A high-resolution autostereoscopic display system with a wide viewing angle using an LCOS projector array

The automatic detection of falls within environments where sensors are deployed has attracted considerable research interest due to the prevalence and impact of falling people, especially the elderly. In this work, we analyze the capabilities of non-invasive thermal vision sensors to detect falls using several architectures of convolutional neural networks. First, we integrate two thermal vision sensors with different capabilities: (1) low resolution with a wide viewing angle and (2) high resolution with a central viewing angle. Second, we include fuzzy representation of thermal information. Third, we enable the generation of a large data set from a set of few images using ad hoc data augmentation, which increases the original data set size, generating new synthetic images. Fourth, we define three types of convolutional neural networks which are adapted for each thermal vision sensor in order to evaluate the impact of the architecture on fall detection performance. The results show encouraging performance in single-occupancy contexts. In multiple occupancy, the low-resolution thermal vision sensor with a wide viewing angle obtains better performance and reduction of learning time, in comparison with the high-resolution thermal vision sensors with a central viewing angle.

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Paperlike Microencapsulated Electrophoretic Materials and Displays

MRS Bulletin ◽

10.1557/mrs2002.279 ◽

2002 ◽

Vol 27 (11) ◽

pp. 894-897 ◽

Cited By ~ 17

Author(s):

Peter T. Kazlas ◽

Michael D. McCreary

Keyword(s):

High Resolution ◽

Low Power ◽

Viewing Angle ◽

Optical Reflectance ◽

Flexible Displays ◽

Wide Viewing Angle ◽

Recent Developments ◽

The Look

AbstractMicroencapsulated electrophoretic (MEP) materials exhibit high optical reflectance and contrast, wide viewing angle, high resolution, and excellent image stability. MEP materials can be easily printed on large plastic sheets and laminated to a variety of electronic backplanes to construct displays. The combination of a MEP material with flexible transistor technologies enables displays that offer both the look and form of the printed page. This article reviews the basic architecture and properties of MEP materials and describes the integration of MEP materials with transistor backplanes to produce high-resolution, low-power, paperlike displays. Recent developments in ultrathin flexible displays are also reported.

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Study on the Reduction Effect of Stereo Depth Caused by Lens Aberration in Lenticular-Based Autostereoscopic Displays

Applied Sciences ◽

10.3390/app9030380 ◽

2019 ◽

Vol 9 (3) ◽

pp. 380

Author(s):

Ping Su ◽

Shu An ◽

Jianshe Ma ◽

Ni Chen

Keyword(s):

Three Dimensional ◽

Viewing Angle ◽

Display System ◽

Lens Array ◽

Autostereoscopic Display ◽

Autostereoscopic Displays ◽

The Difference ◽

Reduction Effect ◽

Similar Factor ◽

Sudden Decrease

Autostereoscopic displays employing lenticular sheets have broad applications due to the high transmittance of lenticular sheet. However, due to the restriction of lens array design and processing, the imperfect image of lenses can reduce the quality experience of autostereoscopic displays. Stereo depth is one of the qualities of experience parameters, which relates to the three-dimensional effect. Therefore, to quantize the reduction effect of stereo depth caused by lens aberration is of great value. In this paper, we implement a binocular model of an autostereoscopic display system with lens array to analyze this effect, which is different from the previously used monocular model. Two receivers in the positions of viewer’s eyes are set on the viewing plane, and a similar factor is defined to evaluate the difference of light spots perceived by the two receivers. When the similar factor exceeds a certain value, the two spots cannot be fused in the brain, thus restricting the perceived stereo depth. Both in simulation and experiment, a sudden decrease of the similar factor is observed when the viewing angle exceeds 16°. In the subjective experiment, all the sixteen viewers feel a sudden decrease of stereo depth when the viewing angle exceeds 16°, which further verifies the validity of the model. The model and the method are significant for improving the viewing experience of autostereoscopic displays and providing a guidance on autostereoscopic display system designing.

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