Constant

Description

ltmmCameraControl_Pan

[1] Specifies the pan property. The pan property is measured in degrees. Possible values range from –180 to +180. The default value is zero. Positive values are clockwise from the origin (the camera rotates clockwise when viewed from above), and negative values are counterclockwise from the origin. 

ltmmCameraControl_Tilt

[2] Specifies the tilt property. The tilt property is measured in degrees. Possible values range from –180 to +180. The default value is zero. Positive values point the imaging plane up, and negative values point the imaging plane down.

ltmmCameraControl_Roll

[3] Specifies the roll property. The roll property is measured in degrees. Possible values range from –180 to +180. The default value is zero. Positive values cause a clockwise rotation of the camera along the image-viewing axis, and negative values cause a counterclockwise rotation of the camera.

ltmmCameraControl_Zoom

[4] Specifies the zoom property. The zoom property is measured in millimeters. Values range from 10 to 600 or as stated by the device documentation.

ltmmCameraControl_Exposure

[5] Specifies the exposure (shutter speed) property. The exposure property is measured in “log base 2” seconds. In other words, for values less than zero, the exposure time is 1/2ⁿ seconds, and for values zero or above, the exposure time is 2ⁿ seconds.

ltmmCameraControl_Iris

[6] Specifies the iris property. The iris property is measured in units of (f-stop * 10). F-stop is aterm used to indicate the amount of light passing through the lens. The smaller the f-number, the greater the amount of light passing through the lens.

Typical F-stops included on manual-iris lenses are 1.4, 2.0, 2.8, 4.0, 5.6, 8.0, 11, 16, and 22 (these are actual values, not multiplied by 10).

ltmmCameraControl_Focus

[7] Specifies the focus property, as the distance to the optimally focused target. The focus property is measured in millimeters. The range and default value are specific to the device.