3—Basic Operation of the Tau 640 and GUI
Tau 640 User’s Manual
3-16
June 2011
TAU-0640-00-10, version 110
Image-Orientation Mode:
Two Image-Orientation mode selections are provided. Select
one or both to change the orientation of the video image.
Invert
: The normal image is flipped
vertically. The pixel on the upper-left
corner of the detector array is displayed
on the lower-left corner of the video
display in Invert mode. Invert is used when
mounting the camera upside-down.
Invert
applies to analog, BT.656, CMOS, and LVDS video.
Revert
: The normal image is flipped horizontally. The pixel on the upper-right corner of
the detector array is displayed on the upper-left corner of the video display. Revert
mode produces a mirror-image of Normal mode; use for applications where the
camera is imaged through a mirror.
Revert
applies to analog and BT.656 video only.
Note
Pan & Zoom, Zoom:
The Tau 640
camera has a built-in 2
×,
4
×,
and 8
×
digital
zoom capability. The
Zoom
check boxes are
used to turn on/off the camera zoom. With
the
Unzoom
box checked, the Tau 640
camera displays the full sensor array image.
When the
Zoom 2x
box is checked, a smaller
central region of the sensor array is mapped
to the video output creating the zoom effect.
For NTSC and PAL video formats in 2
×
zoom
mode, 320
×
240 and 320
×
256 pixels,
respectively, are mapped to the analog video
output. When the
Zoom 4x
box is checked,
160
×
120 (NTSC) and 160
×
128 (PAL)
pixels, respectively, are mapped to the
analog video output. When the
Zoom 8x
box
is checked, 80
×
60 (NTSC) and 80
×
64
(PAL) pixels, respectively, are mapped to the
analog video output. This reduced region of
the array is called the zoomed array region.
The BT.656 video output also has the zoom feature, but the CMOS and LVDS do not.
Pan & Zoom, Pan:
When in either zoomed mode, you can move the zoomed array region
within the full array area. This digitally simulates panning and tilting. Panning and tilting are
defined as moving the camera image in the horizontal and vertical axes, respectively. The FLIR
Camera Controller GUI Pan and Tilt limits are ±80 × ±60; and ±40 × ±30 when in the
Fine
range.
Checking the fine box increases the sensitivity of the slide control so that the zoomed array
moves one half the total range but all step values are achievable. Simple experimentation while
viewing the displayed image will quickly give you familiarity with this feature.
Any time the image orientation mode is inverted, a flat-field correction automatically takes
place. Adjusting image orientation should always be followed by a flat-field correction in all
modes.
Select to
enter offsets
Click to
center
Tilt
slider
Pan
slider