android.hardware.camera2.CaptureRequest可以与OpenCV一起使用吗?

时间:2017-02-14 12:15:19

标签: android opencv android-camera opencv4android

我已经为此工作了好几天了。我有一个基于OpenCV / JavaCameraView的项目我试图与我用来控制相机对光的敏感度的Android android.hardware.camera2.CaptureRequest对象集成。

CameraBridgeViewBase.CvCameraViewListener2/JavaCameraView项目有效(我可以在屏幕上看到图像),CaptureRequest项目也可以工作(也见到这一点),但是将这两种技术结合在一个项目中证明了大问题。

有没有人让这两种技术一起工作?我的目标是让摄像头处于CaptureRequest(有限的SENSOR_SENSITIVITY + SENSOR_EXPOSURE_TIME)的控制之下,但是屏幕上显示的是通过OpenCV共享库过滤的流式图像。

要控制相机,我可以使用以下内容:

        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();
                        }
                    }

要过滤图像流,我可以使用以下内容:

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;
}

提前致谢。

3 个答案:

答案 0 :(得分:4)

请查看Android的开放式简历的实施情况,它可能对您有帮助。

Camera calibration With OpenCV

相机校准 - 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

答案 1 :(得分:0)

我相信OpenCV本身不支持与android.camera2一起使用

答案 2 :(得分:0)

答案是否定的,OpenCV不能与android.camera2一起工作,不是没有某种复杂的工作。