Home | Amazing | Today | Tags | Publishers | Years | Account | Search 
Light Field Sampling (Synthesis Lectures on Image, Video, and Multimedia Processing)

Buy
Light field is one of the most representative image-based rendering techniques that generate novel virtual views from images instead of 3D models. The light field capture and rendering process can be considered as a procedure of sampling the light rays in the space and interpolating those in novel views. As a result, light field can be studied as a high-dimensional signal sampling problem, which has attracted a lot of research interest and become a convergence point between computer graphics and signal processing, and even computer vision. This lecture focuses on answering two questions regarding light field sampling, namely how many images are needed for a light field, and if such number is limited, where we should capture them. The book can be divided into three parts. First, we give a complete analysis on uniform sampling of IBR data. By introducing the surface plenoptic function, we are able to analyze the Fourier spectrum of non-Lambertian and occluded scenes. Given the spectrum, we also apply the generalized sampling theorem on the IBR data, which results in better rendering quality than rectangular sampling for complex scenes. Such uniform sampling analysis provides general guidelines on how the images in IBR should be taken. For instance, it shows that non-Lambertian and occluded scenes often require a higher sampling rate. Next, we describe a very general sampling framework named freeform sampling. Freeform sampling handles three kinds of problems: sample reduction, minimum sampling rate to meet an error requirement, and minimization of reconstruction error given a fixed number of samples. When the to-be-reconstructed function values are unknown, freeform sampling becomes active sampling. Algorithms of active sampling are developed for light field and show better results than the traditional uniform sampling approach. Third, we present a self-reconfigurable camera array that we developed, which features a very efficient algorithm for real-time rendering and the ability of automatically reconfiguring the cameras to improve the rendering quality. Both are based on active sampling. Our camera array is able to render dynamic scenes interactively at high quality. To the best of our knowledge, it is the first camera array that can reconfigure the camera positions automatically.
(HTML tags aren't allowed.)

Visual Language for Designers: Principles for Creating Graphics that People Understand
Visual Language for Designers: Principles for Creating Graphics that People Understand

Within every picture is a hidden language that conveys a message, whether it is intended or not. This language is based on the ways people perceive and process visual information. By understanding visual language as the interface between a graphic and a viewer, designers and illustrators can learn to inform with accuracy and...

Fundamental Concepts in Computer Science (Advances in Computer Science and Engineering: Texts)
Fundamental Concepts in Computer Science (Advances in Computer Science and Engineering: Texts)

Computer Science, or Informatics as it is often called in Europe, is viewed by many as being both a science and a technology. Clearly, its technological aspects are very much upon us on a day to day basis. Yet all other exact  sciences such as physics, biology or chemistry are also very present in ourdaily lives through the technologies...

How Does a Spacecraft Reach the Moon? (Science in the Real World)
How Does a Spacecraft Reach the Moon? (Science in the Real World)

The Moon is very far from Earth. Yet, scientists have been able to get satellites, shuttles, and other spacecraft into space and a few manned spacecraft to land on the Moon. "How Does a Spacecraft Reach the Moon?" reveals the science behind propulsion and the energy it takes to get large craft into space. Colorful photographs and...


Optimization Algorithms for Networks and Graphs
Optimization Algorithms for Networks and Graphs
A revised and expanded advanced-undergraduate/graduate text (first ed., 1978) about optimization algorithms for problems that can be formulated on graphs and networks. This edition provides many new applications and algorithms while maintaining the classic foundations on which contemporary algorithm...
Health Science Experiments (Experiments for Future Scientists)
Health Science Experiments (Experiments for Future Scientists)

From choosing healthy food to taking care of one's teeth, and from exploring the ways infection is spread to studying nerves, the health science field is a broad category of study. This book presents activities about health science issues to encourage students to make lifelong, healthy choices.

...
Towards Hardware-Intrinsic Security: Foundations and Practice (Information Security and Cryptography)
Towards Hardware-Intrinsic Security: Foundations and Practice (Information Security and Cryptography)

Hardware-intrinsic security is a young field dealing with secure secret key storage. By generating the secret keys from the intrinsic properties of the silicon, e.g., from intrinsic Physical Unclonable Functions (PUFs), no permanent secret key storage is required anymore, and the key is only present in the device for a minimal amount of time....

©2019 LearnIT (support@pdfchm.net) - Privacy Policy