In this paper, we present an analysis technique that leverages the complexity found in detailed 3D models for illustrative shading purposes. Given a smooth base surface with relief, it locates relief features (concavities, convexities and inflections) around each surface point and at multiple scales, using cubic-polynomial fitting. This object-space, per-vertex information is then used to guide...

This paper describes a new architecture for generat­ ing smoothly shaded two dimensional images of volume data. This architecture fits into an image synthesis pipeline and uses only simple arithmetic operations and a look-up table to generate two dimensional images in real time. The shading algorithm is an extensioll of the grey-level gradient algorithm for shading volume data. The shading tech...

Shading is a fundamental technique for conveying three dimensional form in two dimensions . Shading can also be used, however, to emphasize the relative importance of different elements in a scene, to establish the visible priority of overlapping regions, and to indicate three dimensionality symbolically by gradations of tone. In animation, shading adds a graphic dimension to twodimensional obj...

In this project a simulation and model for a solar tower power plant are made. The model describes the calculation of the solar position, cosine effects, atmospheric attenuation between heliostat and receiver, heliostat reflectivity and shading and blocking. The model has been done taking into account also a discretization of the surface of the heliostats. This discretization was used to find o...

Intrinsic images such as albedo and shading are valuable for later stages of visual processing. Previous methods for extracting albedo and shading use either single images or images together with depth data. Instead, we define intrinsic video estimation as the problem of extracting temporally coherent albedo and shading from video alone. Our approach exploits the assumption that albedo is const...

In this paper, we introduce a new framework for the illustrative visualization of medical surface data. In most visualization frameworks, only light intensity is used to determine the surface shading. The analysis of medical textbooks reveals more complex shading approaches. The parameters of these approaches are mapped to different Shading Maps, which may be weighted and flexibly combined. We ...

Most of the existing works view the shapefrom-shading problem as equivalent to a non-linear first-order partial differential equation in surface elevation. Recently, there is a new approach to this problem, namely the shape-from-shading using the heat equation. This paper reviews several works either using the first or the second approach. The previous approach is also implemented in solving th...

We analyze noncontractible investments in a model with shading. A seller can make an investment that affects a buyer’s value. The parties have outside options that depend on asset ownership. When shading is not possible and there is no contract renegotiation, an optimum can be achieved by giving the seller the right to make a take-it-or-leave-it offer. However, with shading, such a contract cre...

This paper describes a new architecture for generating smoothly shaded two dimensional images of volume data. This architecture ts into an image synthesis pipeline and uses only simple arithmetic operations and a look-up table to generate two dimensional images in real time. The shading algorithm is an extension of the grey-level gradient algorithm for shading volume data. The shading technique...

Although fabrics are widely used as shading devices, reliable simulation models are rather rare and therefore the choice of a fabric with appropriate material characteristics is difficult. This paper presents a simulation model, which can be applied to most of the common available fabric shading materials. Furthermore a comprehensive simulation study has been conducted in order to derive simple...