, such as “complexity” and “order”, are important in designing shapes of industrial products. However, controlling the features of shapes is difficult and depends on the experience and intuition of designers. Among these features, “complexity” is said to have an influence on the “beauty” and “preference” of shapes. This research proposed a Gaussian curvature entropy as a “complexity” index of a curved surface shape. The proposed index is calculated based on Gaussian curvature, which is obtained by the sampling and quantization of a curved surface shape and validated by the sensory evaluation experiment while using two types of sample shapes. The result indicates the correspondence of the index to perceived “complexity” (the determination coefficient is greater than 0.8). Additionally, this research constructed a shape generation method that was based on the index as a car design supporting apparatus, in which the designers can refer many shapes generated by controlling “complexity”. The applicability of the proposed method was confirmed by the experiment while using the generated shapes. View Full-Text
Keywords: complexity; entropy; gaussian curvature; generative design complexity; entropy; gaussian curvature; generative design
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MDPI and ACS Style

Okano, A.; Matsumoto, T.; Kato, T. Gaussian Curvature Entropy for Curved Surface Shape Generation. Entropy 2020, 22, 353. https://doi.org/10.3390/e22030353

AMA Style

Okano A, Matsumoto T, Kato T. Gaussian Curvature Entropy for Curved Surface Shape Generation. Entropy. 2020; 22(3):353. https://doi.org/10.3390/e22030353

Chicago/Turabian Style

Okano, Akihiro, Taishi Matsumoto, and Takeo Kato. 2020. "Gaussian Curvature Entropy for Curved Surface Shape Generation" Entropy 22, no. 3: 353. https://doi.org/10.3390/e22030353

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