Reconstructing a three-dimensional scene from multiple simultaneously acquired perspectives (the light field) is an elegant scanless imaging concept that can exceed the temporal resolution of currently available scanning-based imaging methods for capturing fast cellular processes. We tested the performance of commercially available light field cameras on a fluorescent microscopy setup for monit...

Light-field imaging systems have received a lot of attention recently, especially with the release of Lytro cameras for consumer application. Extensive research has been conducted in optimizing and developing applications for light-field images [1,2]. To investigate the potential use of light-field imaging systems as an experimental analysis tool, an automated image processing algorithm was dev...

Plenoptic cameras are intended to fully capture the light rays in a scene. Using this information, optical elements can be applied to a scene computationally rather than physically—allowing an infinite variety of pictures to be rendered after the fact from the same plenoptic data. Practical plenoptic cameras necessarily capture discrete samples of the plenoptic function, which together with the...

Remote detection by camera offers a versatile means for recording people activities. Relying principally on changes in video images, the method tends to fail in presence of shadows and illumination changes. This paper explores a possible remedy to these problems by using range cameras instead of conventional video cameras. As range is an intrinsic measure of object geometry, it is basically not...

This paper presents a theory that encompasses both “plenoptic” (microlens based) and “heterodyning” (mask based) cameras in a single frequency-domain mathematical formalism. Light-field capture has traditionally been analyzed using spatio-angular representation, with the exception of the frequency-domain “heterodyning” work. In this paper we interpret “heterodyning” as a general theory of multi...

In this paper a tracking approach designed to utilize multiple cameras with optional depth information, e.g., ToF cameras, structured light cameras and stereo or multi camera setups, is discussed which combines photometric tracking with volumetric tracking. It is able to work with any number and type of cameras. In order to achieve this objective the tracked object is modeled in 3D with an elli...

Although depth cameras play a huge role as a affordable device to scan 3D spaces, the precision of the device does not match other conventional cameras with color sensors. Considering their sophisticated nature, it is impossible to not vindicate depth cameras from this blame. However, the demand from the relevant fields is strong, including augmented reality which I am mostly concerned of. Thou...

In the human visual system, the projective relationship between the images seen in each eye with each other changes with their motion as the viewer attends to different points in space. The active vision heads built for many humanoid robots approximate human gaze behavior and share this property. Knowledge of this projective relationship is used in stereo vision tasks and is captured entirely b...