Thermography System VarioCAM
®
HD
9
. Introduction
70
© InfraTec GmbH 2016
User Manual
The settings that can be selected in the "Extras" menu item activate the following functions:
■
Premium*
A camera-internal compensation (NUC) is performed before each saving.
■
RE*
"Resolution Enhancement" – In order to save the image, the hardware-based microscan
procedure is activated (recording procedure in order to increase the geometric
resolution). The thermal image is scanned optically several times, whereby the geometric
resolution from (1.024 x 768) to (2.048 x 1.536) and/or from (640 x 480) to (1.280 x 960)
IR pixels is reached by shifting the pixel allocation by half a pixel width in each case. In
order to use the Resolution Enhancement function, the thermography system must be
positioned firmly (tripod) and this function is only suitable for measuring objects with a
constant temperature.
■
DRE*
"Dynamic Resolution Enhancement" – In addition to the activation of the Resolution
Enhancement function’s hardware, the motions of the microscan mechanics and the
measuring objects are used by means of specific software routines in order to increase
the geometric resolution. This way, the function is also suitable for manual operation and
moving objects.
■
Eversharp*
The images are stored as an image series in a file. With the activation of Eversharp/
multi-focus function, the focus setting is changed gradually for shorter and further
distances between the individual recordings. In this way, all parts contained in the
current scene of the image can be captured sharply in at least one of the individual
recordings. When loading the Eversharp sequence IRBIS
®
3 calculates from the
Eversharp sequence a deep sharp image. The display of distance corresponds to the
initial setting. A display of distance corrected images with VarioCAM
®
HD is not
possible.
■
Settings*
Parameterisation of Eversharp function; the setting is explained below:
Fig. 164 Eversharp (Multi-focus) setting of number
of steps
Fig. 165 Eversharp (Multi-focus)setting of step
range
Depending on the lens, the object distance, and object used, changing the Eversharp/ multi-focus
parameter may be necessary for optimal image correction. For shorter distances and scenes with very
different intervals of individual image parts, a greater number of steps are recommended. The number of
steps corresponds to the number of recordings, and after the last shot, focusing is reset to the initial
settings. It can be adjusted from 3 to maximum 10 steps (=single shot). In turn, the lens, the object
distance and object also depends on the step range: For small differences, the setting is “minimum or
small” and for greater differences, the setting is “normal or large”.
The use of the Eversharp/ multi-focus function requires the permanent installation of the camera.
The function is not suitable for moving objects and measuring of rapid changes in temperature.
InfraTec
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