I want to crop a selected a rectangle area in live video feed and save those area or image in my local drive
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You have any example
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Hi
The docs for rubberband shows how to use it.copy just returns copy
so its just
QPixmap area=orgpix->copy ( rect from rubberband );
you can see here
https://stackoverflow.com/questions/7010611/how-can-i-crop-an-image-in-qtfor the video part , this might help
http://omg-it.works/how-to-grab-video-frames-directly-from-qcamera/#acceptLicense -
Hi
QRect rect(10, 20, 30, 40);
QPixmap original('image.png');
QPixmap cropped = original.copy(rect);
the following code is working on image how i can put video in place of image -
Hi
QRect rect(10, 20, 30, 40);
QPixmap original('image.png');
QPixmap cropped = original.copy(rect);
the following code is working on image how i can put video in place of image@robotsandi
Is it from a camera? -
i am also able to stop the camera and can i store that image in buffer to use those image.
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i am also able to stop the camera and can i store that image in buffer to use those image.
@robotsandi
Ok if you already can grab images, you simply load it with full path from where you store it
or simply display it in QLabel ( as pixmap) and use rubberband to grab the area. ( or fixed in code if only needing that)
Or if you can just stop the video and it still displays last image, then directly on that. -
@robotsandi
Ok if you already can grab images, you simply load it with full path from where you store it
or simply display it in QLabel ( as pixmap) and use rubberband to grab the area. ( or fixed in code if only needing that)
Or if you can just stop the video and it still displays last image, then directly on that.@mrjj
yes, i just stop the video and it still displays the last image,
but how can i directly itvoid MainWindow::on_pushButton_clicked()
{
mCamera->setViewfinder(mCameraViewfinder);
mLayout->addWidget(mCameraViewfinder);
mLayout->setMargin(0);
ui->scrollArea->setLayout(mLayout);
mCamera->start();
}void MainWindow::on_pushButton_2_clicked()
{
mCamera->stop();
} -
@mrjj
yes, i just stop the video and it still displays the last image,
but how can i directly itvoid MainWindow::on_pushButton_clicked()
{
mCamera->setViewfinder(mCameraViewfinder);
mLayout->addWidget(mCameraViewfinder);
mLayout->setMargin(0);
ui->scrollArea->setLayout(mLayout);
mCamera->start();
}void MainWindow::on_pushButton_2_clicked()
{
mCamera->stop();
} -
@mrjj Plese help me.
@robotsandi
well i dont know for sure.
I think you have to use a
http://doc.qt.io/qt-5/qcameraimagecapture.html#details
to get an image.
But why not just copy from what ever is on screen ?
Do you also need image first? -
@robotsandi
well i dont know for sure.
I think you have to use a
http://doc.qt.io/qt-5/qcameraimagecapture.html#details
to get an image.
But why not just copy from what ever is on screen ?
Do you also need image first? -
@mrjj
mCamera->setCaptureMode(QCameraImageCapture::CaptureToBuffer);
how to stope image to use this codeHi
I think you just connect image capture to it
imageCapture = new QCameraImageCapture(camera);
and hook up to
http://doc.qt.io/qt-5/qcameraimagecapture.html#imageCaptured
to get signal and image when its ready -
Hi
maybe this sample is good start ?
http://doc.qt.io/qt-5/qtmultimedia-multimediawidgets-camera-example.htmlIt can grab photo.
-
Hi
I think you just connect image capture to it
imageCapture = new QCameraImageCapture(camera);
and hook up to
http://doc.qt.io/qt-5/qcameraimagecapture.html#imageCaptured
to get signal and image when its ready -
@mrjj
Hi
I have 4 coordinate (x1, y1, x2, y2)
(x1, y1) is for press mouse button or (x2, y2) for release mouse button
how can i fine height and weight.
please, can you explain me:@robotsandi
Well you can just cheat
QRect area( x1,y1,x2,y2 ) ;
( or as QPoint if you have that QRect area( p1, p2 ) )
then you can just ask itarea.width()
area.height()else its
int w= x2 - x1;
int h=y2-y1; -
@robotsandi
Well you can just cheat
QRect area( x1,y1,x2,y2 ) ;
( or as QPoint if you have that QRect area( p1, p2 ) )
then you can just ask itarea.width()
area.height()else its
int w= x2 - x1;
int h=y2-y1;@mrjj
How to save image
int width = x2-x1;
int height = y2-y1;
QPixmap original("mCameraImageCapture");
//QPixmap cropped = original.copy(rect);
QPixmap cropped = original.copy(x1, y1, width, height); -
@mrjj
How to save image
int width = x2-x1;
int height = y2-y1;
QPixmap original("mCameraImageCapture");
//QPixmap cropped = original.copy(rect);
QPixmap cropped = original.copy(x1, y1, width, height);@robotsandi
mCameraImageCapture->setCaptureDestination(QCameraImageCapture::CaptureToBuffer);
QImageEncoderSettings imageEncoderSettings;
imageEncoderSettings.setCodec("imag/jpeg");
imageEncoderSettings.setResolution(1600,1200);
mCameraImageCapture->setEncodingSettings(imageEncoderSettings); -
@robotsandi
mCameraImageCapture->setCaptureDestination(QCameraImageCapture::CaptureToBuffer);
QImageEncoderSettings imageEncoderSettings;
imageEncoderSettings.setCodec("imag/jpeg");
imageEncoderSettings.setResolution(1600,1200);
mCameraImageCapture->setEncodingSettings(imageEncoderSettings);.setCodec("imag/jpeg");
Is that correct?
Seems to miss an e -
@mrjj
yes this is correct -
@mrjj
yes this is correct@robotsandi
Is that correct
mCameraImageCapture->setCaptureDestination(QCameraImageCapture::CaptureToBuffer);
to mCameraImage Capture is store image in buffer?? -
@robotsandi
Is that correct
mCameraImageCapture->setCaptureDestination(QCameraImageCapture::CaptureToBuffer);
to mCameraImage Capture is store image in buffer??@robotsandi
QPixmap original("mCameraImageCapture");
QPixmap cropped = original.copy(x1, y1, width, height);
cropped.save(filename);
is pic is not save
