Hideki Todo

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Recent progress in non-photorealistic rendering (NPR) has led to many stylized shading techniques that efficiently convey visual information about the objects depicted. Another crucial goal of NPR is to give artists simple and direct ways to express the abstract ideas born of their imaginations. In particular, the ability to add intentional, but often(More)
The Lit-Sphere model proposed by Sloan et al. (Proceedings of Graphics Interface 2001, pp. 143–150, 2001) is a method for emulating expressive artistic shading styles for 3D scenes. Assuming that artistic shading styles are described by view space normals, this model produces a variety of stylized shading scenes beyond traditional 3D lighting control.(More)
Existing texture projection methods are capable to produce irregular gradation shading, but still can not provide region control for acquiring artistic styles such as multiple lights effects and more detailed shading by painting. We improved the capability of light space normal notion from [Todo et al. 2013] by adjusting the <i>z</i> component so that(More)
We propose a hybrid blendshape manipulation framework to accelerate the face posing process. The hybrid framework enables interactive edits with direct manipulation and face-constraint-relaxation, which also avoid face geometry distortion during operations. An underlying primitive in this framework is a constraint blendshape model, which operates indirectly(More)
Realistic image synthesis is an important research goal in computer graphics. One important factor to achieve this goal is a bidirectional reflectance distribution function (BRDF) that mainly governs an appearance of an object. Many BRDF models have therefore been developed. A physically-based BRDF based on microfacet theory [Cook and Torrance 1982] is(More)
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(More)
classroom use is granted without fee provided that copies are not made or distributed for commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honored. For all other uses, contact the Owner/Author. Figure 1. (a)-(c)View-dependent highlights with the view(More)