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Full-Text Articles in Physical Sciences and Mathematics
Constraint-Based Interpolation, Daniel David Goggins
Constraint-Based Interpolation, Daniel David Goggins
Theses and Dissertations
Image reconstruction is the process of converting a sampled image into a continuous one prior to transformation and resampling. This reconstruction can be more accurate if two things are known: the process by which the sampled image was obtained and the general characteristics of the original image. We present a new reconstruction algorithm known as Constraint-Based Interpolation, which estimates the sampling functions found in cameras and analyzes properties of real world images in order to produce quality real-world image magnifications. To accomplish this, Constraint-Based Interpolation uses a sensor model that pushes the pixels in an interpolation to more closely match …
Accelerated Ray Traced Animations Exploiting Temporal Coherence, Darwin Tarry Baines
Accelerated Ray Traced Animations Exploiting Temporal Coherence, Darwin Tarry Baines
Theses and Dissertations
Ray tracing is a well-know technique for producing realistic graphics. However, the time necessary to generate images is unacceptably long. When producing the many frames that are necessary for animations, the time is magnified. Many methods have been proposed to reduce the calculations necessary in ray tracing. Much of the effort has attempted to reduce the number of rays cast or to reduce the number of intersection calculations. Both of these techniques exploit spatial coherence. These acceleration techniques are expanded not only to exploit spatial coherence but also to exploit temporal coherence in order to reduce calculations by treating animation …