Technical data

SightLine Applications Command and Control

Byte offset Description

2 Packet length = 17

3 Packet type = 0x2F

Bit 0 Offset Mode (see examples below)

0 Interpret bytes 5&6 as incremental offsets

1 Interpret bytes 5&6 as absolute offsets

Bit 1 Absolute Zoom Mode NEW 2.20

0 Zoom (1 … 255) maps to (0.9 … 1.1). Usually used

when both cameras are SD or have matching pixel

size on target.

1 Zoom (1 … 255) maps to (0.004 … 0.996). Usually

used when one camera is HD and the other is SD.

Bits 2-7 Reserved

Shift EO camera position vertically.

(-128...127) number of pixels.

Negative number = up

Positive number = down

Shift EO camera position horizontally.

(-128...127) number of pixels.

Negative number = left

Positive number = right

Rotation of EO camera (1 … 255) maps to (-5 … 5) degrees

0 = don't change rotation (default)

Zoom scale factor applied to EO camera (1 … 255). Maps to

(0.9 … 1.1) or to (0.004 to 0.996), depending on Absolute Zoom

Mode in byte 4

0 = don't change zoom (default)

9 Blend mode:

Value Description

0 Don't change (default)

1 Frame Blend – basic percentage (controlled by

Amount) blending of the two images, Optionally

applies yellow Hue from bright areas in the EO image

to the output.

2 Thermal Blend – blends hot pixels from the IR camera