This work should give an overview of various shadow techniques used in real-time rendering. Proper shadows are a crucial part of realistic looking scenes and therefore a huge research field in computer graphics. We will focus on the two major shadowing techniques shadow volumes and shadow mapping, including most popular rendering approaches, whereby the most practical approaches should be point...

We collected high resolution observations of nonlinear internal waves (NLIWs) at a persistent upwelling front in the shallow coastal environment ( ~ 20m) of northern Monterey Bay, CA. The coastal upwelling front forms between recently upwelled waters and warmer stratified waters that are trapped in the bay (upwelling shadow). The front propagates up and down the coast in the along shore directi...

j ourna l homepage: www.e lsev ie r.com/ locate / rse Aku Riihelä, Vesa Laine, Terhikki Manninen, Timo Palo, and Timo Vihma. 2010. Validation of the Climate-SAF surface broadband albedo product: Comparisons with in situ observations over Greenland and the ice-covered Arctic Ocean. Remote Sensing of Environment, volume 114, number 11, pages 2779-2790. doi:10.1016/j.rse.2010.06.014. © 2010 Elsevi...

Support was provided by National Institute on Drug Abuse Grant RO1 DA08237 to Jacques P. Barber. We thank Ilana Krakauer, Veronica Rice, and Carol Foltz for their help with data analysis of previous versions of this study. Correspondence concerning this article should be addressed to Jacques P. Barber, Suite 648, 3535 Market Street, Philadelphia, PA 19104–3309. E-mail: [email protected]....

Shadows are physical phenomena observed in most natural scenes. They can cause many problems in computer vision performance. The paper addresses the problem of shadow detection and removal from solo image of natural scenes. Our method is based on Retinex theory which is an image enhancement and illumination compensation model of the lightness and color perception of human vision. The approach p...

This paper presents a method that combines shadow detection and a 3D box model including shadow simulation, for estimation of size and position of vehicles. We define a similarity measure between a simulated image of a 3D box, including the box shadow, and a captured image that is classified into background/foreground/shadow. The similarity measure is used in an optimization procedure to find t...

We propose a novel shadow texture generation method with linear processing time using a shadow depth buffer (SZ-Buffer). We also present a method that achieves further speedup using temporal coherence. If the transition between dynamic and static state is not frequent, depth values of static objects does not vary significantly. So we can reuse the depth value for static objects and render only ...

We propose a new touch screen interaction named as Touch Shadow, which is based on the contact area and the resultant shape of the fingertip when it touches the touch surface. The results of our feasibility evaluation established three degrees of freedom for the Touch Shadow interaction based on three fundamental parameters, the touch surface area, displacement of the touch centroid and directi...