GEE Estimators in Mixture Model with Varying Concentrations

We discuss semiparametric mixture model where some components are parametrized with common Euclidean parameter and others are fully unknown. We introduce GEE approach and adaptive GEE-based approach for parameter estimation. Proposed estimators are tested on simulated sample

Optimized 3D Scene Rendering on Projection-Based 3D Displays

We address the problem of 3D scene rendering on projection-based light field displays and optimizing the input display images to obtain the best possible visual output. We discuss a display model comprising a set of projectors, an anisotropic diffuser and a viewing manifold. Based on this model, we render an initial set of projector images to be further optimized for the best perception at a specified set of viewing positions. We propose a least squares method, which minimizes the channel-wise color difference between the generated images for different viewer positions, and their ground-true counterparts. We formulate a constrained optimization problem and solve it iteratively by the descent method.acceptedVersionPeer reviewe

A Framework for Assessing Rendering Techniques for Near-Eye Integral Imaging Displays

We address the problem of 3D scene rendering on near-eye integral imaging displays and evaluation of different rendering methods in terms of human perception. We compare three rendering techniques in terms of perceived spatial resolution at different focused depths, simulating the display in virtual environment and representing the eye through a thin-lens camera model.acceptedVersionPeer reviewe

The key performance indicators of projection-based light field visualization

At the time of writing this paper, light field visualization has entered the professional environments in the industry and has also become commercially available. It is not yet present on the consumer market, however, and its widespread emergence is expected in the following decade, with affordable end user devices and a vast variety of applications and contents. The successful integration of this technology into people’s everyday lives essentially depends on the visualization quality, which is achieved through excellence in terms of the key performance indicators of the display system and the content it visualizes. In this paper, the key performance indicators of light field visualization for both display and content are reviewed. Beyond providing a comprehensive review of the vital parameters of visualization quality, this paper discusses the ongoing and future relevant research efforts, demonstrates the practical uses of the technology, highlights certain dependencies between the indicators, and addresses issues of perceived quality with regard to the lack of compliance with the requirements and visual thresholds

Estymatory GEE w modelu mieszanym ze zmiennymi współczynnikami koncentracji

We discuss a semiparametric mixture model where some components are parameterized with common Euclidean parameter and others are fully unknown. We introduce GEE (generalized estimating equations) approach and adaptive GEE-based approach for parameter estimation. Derived estimators are consistent and asymptotically normal, and they are optimized in terms of their dispersion matrices. Proposed techniques are tested on simulated samples.W pracy omówiono semiparametryczny model mieszany, w którym pewne współczynniki są parametryzowane za pomocą wspólnego parametru euklidesowego, natomiast inne są zupełnie nieznane. Wprowadzono metodę estymacji parametrów opartą na podejściu GEE (uogólnionych równań estymujących) oraz adaptacyjnym podejściu GEE. Proponowane estymatory zostały przeanalizowane w badaniu symulacyjnym

Screen-space ambient occlusion for light field displays

In this paper, we discuss the challenge of generating the screen-space ambient occlusion (SSAO) visual effect on the state-of-the-art Holo Vizio light field display. We detail the main features of modern SSAO techniques that are currently being applied during visualization on conventional 2D displays, and describe difficulties that potentially can appear when implementing this visual effect on 3D light field or similar systems. The main contribution of this paper is our own modification of the SSAO algorithm for light field displays. The paper also includes suggestions on the possible ways to improve its visual quality and performance