Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Vision-based continuous Graffiti (TM)-like text entry system
Download
index.pdf
Date
2004-03-01
Author
Erdem, IA
Erdem, ME
Atalay, Mehmet Volkan
Cetin, AE
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
100
views
0
downloads
Cite This
It is now possible to design real-time, low-cost computer vision systems even in personal computers due to the recent advances in electronics and the computer industry. Due to this reason, it is feasible to develop computer-vision-based human-computer interaction systems. A vision-based continuous Graffiti(TM)-like text entry system is presented. The user sketches characters in a Graffiti(TM)-like alphabet in a continuous manner on a flat surface using a laser pointer. The beam of the laser pointer is tracked on the image sequences captured by a camera, and the corresponding written word is recognized from the extracted trace of the laser beam. (C) 2004 Society of Photo-Optical Instrumentation Engineers.
Subject Keywords
General Engineering
,
Atomic and Molecular Physics, and Optics
URI
https://hdl.handle.net/11511/34361
Journal
OPTICAL ENGINEERING
DOI
https://doi.org/10.1117/1.1645257
Collections
Department of Computer Engineering, Article
Suggestions
OpenMETU
Core
NEW HIGH-RESOLUTION DISPLAY DEVICE FOR HOLOGRAPHIC 3-DIMENSIONAL VIDEO - PRINCIPLES AND SIMULATIONS
Akar, Gözde; ATALAR, A (SPIE-Intl Soc Optical Eng, 1994-03-01)
A new acousto-optical holographic display device, which is expected to solve the display resolution and refresh problems that are common to available holographic displays, is proposed. The device is based on the reproduction of a hologram as a surface pattern using traveling surface acoustic waves (SAWs). There is an array of electrodes attached to the SAW device. An electrical signal applied to any one of these electrodes generates an acoustical wave propagating on the surface of the crystal. It signals ar...
Enhancing the image resolution in a single-pixel sub-THz imaging system based on compressed sensing
ALKUS, Umit; ERMEYDAN, Esra Sengun; Şahin, ASAF BEHZAT; CANKAYA, Ilyas; Altan, Hakan (SPIE-Intl Soc Optical Eng, 2018-04-01)
Compressed sensing (CS) techniques allow for faster imaging when combined with scan architectures, which typically suffer from speed. This technique when implemented with a subterahertz (sub-THz) single detector scan imaging system provides images whose resolution is only limited by the pixel size of the pattern used to scan the image plane. To overcome this limitation, the image of the target can be oversampled; however, this results in slower imaging rates especially if this is done in two-dimensional acr...
High-x InP/InxGa1-xAs quantum well infrared photodetector
Beşikci, Cengiz (Elsevier BV, 2018-12-01)
Quantum well infrared photodetector (QWIP) technology is still the only thermal imaging sensor technology providing excellent pixel operability, uniformity and stability together with low production cost and insignificant 1/f noise. The main bottleneck of the standard QWIP technology is the low quantum efficiency and device gain inhibiting the utilization of the sensor for low background and/or high frame rate applications. This manuscript reports unusually high quantum efficiency observed in mid-wavelength...
Object reconstruction from in-line Fresnel holograms without explicit depth focusing
Ozgen, MT; Tuncer, Temel Engin (SPIE-Intl Soc Optical Eng, 2004-06-01)
We propose two computational techniques for extracting object cross-sectional shape information from digitized in-line Fresnel holograms that do not require prior knowledge of object depths but recover relative depth information along the way. The first algorithm is applicable to hologram segments involving a single particle only. It is based on estimating Fourier transform magnitude and phase of the particle from those of the hologram segment. The second algorithm conducts a joint inverse filtering and dep...
Design and characterization of a resonator-based metamaterial and its sensor application using microstrip technology
Sabah, Cumali; Nesimoglu, Tayfun (SPIE-Intl Soc Optical Eng, 2016-02-01)
Design of a metamaterial based on an S-shaped resonator surrounded by a ground frame and excited by using a feeding transmission line on microstrip technology is presented. Since the resonator, ground frame, and its excitation mechanism are all realized on a microstrip, its characterization can be carried out using common laboratory equipment without needing any waveguide components or plane-wave-illumination techniques. The structure presented here may be realized on any microstrip and does not require spe...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
I. Erdem, M. Erdem, M. V. Atalay, and A. Cetin, “Vision-based continuous Graffiti (TM)-like text entry system,”
OPTICAL ENGINEERING
, pp. 553–558, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34361.