e2v argus, Operating And Maintenance Instructions Manual

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e2v technologies (uk) limited 2013 CR 113590 P7250UM version 4, page 7
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Search & Compare Modes
The Argus
®
F-Type has two specialist search image processing modes to assist
detailed search and detection. These are Search Mode and Compare Mode.
Both are available in black or white hot imagery.
Search mode is especially suited to the detection of faint heat sources. In this
mode the image sets mid grey to be the temperature in the central spot temperature
box with the black to white range in the image set to be either 1, 2 or 4°C as chosen
by the user.
The range is adjusted by the use of the right button (normally zoom) and the current
setting is displayed in the bottom left of the screen.
Shown right is a typical image
taken in the 1°C range
Note that with this mode the
image may contain large
areas of black and white if the
whole current image has large
areas that differ widely from
the central spot, especially in
the 1°C range setting.
Compare mode allows the comparison of adjacent heat sources where the
temperature difference is of interest. Pressing the right hand button will lock the
image settings at that of the scene, and all subsequent scenes are displayed with
the same temperature range as the ‘locked in’ setting. This makes it much easier to
compare objects when it is not possible to put them in the same field of view.
Whether the image is locked or not is displayed in the bottom left of the screen
Shown right is a typical image
with the range locked
Note that with this mode it is
possible to get a blank screen
if the whole current image is
outside the range of the
‘locked-in’ image
The unlocked icon. Click the
right button to lock the image
levels