We present a novel use of commodity graphics hardware to perform real-time image segmentation and image morphology operations. Our preliminary results show a performance increase of over 30% using an nVidia GeForce4 when compared to an implementation ...

Cylindrical panorama is being used in many applications. Cylindrical panoramic viewers render the panorama from the center of the cylinder by projecting the cylindrical map onto a planar screen. This process involves nonlinear image warping, so many ...

In this paper, we present several methods that can greatly improve image quality when using the shadow mapping algorithm. Shadow artifacts introduced by shadow mapping are mainly due to low resolution shadow maps and/or the limited numerical precision ...

We present a technique which uses existing OpenGL capabilities to approximate the effect of blurry specular reflections and indirect diffuse illumination. It makes use of environment maps, mipmapping with level of detail control, and possibly texture ...

Tone reproduction algorithms attempt to compress a large range of pixel values into a smaller range that is suitable for display on devices with limited dynamic range. A recently proposed tone reproduction operator achieved this goal by emulating ...

A set of uniformly distributed points on a hemisphere is generated using a popular method based on triangle subdivision. In computer graphics applications, each data point (for example, representing a direction from a point on a surface) is typically ...

This paper presents a novel high-precision algorithm for the calculation of the minimal distance between two circles in three dimensions. Contrary to the common approach that mainly utilizes a solution of an eighth-degree polynomial equation, the ...

In this paper we present an easy computation of a generalized form of barycentric coordinates for irregular, convex n-sided polygons. Triangular barycentric coordinates have had many classical applications in computer graphics, from texture mapping to ...

The standard technique for making images viewed at daytime lighting levels look like images of night scenes is to use a low overall contrast, low overall brightnesses, desaturation, and to give the image a "blue shift." This paper introduces two other ...

A tunable blob function is proposed which is computationally simple since it is a rational function of low degree. The blob function is dependent on a parameter d which can be used to control the blob function making it suitable for computer graphics ...

We present a new algorithm that uses the JPEG compression format and provides a significant improvement in contour extraction for medical imaging, suc as X-ray photos. The algorithm searches for an object's contour in the compressed file. The complexity ...

Convolution surfaces generalize point-based implicit surfaces to incorporate higher-dimensional skeletal elements; line segments can be considered the most fundamental skeletal elements since they can approximate curve skeletons. Existing analytical ...

This paper presents a very simple implementation of a fluid solver. The implementation is consistent with the equations of fluid flow and produces velocity fields that contain incompressible rotational structures and dynamically react to user-supplied ...

We describe a simple and fast method of creating and using joint sinus reach cones to limit the range of motion on universal and ball-and-socket joints. Reach cones can be created interactively or based on results from biomechanics. A reach cone is ...

Nonuniform rational B-splines (NURBS) are a powerful tool to model deformable objects. Their shapes can be easily modified by moving the control points. A common method used to render these objects is polygonization. However, the polygonization process ...

We show how to easily create a right-handed orthonormal basis, given a unit vector, in 2-, 3-, and 4-space.

In this paper, we present a new approach for collision detection of volumetric objects. Good speeds and accuracy can be achieved using existing graphics hardware. The algorithm is simple to implement and, unlike other collision detection mechanisms, ...