Shadow generation has been subject to serious investigation in computer graphics, and many clever algorithms have been suggested. However, previous algorithms cannot render high quality soft shadows onto arbitrary, animated objects in real time. Pursuing this goal, we present a new soft shadow algorithm that extends the standard shadow volume algorithm by replacing each shadow quadrilateral wit...

Shadow generation has been subject to serious investigation in computer graphics, and many clever algorithms have been suggested. However, previous algorithms cannot render high quality soft shadows onto arbitrary, animated objects in real time. Pursuing this goal, we present a new soft shadow algorithm that extends the standard shadow volume algorithm by replacing each shadow quadrilateral wit...

Shadow mapping is perhaps the most pervasive method for creating convincing shadows in computer graphics. However, because it is an image-space algorithm it must contend with aliasing issues caused by finite and discrete sampling. This exposition differs from previous work on shadow maps in that it pinpoints the one remaining degree of freedom in the shadow mapping process – the angle of the fi...

Flash/noflash pairs have been studied as a simple mechanism for supplying less-noisy information for dark areas of an ambient-light image. This research direction also includes image pairs or sequences of nighttime or obscured imagery such as surveillance video. Ambient imagery has some advantages over flash images, in general, in that a flash can create harsh or unpleasing effects, and can als...

Appearance-based approaches have the advantage of representing the variability of an object’s appearance due to illumination change without explicit shape modeling. While a substantial amount of research has been performed on the representation of object’s diffuse and specular shading, little attention has been paid to cast shadows which are critical for attaining realism when multiple objects ...

Execution Shadow processing was motivated, in part, by a tool called AE that supports abstract execution [17]. AE is used for efficient generation of detailed program traces. A source program, in C, is instrumented to record a small set of key events during execution. After execution these events serve as input to an abstract version of the original program that can recreate a full trace of the...

In this paper we present a method for illuminating a dynamic scene with a high dynamic range environment map with real-time or interactive frame rates, taking into account self shadowing. Current techniques require static geometry (pre-computed light transport), are limited to few and small area lights or are limited in the frequency of the shadows. We facilitate importance sampling of the envi...

Recently, projector camera systems have been used actively for image synthesis and for 3D reconstruction. For using the projector camera systems in these applications, it is very important to compute the geometry between projectors and cameras accurately. Recently, it has been shown that by using the mutual projection of cameras, multiple cameras are calibrated quite accurately. However, this p...