Content deleted Content added
→QR code payment: Typo Tags: Mobile edit Mobile web edit |
converted Frame QR and HCC2D sections to use galleries for examples and changed wording of captions to align with other examples |
||
Line 401:
=== Frame QR ===
Frame QR is a QR code with a "canvas area" that can be flexibly used. In the center of this code is the canvas area, where graphics, letters, and more can be flexibly arranged, making it possible to lay out the code without losing the design of illustrations, photos, etc.<ref>{{cite web|title=Frame QR|url=http://www.qrcode.com/en/codes/frameqr.html|website=qrcode.com|access-date=26 December 2017|archive-date=20 December 2017|archive-url=https://web.archive.org/web/20171220045522/http://www.qrcode.com/en/codes/frameqr.html|url-status=live}}</ref>
<gallery widths="200 heights="100" ">
File:Frame QR Code.png|Frame QR example
File:Wiki-FQRC.png|Frame QR code example with a circular frame and the [[Wikipedia logo]] composed into its interior
</gallery>
=== HCC2D ===
[[File:Hcc2d.png|thumb|Samples of the High Capacity Colored 2-Dimensional (HCC2D) code: (a) 4-color HCC2D code and (b) 8-color HCC2D code.]]▼
Researchers have proposed a new High Capacity Colored 2-Dimensional (HCC2D) Code, which builds upon a QR code basis for preserving the QR robustness to distortions and uses colors for increasing data density (as of 2014 it is still in the prototyping phase). The HCC2D code specification is described in details in Querini ''et al.'' (2011),<ref>{{cite journal |last1=Querini |first1=M|last2=Grillo|first2=A|last3=Lentini|first3=A|last4=Italiano|first4=GF |title=2D Color Barcodes for Mobile Phones |journal=International Journal of Computer Science and Applications |date=2011 |volume=8 |issue=1 |pages=136-155 |url=http://www.tmrfindia.org/ijcsa/v8i19.pdf |access-date=21 December 2024|archiveurl=https://web.archive.org/web/20160304033918/http://www.tmrfindia.org/ijcsa/v8i19.pdf|archivedate=4 March 2016|publisher=Technomathematics Research Foundation}}</ref> while techniques for color classification of HCC2D code cells are described in detail in Querini and [[Giuseppe F. Italiano|Italiano]] (2014),<ref>{{cite journal |last1=Querini |first1=Marco |last2=Italiano |first2=Giuseppi F |title=Reliability and Data Density in High Capacity Color Barcodes |journal=Computer Science and Information Systems |date=2014 |volume=11 |issue=4 |pages=1595-1615 |doi=10.2298/CSIS131218054Q |url=http://www.doiserbia.nb.rs/img/doi/1820-0214/2014/1820-02141400054Q.pdf |access-date=21 December 2024|archiveurl=https://web.archive.org/web/20150724205900/http://www.doiserbia.nb.rs/img/doi/1820-0214/2014/1820-02141400054Q.pdf|archivedate=24 July 2015}}</ref> which is an extended version of Querini and Italiano (2013).<ref name="Querini and Italiano (2013)">{{cite web|publisher=Federated Conference on Computer Science and Information System|url=https://fedcsis.org/proceedings/2013/pliks/67.pdf|date=2013|title=Color classifiers for 2D color barcodes|last1=Querini |first1=Marco |last2=Italiano |first2=Giuseppi F|url-status=dead|archive-url=https://web.archive.org/web/20150724212247/https://fedcsis.org/proceedings/2013/pliks/67.pdf|archive-date=24 July 2015}}</ref>
Introducing colors into QR codes requires addressing additional issues. In particular, during QR code reading only the brightness information is taken into account, while HCC2D codes have to cope with chromatic distortions during the decoding phase. In order to ensure adaptation to chromatic distortions that arise in each scanned code, HCC2D codes make use of an additional field: the Color Palette Pattern. This is because color cells of a Color Palette Pattern are supposed to be distorted in the same way as color cells of the Encoding Region. Replicated color palettes are used for training machine-learning classifiers.
<gallery widths="250" heights="100">
▲
</gallery>
=== Accessible QR (AQR) ===
| |||