Optimizing Processes with RFID and Auto ID, 2009
Optimizing Processes with RFID and Auto ID, 2009
Optimizing Processes with RFID and Auto ID, 2009
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3 Optical codes<br />
that up to 28 % of the data field can be faulty <strong>with</strong>out an incorrect<br />
reading resulting. We must observe that smaller faults of the finder<br />
<strong>and</strong> frequency edge can also result in non-reading as they are not included<br />
in the error correction process. In this case, the ability to compensate<br />
for such errors primarily depends on the reading capabilities<br />
of the camera systems.<br />
2D codes also meet high dem<strong>and</strong>s pertaining to data consistency <strong>and</strong><br />
availability <strong>with</strong> their direct marking options. Mechanically effective<br />
marking processes also ensure that towards the end of a product life<br />
cycle, the code can be found <strong>and</strong> remains readable. In cases where<br />
labels or <strong>RF<strong>ID</strong></strong> tags have failed, for example <strong>with</strong> medical instruments<br />
that are sterilized hundreds of times over, 2D codes have proven their<br />
suitability.<br />
In the future, a fully different kind of security view should not remain<br />
unobserved in the eyes of industry. If the availability of appropriate<br />
reading devices was still a restricting factor in the past due to relatively<br />
high prices, nowadays several mobile phones <strong>with</strong> a camera <strong>and</strong><br />
decoding algorithms can easily be re-equipped as 2D code reading<br />
systems. Hacker attacks <strong>and</strong> unauthorized access to company data are<br />
simplified due to this. Therefore, it makes sense to utilize cryptographic<br />
processes for security in those cases involving sensitive data.<br />
3.4 Application <strong>and</strong> marking methods<br />
3.4.1 Application of labels<br />
Generally, printing a label under controlled conditions leads to print<br />
results closer to st<strong>and</strong>ards <strong>and</strong> comparatively high contrasts. This<br />
considerably simplifies the requirements of the reading systems,<br />
making the respective use of inexpensive devices possible. A further<br />
advantage of labels is that the material properties as opposed to some<br />
mechanical marking processes are not changed. However, robust, durable<br />
availability requires expensive label material.<br />
In particular when dealing <strong>with</strong> high quantities, the cost for highquality<br />
<strong>and</strong> at the same time reasonably durable labels play a significant<br />
role. In this case, it is worthwhile to check for alternative options<br />
for direct marking of objects.<br />
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