CameraControlProperty enumeration

The CameraControlProperty enumeration specifies a setting on a camera.

Syntax

typedef enum tagCameraControlProperty { 
  CameraControl_Pan,
  CameraControl_Tilt,
  CameraControl_Roll,
  CameraControl_Zoom,
  CameraControl_Exposure,
  CameraControl_Iris,
  CameraControl_Focus
} CameraControlProperty;

Constants

CameraControl_Pan

Specifies the camera's pan setting, in degrees. Values range from –180 to +180, with the default set to zero. Positive values are clockwise from the origin (the camera rotates clockwise when viewed from above), and negative values are counterclockwise from the origin.

CameraControl_Tilt

Specifies the camera's tilt setting, in degrees. Values range from –180 to +180, with the default set to zero. Positive values point the imaging plane up, and negative values point the imaging plane down.

CameraControl_Roll

Specifies the camera's roll setting, in degrees. Values range from –180 to +180, with the default set to 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.

CameraControl_Zoom

Specifies the camera's zoom setting, in millimeters. Values range from 10 to 600, and the default is specific to the device.

CameraControl_Exposure

Specifies the exposure setting, in log base 2 seconds. In other words, for values less than zero, the exposure time is 1/2^n seconds, and for values zero or above, the exposure time is 2^n seconds. For example:

Value	Seconds
-3	1/8
-2	1/4
-1	1/2
0	1
1	2
2	4

 

CameraControl_Iris

Specifies the camera's iris setting, in units of fstop* 10.

CameraControl_Focus

Specifies the camera's focus setting, as the distance to the optimally focused target, in millimeters. The range and default value are specific to the device.

Remarks

For a given property, a particular device might implement only a subset of the listed range.

Requirements

See also

DirectShow Enumerated Types

IAMCameraControl Interface

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Build date: 11/21/2012