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| Microsoft DirectShow 9.0 |
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;
Members
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 1/2n seconds, and for values zero or above, the exposure time is 2n 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
Header: Dshow.h
See Also