Results 221 to 230 of about 39,582 (257)

Imaging spectroscopy with a multi-aperture camera

2009 IEEE LEOS Annual Meeting Conference Proceedings, 2009
A new type of spectroscopic sensitive camera was used in a clinical trial at the National Rehabilitation Hospital aimed at monitoring the healing process of several types of skin wounds. Results showed signi oxygen saturation related to a decrease in wound size.
Jessica C. Ramella-Roman, Ali Basiri, Marjan Nabili   +2 more
openaire   +1 more source

A multi-aperture imager for a wearable camera

SPIE Proceedings, 2014
A compact multi-aperture lens system consists of separate units deployed on a bendable substrate. Each unit includes a fast lens and wobbling sensor which allow high resolution image over a limited field of view.
Mamoru Miyawaki, Dmitry Reshidko, Nasser Peyghambarian, Jose Sasián   +3 more
openaire   +1 more source

Digital focusing and refocusing with thin multi-aperture cameras

SPIE Proceedings, 2012
For small camera modules in consumer applications, such as mobile phones or webcams, size and cost are important constraints. An autofocus system increases both size and cost and can degrade optical performance by misalignment. Therefore, a monolithic optical system with a fixed focus is preferable for these applications.
Alexander Oberdörster, Andreas Brückner, Frank Wippermann, Andreas Bräuer, Hendrik P. A. Lensch   +4 more
openaire   +2 more sources

Performance Metrics for Multi-aperture Computational Imaging Sensor

Frontiers in Optics, 2005
Determining the effective MTF, SNR and Sensor geometries of multi-aperture computational imaging architectures will allow the National Image Interpretability Rating Scale to be applied to computational imagers. An approach for determining these values is described.
Vikrant Bhakta, Marc P. Christensen, Dinesh Rajan   +2 more
openaire   +1 more source

Dense lightfield reconstruction from multi aperture cameras

2014 IEEE International Conference on Image Processing (ICIP), 2014
Plenoptic cameras based on micro lens arrays as well as multi aperture cameras are able to capture a multitude of images with slightly shifted viewpoints. Although the amount of parallax between adjacent views is limited, precautions have to be taken in order to avoid alias when performing direct lightfield rendering.
Matthias Ziegler 0001, Frederik Zilly, Peter Schäfer, Joachim Keinert, Michael Schöberl, Siegfried Foessel   +5 more
openaire   +1 more source

3D scene reconstruction from multi-aperture images

SPIE Proceedings, 2014
With the development of virtual reality, there is a growing demand for 3D modeling of real scenes. This paper proposes a novel 3D scene reconstruction framework based on multi-aperture images. Our framework consists of four parts. Firstly, images with different apertures are captured via programmable aperture.
Miao Mao, Kaihuai Qin
openaire   +1 more source

Multi-aperture imaging and its application

2015 14th Workshop on Information Optics (WIO), 2015
Multi-aperture imaging provides a variety of modalities in object observation. A compound-eye camera called TOMBO is an effective platform for computational imaging based on multi-aperture imaging. As an example of medical application, a TOMBO imaging system was applied to 3D shape measurement of teeth and gingivae and to estimation of gingival tissue ...
openaire   +1 more source

Computational imaging based on multi-aperture optics

SPIE Proceedings, 2015
Combination of optical encoding and algorithmic decoding provides high-performance and high-functional imaging modalities known as computational imaging. Multi-aperture optics has been effectively utilized as an optical encoder and enables us to implement novel imaging methods and systems.
Jun Tanida, Ryoichi Horisaki
openaire   +1 more source

Imaging with multi-aperture optical telescopes and an application

Comptes Rendus de l'Académie des Sciences - Series IV - Physics, 2001
Abstract The two main types of Multi-Aperture Optical Telescopes (MAOTs) (so-called Michelson and Fizeau) and the two possible modes of optical beam combination are reviewed. Wide-field imaging with a Michelson instrument is studied and the constraints are identified. An example of application to Earth observation is given.
Gérard Rousset, Laurent M. Mugnier, Frédéric Cassaing, Béatrice Sorrente   +3 more
openaire   +1 more source

Waveguide to Microstrip Multi-Aperture Directional Coupler

9th European Microwave Conference, 1979, 1979
A navel rectangular waveguide to microstripline multi-aperture directional coupler has been developed for operation in X-band. The results of investigations on coupling through large apertures used as elements of a multi-aperture coupler and the design of a waveguide to microstripline directional coupler are presented. The directivity of the coupler is
S.N. Prasad, S. Mahapatra
openaire   +1 more source