Sung-Ye Kim

Layered-depth image using pixel grouping

Recent advance in computer hardware and Internet technology makes more realistic images affordable on our computer systems. However, the image creation by using conventional geometry modelling have limitations in terms of rendering time and image quality to be used in interactive rendering applications. Image-based rendering (IBR) technique is a good solution to reducing those limitations in such applications. As an improvement on the well-known layered-depth image (LDI) method, we propose a way of pixel grouping from depth images and making image generation efficient by utilizing the information obtained from the grouping.

High dynamic range image texture mapping based on VRML

In this paper, we describe a technique for representing and displaying high dynamic range image (HDRI) as a texture map in VRML structure. To do this, we designed and implemented extended texture nodes for supporting HDRI in VRML and developed HDRI-based mapping tool that can be used for authoring objects with HDR image as a texture data. Even though the authoring result of our tool is not identical with standard VRML format exactly, it is good enough to be used in virtual world. To verify this, we developed an extended VRML browser that supports a parsing and viewing of our new texture nodes related to HDRI and allows the exposure to be adjusted continuously and arbitrarily at the time of navigation.