ABSTRACT
In the poster, we propose a model to predict the mixture of water-color pigments using convolutional neural networks (CNN). With a watercolor dataset, we train our model to minimize the loss function of sRGB differences. In metric of color difference ΔELab, our model achieves 88.7 % of data that ΔELab < 5 on the test set, which means the difference can not easily be detected by human eye. In addition, an interesting phenomenon is found; Even if the reflectance curve of the predicted color is not as smooth as the ground truth curve, the RGB color is still close to the ground truth.
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- William Baxter, Jeremy Wendt, and Ming C Lin. 2004. IMPaSTo: a realistic, interactive model for paint. In Proc. of the 3rd international symposium on Non-photorealistic animation and rendering. ACM, 45--148. Google Scholar
Digital Library
- Mei-Yun Chen, Ci-Syuan Yang, and Ming Ouhyoung. 2018. A Smart Palette for Helping Novice Painters to Mix Physical Watercolor Pigments. In Proc. of EuroGraphics 2018, Posters,, Eakta Jain and Jirí Kosinka (Eds.). The Eurographics Association, April 2018.Google Scholar
- Per Edström. 2007. Examination of the revised Kubelka-Munk theory: considerations of modeling strategies. JOSA A 24, 2 (2007), 548--556.Google Scholar
Cross Ref
- Chet S Haase and Gary W Meyer. 1992. Modeling pigmented materials for realistic image synthesis. ACM Transactions on Graphics (TOG) 11, 4 (1992), 305--335. Google Scholar
Digital Library
- Kaiming He, Xiangyu Zhang, Shaoqing Ren, and Jian Sun. 2016. Deep residual learning for image recognition. In Proc. of the IEEE conference on computer vision and pattern recognition. 770--778.Google Scholar
Cross Ref
- Paul Kubelka. 1948. New contributions to the optics of intensely light-scattering materials. Part I. Josa 38, 5 (1948), 448--457.Google Scholar
Cross Ref
Index Terms
Perceptual-based CNN model for watercolor mixing prediction
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