427-0033-00-12 Version 110
February 2019
29
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Basic Operation and Configuration
To maintain security of the system, set new passwords for all of the login accounts.
•
anonymous
—Used for ONVIF communication.
•
user
—The user account can only use the
Live Video
page and controls.
•
expert
—The expert account can use the
Live Video
page, the camera
Setup
page, the Server
pages on the
Maintenance
menu, and set the password for the expert login.
•
admin
—The admin account can use all pages and set passwords.
2.4
Thermal Imaging Overview
The thermal camera makes an image based on temperature differences. In the thermal image, by
default the hottest item in the scene appears as white and the coldest item is black, and all other
items are represented as a gray scale value between white and black.
It takes some time getting used to the thermal imagery from the camera, especially for someone who
only has experience with normal daylight cameras. An understanding of the differences between
thermal and daylight cameras can help with getting the best performance from the thermal camera.
Both thermal and daylight cameras have detectors (pixels) that detect energy. One difference
between thermal and daylight cameras has to do with where the energy comes from to create an
image. When viewing an image with an daylight camera, there has to be a source of visible light
(such as the sun or lights) that reflects off the objects in the scene to the camera. The same is true
with human eyesight; the vast majority of what people see is based on
reflected
light energy.
On the other hand, the thermal camera detects energy that
is directly
radiated
from objects in the scene. Most objects
in typical surroundings are not hot enough to radiate visible
light, but they easily radiate the type of infrared energy that
the thermal camera can detect. Even very cold objects, like
ice and snow, radiate this type of energy.
The camera is capable of sensing very small temperature
differences, and produces a video image that typically has
dramatic contrast in comparison to daylight cameras. This
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