PROBLEM: The object-space coordinates of an
object (2m x 5m x
3m) are required to be accurate to within +0.11mm.
A P31 (Wide angle) camera with f - 100mm lens, a UMK
camera (f - 100mm), and a Zenzanon etr camera with a
150mm lens are available. Determine the suitability
of each of these cameras for the task.
SYSTEM
What is the object's name ?
Object-space coordinate of the water tank is
to be correct to within +...mm
Largest dimension of the water tank:...metres
Application is real time ? [yes,no]
Helps to determine whether digital or analogue
camera is required
Application is real time ? [yes,no]
Analogue camera available is [UMK, CRC-1,
P31(Wide angle), other(s)]
Unit cost per camera station ?
P31(Wide angle) is suitable for the task. Want
to evaluate another camera ? [yes,no]
Analogue camera available is [UMK, CRC-1,
P31(Wide angle), other(s)]
UMK is suitable for the task. Want to evaluate
another camera ? [yes,no]
Analogue camera available is [UMK, CRC-1,
P31(Wide angle), other(s)]
NOTE: system presents user with a form for
updating the camera database,
cameras.dbf (see Fig. 7)
Zenzanon etr is unsuitable for the task. The
optimum accuracy that can be achieved with it
is #0.127mm. Press «RETURN» to nominate
another camera for evaluation.
USER
water tank
0.11
«F3»
no
P31(Wide
angle)
3
yes
UMK
yes
other(s)
RECOMMENDATION: P31(Wide angle) and UMK cameras are suitable
for the task. While Zenzanon etr is not.
Fig. 6: A typical consultation session
UPDATING CAMERA DATABASE
and update the database.
Press <ESC> to quit the selection and return
Enter characteristics of camera to fields provided.
Press «CTRL» with «ENTER» to complete the selected function
to main menu.
record #:
Manufacturer
Model :
Focal length : mm.
Length of photo format : mm.
Width of photo format : mm.
Minimum focusing range : metres
a priori precision of image-cood : pm.
Fig. 7: form for 'updating database' of
cameras
