Estimating reflectance and shape of objects from a single cartoon-shaded image
| Autor: | Yasushi Yamaguchi, Hideki Todo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Computer science
relighting ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION 02 engineering and technology non-photorealistic rendering lcsh:QA75.5-76.95 GeneralLiterature_MISCELLANEOUS Computer graphics Artificial Intelligence 020204 information systems Computer graphics (images) 0202 electrical engineering electronic engineering information engineering Computer vision Quantization (image processing) ComputingMethodologies_COMPUTERGRAPHICS Gouraud shading Cel shading business.industry 020207 software engineering cartoon shading Computer Graphics and Computer-Aided Design Color quantization Non-photorealistic rendering quantization lcsh:Electronic computers. Computer science Computer Vision and Pattern Recognition Artificial intelligence Shading Blinn–Phong shading model business |
| Zdroj: | Computational Visual Media, Vol 3, Iss 1, Pp 21-31 (2017) |
| ISSN: | 2096-0662 2096-0433 |
| DOI: | 10.1007/s41095-016-0066-0 |
| Popis: | Although many photorealistic relighting methods provide a way to change the illumination of objects in a digital photograph, it is currently difficult to relight digital illustrations having a cartoon shading style. The main difference between photorealistic and cartoon shading styles is that cartoon shading is characterized by soft color quantization and nonlinear color variations that cause noticeable reconstruction errors under a physical reflectance assumption, such as Lambertian reflection. To handle this non-photorealistic shading property, we focus on shading analysis of the most fundamental cartoon shading technique. Based on the color map shading representation, we propose a simple method to determine the input shading as that of a smooth shape with a nonlinear reflectance property. We have conducted simple ground-truth evaluations to compare our results to those obtained by other approaches. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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