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QCameraImageProcessing ClassThe QCameraImageProcessing class provides an interface for image processing related camera settings. More... #include <QCameraImageProcessing>Inherits: QObject. Public Types
Public Functions
Additional Inherited Members
Detailed DescriptionThe QCameraImageProcessing class provides an interface for image processing related camera settings. 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 object. 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. See also QCameraImageProcessingControl. Member Type Documentation
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| Constant | Value | Description |
|---|---|---|
| QCameraImageProcessing::WhiteBalanceAuto | 0 | Auto white balance mode. |
| QCameraImageProcessing::WhiteBalanceManual | 1 | Manual white balance. In this mode the white balance should be set with setManualWhiteBalance() |
| QCameraImageProcessing::WhiteBalanceSunlight | 2 | Sunlight white balance mode. |
| QCameraImageProcessing::WhiteBalanceCloudy | 3 | Cloudy white balance mode. |
| QCameraImageProcessing::WhiteBalanceShade | 4 | Shade white balance mode. |
| QCameraImageProcessing::WhiteBalanceTungsten | 5 | Tungsten (incandescent) white balance mode. |
| QCameraImageProcessing::WhiteBalanceFluorescent | 6 | Fluorescent white balance mode. |
| QCameraImageProcessing::WhiteBalanceFlash | 7 | Flash white balance mode. |
| QCameraImageProcessing::WhiteBalanceSunset | 8 | Sunset white balance mode. |
| QCameraImageProcessing::WhiteBalanceVendor | 1000 | Base value for vendor defined white balance modes. |
Member Function Documentation
qreal QCameraImageProcessing::contrast() const
Returns the contrast adjustment setting.
See also setContrast().
qreal QCameraImageProcessing::denoisingLevel() const
Returns the denoising adjustment level.
See also setDenoisingLevel().
bool QCameraImageProcessing::isAvailable() const
Returns true if image processing related settings are supported by this camera.
bool QCameraImageProcessing::isWhiteBalanceModeSupported(WhiteBalanceMode mode) const
Returns true if the white balance mode is supported.
qreal QCameraImageProcessing::manualWhiteBalance() const
Returns the current color temperature if the current white balance mode is WhiteBalanceManual. For other modes the return value is undefined.
See also setManualWhiteBalance().
qreal QCameraImageProcessing::saturation() const
Returns the saturation adjustment value.
See also setSaturation().
void QCameraImageProcessing::setContrast(qreal value)
Set the contrast adjustment to value.
Valid contrast adjustment values range between -1.0 and 1.0, with a default of 0.
See also contrast().
void QCameraImageProcessing::setDenoisingLevel(qreal level)
Sets the denoising adjustment level.
Valid sharpening 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.
See also denoisingLevel().
void QCameraImageProcessing::setManualWhiteBalance(qreal colorTemperature)
Sets manual white balance to colorTemperature. This is used when whiteBalanceMode() is set to WhiteBalanceManual. The units are Kelvin.
See also manualWhiteBalance().
void QCameraImageProcessing::setSaturation(qreal value)
Sets the saturation adjustment value to value.
Valid saturation values range between -1.0 and 1.0, with a default of 0.
See also saturation().
void QCameraImageProcessing::setSharpeningLevel(qreal level)
Sets the sharpening adjustment level.
Valid sharpening values range between -1.0 and 1.0, with a default of 0.
See also sharpeningLevel().
void QCameraImageProcessing::setWhiteBalanceMode(WhiteBalanceMode mode)
Sets the white balance to mode.
See also whiteBalanceMode().
qreal QCameraImageProcessing::sharpeningLevel() const
Returns the sharpening adjustment level.
See also setSharpeningLevel().
WhiteBalanceMode QCameraImageProcessing::whiteBalanceMode() const
Returns the white balance mode being used.
See also setWhiteBalanceMode().