QCameraFocusZone露

PyQt5.QtMultimedia.QCameraFocusZone

Description露

The QCameraFocusZone class provides information on zones used for autofocusing a camera.

For cameras that support autofocusing, in order for a camera to autofocus on part of a sensor frame, it considers different zones within the frame. Which zones to use, and where the zones are located vary between different cameras.

This class exposes what zones are used by a particular camera, and a list of the zones can be retrieved by a QCameraFocus instance.

You can use this information to present visual feedback - for example, drawing rectangles around areas of the camera frame that are in focus, or changing the color of a zone as it comes into focus.

#     focus->setFocusPointMode(QCameraFocus::FocusPointAuto);
#     QList<QCameraFocusZone> zones = focus->focusZones();
#     foreach (QCameraFocusZone zone, zones) {
#         if (zone.status() == QCameraFocusZone::Focused) {
#             // Draw a green box at zone.area()
#         } else if (zone.status() == QCameraFocusZone::Selected) {
#             // This area is selected for autofocusing, but is not in focus
#             // Draw a yellow box at zone.area()
#         }
#     }

Enums露

FocusZoneStatus

Member	Value	Description
Focused	3	This zone is being used for autofocusing and is currently in focus.
Invalid	0	This zone is not valid
Selected	2	This zone is currently being used for autofocusing, but is not in focus.
Unused	1	This zone may be used for autofocusing, but is not currently.

Methods露

__init__(QCameraFocusZone): Creates a new QCameraFocusZone as a copy of other.

area() → QRectF

Returns the area of the camera frame that this focus zone encompasses.

Coordinates are in frame relative coordinates - QPointF(0,0) is the top left of the frame, and QPointF(1,1) is the bottom right.

__eq__(QCameraFocusZone) → bool: TODO

isValid() → bool: Returns true if this focus zone has a valid area and status.

__ne__(QCameraFocusZone) → bool: TODO

status() → FocusZoneStatus: Returns the current status of this focus zone.