Nokia NSERIES Cell Phone User Manual


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7.12
Chapter 7 Tagging Objects with the Nokia Point & Find Client Application
Tag an object multiple times from a few different angles and dis-
tances – and under different lighting conditions when appropriate
– in order to improve recognition success of your targets (objects).
Depending on the object, three to ve tags per environmental condi-
tion – day/night, indoor/outdoor lighting – is sufcient.
Include tags with a focus on any logo names or xed images that are
on (or part of) an object, and also include tags with a focus on the
entire object.
Do not focus on small text or areas within the target that may change
over time (as in a window display that will change in a store front).
In summary:
• Tag objects from multiple angles
(approximately 30 degrees each side of center).
• Tag objects from the front and back, close up, and
from a distance.
• Tag objects under several lighting conditions
(day, night, bright, cloudy, articial lights, etc.)
• Include tags for logos or xed images that are part of,
or on, an object
• Do not tag small text areas or images that will
change over time
Helpful pointers for tagging
Lighting Conditions
Ifanobjectisalwaysinthe
same lighting (such as an
indoor object under constantly
controlled lighting), taking
threetovetagsoftheobject
willsufce.
Ifanobjectisfoundunderdif-
ferent lighting conditions (day,
night, bright, cloudy, supple-
mental lights on or off, etc.),
thentakethreetovetagsof
the object under each (or most)
lighting conditions.
Multiple Tagging
When tagging a movie poster,
for example, Nokia will take
vetagsofaposterfromdiffer-
ent angles and distances, under
one to three different lighting
conditions for a total of approx.
veto15tags.Whentagging
astorefront,Nokiawilltakeve
to 10 tags from different angles
at a distance of approx. six feet
and 12 feet from the store for a
total of 10 to 20 tags.
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