QCameraImageProcessing ¶

QCameraImageProcessing class provides an interface for image processing related camera settings. 更多 …

概要 ¶

函数 ¶

def brightness ()
def colorFilter ()
def contrast ()
def denoisingLevel ()
def isAvailable ()
def isColorFilterSupported (filter)
def isWhiteBalanceModeSupported (mode)
def manualWhiteBalance ()
def saturation ()
def setBrightness (value)
def setColorFilter (filter)
def setContrast (value)
def setDenoisingLevel (value)
def setManualWhiteBalance (colorTemperature)
def setSaturation (value)
def setSharpeningLevel (value)
def setWhiteBalanceMode (mode)
def sharpeningLevel ()
def whiteBalanceMode ()

详细描述 ¶

After capturing the data for a camera frame, the camera hardware and software performs various image processing tasks to produce a final image. This includes compensating for ambient light color, reducing noise, as well as making some other adjustments to the image.

You can retrieve this class from an instance of a QCamera 对象。

For example, you can set the white balance (or color temperature) used for processing images:
camera = new QCamera;
QCameraImageProcessing *imageProcessing = camera->imageProcessing();
if (imageProcessing->isAvailable()) {
    imageProcessing->setWhiteBalanceMode(QCameraImageProcessing::WhiteBalanceFluorescent);
}
											
Or adjust the amount of denoising performed:
imageProcessing->setDenoisingLevel(-0.3); //reduce the amount of denoising applied
											
In some cases changing these settings may result in a longer delay before an image is ready.

For more information on image processing of camera frames, see Camera Image Processing .

另请参阅

QCameraImageProcessingControl

PySide2.QtMultimedia.QCameraImageProcessing. WhiteBalanceMode ¶

常量	描述
QCameraImageProcessing.WhiteBalanceAuto	Auto white balance mode.
QCameraImageProcessing.WhiteBalanceManual	Manual white balance. In this mode the white balance should be set with `setManualWhiteBalance()`
QCameraImageProcessing.WhiteBalanceSunlight	Sunlight white balance mode.
QCameraImageProcessing.WhiteBalanceCloudy	Cloudy white balance mode.
QCameraImageProcessing.WhiteBalanceShade	Shade white balance mode.
QCameraImageProcessing.WhiteBalanceTungsten	Tungsten (incandescent) white balance mode.
QCameraImageProcessing.WhiteBalanceFluorescent	Fluorescent white balance mode.
QCameraImageProcessing.WhiteBalanceFlash	Flash white balance mode.
QCameraImageProcessing.WhiteBalanceSunset	Sunset white balance mode.
QCameraImageProcessing.WhiteBalanceVendor	Base value for vendor defined white balance modes.

PySide2.QtMultimedia.QCameraImageProcessing. ColorFilter ¶

常量	描述
QCameraImageProcessing.ColorFilterNone	No filter is applied to images.
QCameraImageProcessing.ColorFilterGrayscale	A grayscale filter.
QCameraImageProcessing.ColorFilterNegative	A negative filter.
QCameraImageProcessing.ColorFilterSolarize	A solarize filter.
QCameraImageProcessing.ColorFilterSepia	A sepia filter.
QCameraImageProcessing.ColorFilterPosterize	A posterize filter.
QCameraImageProcessing.ColorFilterWhiteboard	A whiteboard filter.
QCameraImageProcessing.ColorFilterBlackboard	A blackboard filter.
QCameraImageProcessing.ColorFilterAqua	An aqua filter.
QCameraImageProcessing.ColorFilterVendor	The base value for vendor defined filters.

PySide2.QtMultimedia.QCameraImageProcessing. brightness ( ) ¶

返回类型: qreal

Returns the brightness adjustment setting.

另请参阅

setBrightness()

PySide2.QtMultimedia.QCameraImageProcessing. colorFilter ( ) ¶

返回类型: ColorFilter

Returns the color filter which will be applied to image data captured by the camera.

另请参阅

setColorFilter()

PySide2.QtMultimedia.QCameraImageProcessing. contrast ( ) ¶

返回类型: qreal

Returns the contrast adjustment setting.

另请参阅

setContrast()

PySide2.QtMultimedia.QCameraImageProcessing. denoisingLevel ( ) ¶

返回类型: qreal

Returns the denoising adjustment level.

另请参阅

setDenoisingLevel()

PySide2.QtMultimedia.QCameraImageProcessing. isAvailable ( ) ¶

返回类型: bool

Returns true if image processing related settings are supported by this camera.

PySide2.QtMultimedia.QCameraImageProcessing. isColorFilterSupported ( filter ) ¶

参数: filter – ColorFilter
返回类型: bool

Returns true if a color filter is supported.

PySide2.QtMultimedia.QCameraImageProcessing. isWhiteBalanceModeSupported ( mode ) ¶

参数: mode – WhiteBalanceMode
返回类型: bool

Returns true if the white balance mode is supported.

PySide2.QtMultimedia.QCameraImageProcessing. manualWhiteBalance ( ) ¶

返回类型: qreal

Returns the current color temperature if the current white balance mode is WhiteBalanceManual . For other modes the return value is undefined.

另请参阅

setManualWhiteBalance()

PySide2.QtMultimedia.QCameraImageProcessing. saturation ( ) ¶

返回类型: qreal

Returns the saturation adjustment value.

另请参阅

setSaturation()

PySide2.QtMultimedia.QCameraImageProcessing. setBrightness ( value ) ¶

参数: value – qreal

Set the brightness adjustment to value .

Valid brightness adjustment values range between -1.0 and 1.0, with a default of 0.

另请参阅

brightness()

PySide2.QtMultimedia.QCameraImageProcessing. setColorFilter ( filter ) ¶

参数: filter – ColorFilter

Sets the color filter which will be applied to image data captured by the camera.

另请参阅

colorFilter()

PySide2.QtMultimedia.QCameraImageProcessing. setContrast ( value ) ¶

参数: value – qreal

Set the contrast adjustment to value .

Valid contrast adjustment values range between -1.0 and 1.0, with a default of 0.

另请参阅

contrast()

PySide2.QtMultimedia.QCameraImageProcessing. setDenoisingLevel ( value ) ¶

参数: value – qreal

Sets the denoising adjustment level .

Valid denoising values range between -1.0 and 1.0, with a default of 0.

If the parameter value is set to 0, the amount of denoising applied is selected by camera and depends on camera capabilities and settings. Changing value in -1.0..1.0 range adjusts the amount of denoising applied within the supported range.

另请参阅

denoisingLevel()

PySide2.QtMultimedia.QCameraImageProcessing. setManualWhiteBalance ( colorTemperature ) ¶