Geography Reference
In-Depth Information
7 Augmented Camera View
This section discusses the functionality of the location based augmented reality
application that was developed for this study. At the current stage we have only
implemented a proof-of-concept interface.
7.1 The Sticky Object
The sticky object holds all the information pertaining to a particular sticky note.
The following is a list of the fields necessary for the current version of the pro-
gram. This list and the object may change in future to accommodate new and/or
different features.
• A location object containing:
- Latitude
- Longitude
- Altitude
• A radius
• A username
• A description
• A creation date
• An expiry date
The location object is used to determine where the phone is located. Latitude,
longitude and altitude are retrieved from the GPS unit in order to do this.
The radius of a note serves the same role as described in Sect. 5.3 . The user-
name is added to identify the creator of the note. Another possible attribute can be
the owner of a note. The description is the snippet of text attached to a sticky note.
It is whatever text the user has entered.
The creation date field records the creation time of the note. This is an
important value, because it can be used to refine a search.
The expiry date field records when the note will expire and not be returned in
any search by a user.
7.2 The Camera View
The camera view (Fig. 10 ) is created by dividing the surface of the activity into
two layers. The bottom layer is the camera preview. This view does not record
anything or take any photos it is simply a preview and shows what the camera can
see.
Search WWH ::




Custom Search