QCameraFocusZone ¶

概要 ¶

详细描述 ¶

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 实例。

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);
const QList<QCameraFocusZone> zones = focus->focusZones();
for (const 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()
    }
}
											

另请参阅

QCameraFocus

class QCameraFocusZone ¶

QCameraFocusZone(other)

QCameraFocusZone(area[, status=Selected])

param area

QRectF

param status

FocusZoneStatus

param other

QCameraFocusZone

Creates a new, empty QCameraFocusZone .

创建新 QCameraFocusZone as a copy of other .

创建新 QCameraFocusZone with the supplied area and status .

PySide2.QtMultimedia.QCameraFocusZone. FocusZoneStatus ¶

常量	描述
QCameraFocusZone.Invalid	This zone is not valid
QCameraFocusZone.Unused	This zone may be used for autofocusing, but is not currently.
QCameraFocusZone.Selected	This zone is currently being used for autofocusing, but is not in focus.
QCameraFocusZone.Focused	This zone is being used for autofocusing and is currently in focus.

PySide2.QtMultimedia.QCameraFocusZone. area ( ) ¶

返回类型

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.

PySide2.QtMultimedia.QCameraFocusZone. isValid ( ) ¶

返回类型

bool

Returns true if this focus zone has a valid area and status.

PySide2.QtMultimedia.QCameraFocusZone. __ne__ ( other ) ¶

参数

other – QCameraFocusZone

返回类型

bool

Returns true if this focus zone is not the same as other .

PySide2.QtMultimedia.QCameraFocusZone. __eq__ ( other ) ¶

参数

other – QCameraFocusZone

返回类型

bool

Returns true if this focus zone is the same as other .

PySide2.QtMultimedia.QCameraFocusZone. setStatus ( status ) ¶

参数

status – FocusZoneStatus

Sets the current status of this focus zone to status .

另请参阅

status()

PySide2.QtMultimedia.QCameraFocusZone. status ( ) ¶

返回类型

FocusZoneStatus

Returns the current status of this focus zone.