Applications like rendering of images using computer graphics methods are usually requiring more sophisticated light models to give better control. Complex scenes in computer generated images are requiring very differentiated light models to give a realistic rendering of the scene. That usually includes a high number of (virtual) light sources to model a scene to reproduce accurate shadows and ...

This article presents a methodology for reconstruction of 3D faces which is based on stereoscopic images of the scene using active and passive surface reconstruction. A sequence of gray patterns is generated, which are projected onto the scene and their projection recorded by a pair of stereo cameras. The images are rectified to make coincident their epipolar planes and so to generate a stereo ...

In order to solve the conflict between the size constraints of mobile phone cameras and image quality, it is an effective approach to improve the light sensitivity of imaging sensors. A color filter array comprising sparsely distributed crosses of color sampling blocks is proposed, in which nearly 69% of elements are transparent ones that detect luminance directly with a higher sensitivity than...

This paper presents a measurement method suitable for investigating the timing properties of cameras. A single light source illuminates the camera detector starting with a varying defined delay after the camera trigger. Pixels from the recorded camera frames are summed up and normalised, and the resulting function is indicative of the overlap between illumination and exposure. This allows to in...

A photograph taken by a conventional camera captures the average intensity of light at each pixel, discarding information about the angle from which that light approached. Light field cameras retain angular information about the rays they collect, allowing re-integration of rays during post processing. Consumer light field cameras have small apertures, and laboratory camera arrays with large ba...

Light fields —4D representations of a scene coding luminance as a function of both position and angle— are becoming increasingly easy to capture. A number of handheld light field cameras, such as those by Lytro, Raytrix, or Pelican Imaging, have already entered the consumer market and are bringing light field photography to the wide public. This gives rise to a new need: Interfaces and tools fo...

Although capturing and displaying stereo 3D content is now commonplace, information-rich light-field video content capture, transmission and display are much more challenging, resulting in at least one order of magnitude increase in complexity even in the simplest cases. We present an end-to-end system capable of capturing and real-time displaying of high-quality light-field video content on va...

We demonstrate a generalizable method for unified multitouch detection and response on various nonparametric and parametric surfaces to support interactive physical–virtual experiences. The method employs multiple infrared (IR) cameras, one or more projectors, IR light sources, and a rear-projection surface. IR light reflected off human fingers is captured by cameras with matched IR pass filter...