I've worked on this for days now. I have an OpenCV/JavaCameraView-based project I am trying to integrate with an Android android.hardware.camera2.CaptureRequest
object I use to control the camera's sensitivity to light.
The CameraBridgeViewBase.CvCameraViewListener2/JavaCameraView
project works (I can see an image on the screen), and the CaptureRequest
project works (see this, too), but combining the two technologies in a single project has proved a big problem.
Has anyone gotten these two technologies to work together? My goal is to have the camera under the control of the CaptureRequest (limited SENSOR_SENSITIVITY + SENSOR_EXPOSURE_TIME), but for the screen to show a streaming image filtered through an OpenCV shared library I've written.
To control the camera, I can use something like this:
mCameraDevice.createCaptureSession(Arrays.asList(surface, mImageReader.getSurface()),
new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
// The camera is already closed
if (null == mCameraDevice) {
return;
}
long exposureTime = 66259688,frameDuration = 1000;
int sensitivity = 1512;
mCaptureSession = cameraCaptureSession;
try {
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE,
CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
setAutoFlash(mPreviewRequestBuilder);
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_OFF);
mPreviewRequestBuilder.set(CaptureRequest.SENSOR_EXPOSURE_TIME, Long.valueOf(exposureTime));
mPreviewRequestBuilder.set(CaptureRequest.SENSOR_SENSITIVITY, Integer.valueOf(sensitivity));
mPreviewRequestBuilder.set(CaptureRequest.SENSOR_FRAME_DURATION, Long.valueOf(frameDuration));
mPreviewRequest = mPreviewRequestBuilder.build();
mCaptureSession.setRepeatingRequest(mPreviewRequest,
mCaptureCallback, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}
}
To filter the image stream, I can use something like this:
public class MyCoolScanner extends AppCompatActivity implements CameraBridgeViewBase.CvCameraViewListener2 {
...
@Override
public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {
mRgba = inputFrame.rgba();
OpenCVNative.myCoolLibrary(mRgba.getNativeObjAddr(),mGray.getNativeObjAddr());
return mGray;
}
Thanks in advance.
Please find implementation of open CV with Android , it may help you .
Camera calibration With OpenCV
Camera calibration - opencv 2.3.1 android
https://groups.google.com/forum/#!topic/android-opencv/xXtUvdA1E4M
https://fossies.org/dox/opencv-3.2.0/CameraCalibrationActivity_8java_source.html
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