Description Of Serial Commands - FLIR Photon User Manual

Appendix B—Serial Communication Technical Details
B.6

Description of serial commands

B.6.1 Camera Defaults
The RESET_FACTORY_DEFAULTS command sets the current settings to the factory default
values. In order to save these values as power up defaults, it is necessary to do a
SET_DEFUALTS command.
B.6.2 AGC algorithms
Use the AGC_TYPE command to select one of the following AGC algorithms:
• Plateau histogram
• Once Bright
• Auto Bright
• Manual
• Linear
B.6.3 Pan and Tilt
The PAN_AND_TILT command controls this feature in 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.
B.6.4 DDE filter
The commands to control the DDE filter settings are DDE_GAIN to control the gain,
DDE_THRESHOLD to control the DDE filter threshold and SPATIAL_THRESHOLD to control the
spatial threshold of the DDE filter. The image remains unchanged when the value of the DDE
gain is 0 and 16. The image becomes unfocused/unsharpened when the value is between 1
and 15. The image becomes more sharpened when the value is above 16. Increasing the DDE
threshold will make the edges sharper. For threshold values between 0 and about 50 the effect
on the image is lesser and has a greater effect above approximately 50. Increasing the spatial
threshold value will make the image look smoother.
B-12 February 2008
Photon User's Manual
412-0035-00-10, version 110