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|Title: ||Two-dimensional Barcodes for Mobile Phones|
|Authors: ||Lyons, Sarah|
|Advisor: ||Kschischang, Frank R.|
|Department: ||Electrical and Computer Engineering|
|Issue Date: ||15-Feb-2010|
|Abstract: ||There are several potential applications for a high data density barcode that can be easily photographed and decoded by mobile phones, but no such symbology currently exists. As a result, a new barcode was designed to exploit the low-pass characteristic of a camera phone channel and is presented as a means of facilitating wireless optical communication with mobile phones.
A channel model was established and subsequent simulation results led to the design of a colour barcode with encoding done in the Discrete Cosine Transform domain. A waterfilling process and a noise-shaping algorithm enhance performance, while a new fast acquisition method allows for rotational and size invariance. An outer Accumulate-Repeat-Accumulate code is employed, followed by an inner Reed Muller code with a rate varying according to spatial frequency.
The final barcode data-density is 3.5 times greater than the leading symbology and has proven robust to various impediments imposed by camera phones.|
|Appears in Collections:||Master|
The Edward S. Rogers Sr. Department of Electrical & Computer Engineering - Master theses
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