The QCameraImageProcessing class provides an interface for image processing related camera settings. More...
| Header: | #include <QCameraImageProcessing> |
| qmake: | QT += multimedia |
| Inherits: | QObject |
| enum | ColorFilter { ColorFilterNone, ColorFilterGrayscale, ColorFilterNegative, ColorFilterSolarize, ..., ColorFilterVendor } |
| enum | WhiteBalanceMode { WhiteBalanceAuto, WhiteBalanceManual, WhiteBalanceSunlight, WhiteBalanceCloudy, ..., WhiteBalanceVendor } |
| qreal | brightness() const |
| QCameraImageProcessing::ColorFilter | colorFilter() const |
| qreal | contrast() const |
| qreal | denoisingLevel() const |
| bool | isAvailable() const |
| bool | isColorFilterSupported(QCameraImageProcessing::ColorFilter filter) const |
| bool | isWhiteBalanceModeSupported(QCameraImageProcessing::WhiteBalanceMode mode) const |
| qreal | manualWhiteBalance() const |
| qreal | saturation() const |
| void | setBrightness(qreal value) |
| void | setColorFilter(QCameraImageProcessing::ColorFilter filter) |
| void | setContrast(qreal value) |
| void | setDenoisingLevel(qreal level) |
| void | setManualWhiteBalance(qreal colorTemperature) |
| void | setSaturation(qreal value) |
| void | setSharpeningLevel(qreal level) |
| void | setWhiteBalanceMode(QCameraImageProcessing::WhiteBalanceMode mode) |
| qreal | sharpeningLevel() const |
| QCameraImageProcessing::WhiteBalanceMode | whiteBalanceMode() const |
The 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.
| Constant | Value | Description |
|---|---|---|
QCameraImageProcessing::ColorFilterNone |
0 |
No filter is applied to images. |
QCameraImageProcessing::ColorFilterGrayscale |
1 |
A grayscale filter. |
QCameraImageProcessing::ColorFilterNegative |
2 |
A negative filter. |
QCameraImageProcessing::ColorFilterSolarize |
3 |
A solarize filter. |
QCameraImageProcessing::ColorFilterSepia |
4 |
A sepia filter. |
QCameraImageProcessing::ColorFilterPosterize |
5 |
A posterize filter. |
QCameraImageProcessing::ColorFilterWhiteboard |
6 |
A whiteboard filter. |
QCameraImageProcessing::ColorFilterBlackboard |
7 |
A blackboard filter. |
QCameraImageProcessing::ColorFilterAqua |
8 |
An aqua filter. |
QCameraImageProcessing::ColorFilterVendor |
1000 |
The base value for vendor defined filters. |
This enum was introduced or modified in Qt 5.5.
| 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. |
Returns the brightness adjustment setting.
See also setBrightness().
Returns the color filter which will be applied to image data captured by the camera.
This function was introduced in Qt 5.5.
See also setColorFilter().
Returns the contrast adjustment setting.
See also setContrast().
Returns the denoising adjustment level.
See also setDenoisingLevel().
Returns true if image processing related settings are supported by this camera.
Returns true if a color filter is supported.
This function was introduced in Qt 5.5.
Returns true if the white balance mode is supported.
Returns the current color temperature if the current white balance mode is WhiteBalanceManual. For other modes the return value is undefined.
See also setManualWhiteBalance().
Returns the saturation adjustment value.
See also setSaturation().
Set the brightness adjustment to value.
Valid brightness adjustment values range between -1.0 and 1.0, with a default of 0.
See also brightness().
Sets the color filter which will be applied to image data captured by the camera.
This function was introduced in Qt 5.5.
See also colorFilter().
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().
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.
See also denoisingLevel().
Sets manual white balance to colorTemperature. This is used when whiteBalanceMode() is set to WhiteBalanceManual. The units are Kelvin.
See also manualWhiteBalance().
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().
Sets the sharpening adjustment level.
Valid sharpening values range between -1.0 and 1.0, with a default of 0.
See also sharpeningLevel().
Sets the white balance to mode.
See also whiteBalanceMode().
Returns the sharpening adjustment level.
See also setSharpeningLevel().
Returns the white balance mode being used.
See also setWhiteBalanceMode().
