Reduced-complexity disparity estimation for efficient multiview imagery encoding

3D display technology has witnessed a rapid development in the past decades. Currently 3D displays are being widely used in different application areas such as education, broadcasting, entertainment, surgery, video conferencing, etc. However, this technology owes its success to the other complementary technologies such as image acquisition, compression and transmission. In multiview displays, the realism of the reproduced 3D scene is dependent on the number of available views that the displays can show. These view images can be captured from different viewpoints of a scene by using a camera array. A smoother transition between views can be obtained by increasing the number of cameras located in the camera array. However, this comes at the price of an increased amount of image data which needs to be encoded (compressed) to store and transmit the data efficiently. The computational load of the multiview encoder is high and needs to be mitigated. This thesis focuses mainly on encoding multiview images captured by a 2D camera array efficiently in terms of complexity besides quality and bit-rate. The results on this thesis show that the complexity of the encoder can be reduced significantly without compromising the quality and bitrate

A liquid crystal based contact lens display using PEDOT: PSS and obliquely evaporated SiO2

An active spherically conformed liquid crystal cell is presented comprising PEDOT:PSS as a transparent conductive layer and obliquely evaporated SiO2 as an alignment layer. To tackle compatibility issues with the SU8 processing needed for the spacers, an additional buffer layer was included in the fabrication process. The electro-optic response is inspected closely and a contrast measurement is given

Demonstration of a multiview projection display using decentered microlens arrays

In this work we present a prototype multiview projection display that combines high-spatial and high-angular resolution with low complexity, compact form factor and potentially low-cost design. The system consists of a single projector and an image steering projection screen. It is based on beam steering using decentered microlens arrays in the projection screen and time-sequential rear-projection of the view images. The prototype has a 25 in. screen, a total of 27 viewing zones with XGA resolution and a horizontal fiel of view of 30 degrees. (C) 2010 Optical Society of Americ

Microencapsulation of Moisture-Sensitive CaS:Eu2+ Particles with Aluminum Oxide

Single-crystal, submicrometer-sized CaS:Eu luminescent particles were synthesized via a solvothermal route, and these moisture-sensitive particles were coated with aluminum oxide using atomic layer deposition (ALD). Photoluminescence (PL) spectra of coated and uncoated particles were compared. They both showed a broad-band PL emission with a maximum of 650 nm. Microencapsulation by aluminum oxide layers did not have a pronounced effect on the intensity of the emission. In situ luminescence measurements during the accelerated aging (80 degrees C, 80% relative humidity) of coated and uncoated CaS: Eu particles were performed. While the uncoated phosphor was largely degraded within 30 h of aging, it was observed that a 20 nm thick aluminum oxide coating dramatically increased the resistance of the luminescent material against moisture, showing the conformity of the Al2O3 coating by the ALD process. Upon degradation, CaCO3 was formed, leading to Eu3+ emission as observed in cathodoluminescence. Finally, the use of these coated particles as a wavelength conversion material in light-emitting diodes was evaluated

Wrinkle formation in conformable liquid crystal cells for use in a contact lens display

Wrinkle formation in conformable liquid crystal cells for use in a contact lens display was investigated. Smooth cells with minimal thickness were obtained when using an asymmetric configuration with a thin layer at the convex side and a thicker but threshold dependent layer at the concave side