FLIR Photon Block 2 User Manual page 20

Photon User Guide 412-0035-00-10 Version 100
Pan & Zoom: The Pan & Zoom also called PAN_AND_TILT command controls the camera
when the image is zoomed. It does not have any effect when the image is not zoomed. The
center of the screen is considered as coordinate (0,0). A positive number is needed to pan
right and negative number to pan left. A pan value of 1 pans to the right by one column and a
pan value of -1 pans to the left by one column from the center of the image. A positive
number is needed to tilt downwards and a negative number to tilt upwards. A tilt value of 1
tilts downwards by one row and a tilt value of -1 tilts upwards by one row from the center of
the image. When the image is being panned or tilted the ROI moves along with these
coordinates. The limits for the zoom ROI have been set to one and a half times the number of
rows and columns in the video. This is to enable a user to pan and tilt the zoomed portion of
the image without any change in the AGC if the image being looked at does not change. This
also means that the AGC of the image is also determined by portions of the image that is not
being currently viewed. An example of this is as shown in the Figure 11.
Figure 11: ROI format
When the image is panned right to the maximum limit as shown in Figure 12, the number of
pixels in the ROI remains constant and the AGC of the image will not change.
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