Object Inflation for Artistic Augmentation in Images and Animations

Abstract

We propose a method to inflate object figures for artistic augmentation in images and animations. The basic idea of our method is first to approximate normals of object surfaces by interpolating normals assigned to vertices of triangles obtained by triangulating the object region, and then deform textures inside the object region by offsetting texture coordinates with amount determined by empirical functions applied to normals. The final appearance of inflated objects is suggested by both shading calculated by use of approximated normals and deformed textures over the object region. The experimental results demonstrate that our triangle based normal interpolation approach is able to better approximate the object surface than the previous object boundary based normal interpolation did, thus, the inflation process can be speeded up significantly due to reduction in number of iterations required for obtaining a smooth inflated surface.