Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Demo: Scalable Visual Codes for Embedding Digital Data in the Physical World
Uppsala University, Sweden.
RISE, Swedish ICT, SICS.ORCID iD: 0000-0002-9652-0750
RISE, Swedish ICT, SICS, Computer Systems Laboratory. Uppsala University, Sweden.ORCID iD: 0000-0002-2586-8573
2015 (English)In: Proceedings of the 13th ACM Conference on Embedded Networked Sensor Systems (SenSys '15), 2015, 9, p. 457-458Conference paper, Published paper (Refereed)
Abstract [en]

Visual codes, such as QR codes, offer a low-cost alternative to RF technology when digital data needs to be embedded in objects in the physical world. However, in order to sup- port receivers with a poor visual channel, e.g. low-resolution cameras, most visual codes are designed for low data capacity and short reading distances. We present our work-in-progress on Focus, a visual code that avoids earlier work’s explicit trade-off between code capacity and channel quality. Rather than encoding the pay- load directly into individual pixels, Focus encodes the pay- load over a range of spatial frequencies. As a result, even a receiver with a very poor channel (e.g., with low-resolution camera or motion blur) can still partly decode a Focus code, because the code’s low-frequency components are robust to common channel impairments. A receiver with a good channel can decode all data from the same code. In our demo, we will present a prototype of Focus for smartphones and showcase how it deals with common impairments of the visual channel.

Place, publisher, year, edition, pages
2015, 9. p. 457-458
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:ri:diva-24488DOI: 10.1145/2809695.2817852Scopus ID: 2-s2.0-84962898731ISBN: 978-1-4503-3631-4 (print)OAI: oai:DiVA.org:ri-24488DiVA, id: diva2:1043572
Conference
13th ACM Conference on Embedded Networked Sensor Systems (SenSys 2015), November 1-4, 2015, Seoul, South Korea
Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2023-06-08Bibliographically approved

Open Access in DiVA

fulltext(394 kB)211 downloads
File information
File name FULLTEXT01.pdfFile size 394 kBChecksum SHA-512
bb2e32c8fd997631e0554f0d5651fa80233ff91178a83db3626adcffae9b2281f910c8f57299db1ec35a9bc38c7df4544dd38dd12b75feefa85bdbd9b747aca6
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopushttp

Authority records

McNamara, LiamVoigt, Thiemo

Search in DiVA

By author/editor
McNamara, LiamVoigt, Thiemo
By organisation
SICSComputer Systems Laboratory
Computer and Information Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 211 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 167 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf