Question

我正在为一个研究项目编写一个数据收集应用程序，它使用新的Camera2 API静静地拍照，而不显示预览。问题是所有的照片都严重曝光不足，通常是全黑的，房间特征的轮廓微弱。这尤其是一个问题，因为我的用例涉及拍摄室内环境的照片。这是我的捕获代码：

private void setupCamera(){
    assert mCamera != null;
    Log.d("Camera Status", "setting up...");
    ArrayList<Surface> s = new ArrayList<Surface>();
    assert mSurface != null;
    try {
        CaptureRequest.Builder builder = mCamera.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
        builder.addTarget(mSurface);
        builder.set(CaptureRequest.CONTROL_AE_LOCK, false);
        builder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER, CameraMetadata.CONTROL_AE_PRECAPTURE_TRIGGER_START);
        builder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_ON);
        builder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_START);
        builder.set(CaptureRequest.CONTROL_AF_MODE, CameraMetadata.CONTROL_AF_MODE_AUTO);
        builder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
        builder.set(CaptureRequest.CONTROL_AE_EXPOSURE_COMPENSATION, 6);

        final CaptureRequest request = builder.build();
        s.add(mSurface);
        Log.d("Camera Status", "Creating Capture Session...");
        mCamera.createCaptureSession(s, new CameraCaptureSession.StateCallback() {
            @Override
            public void onConfigured(CameraCaptureSession session) {
                try {
                    Log.d("AE PRECAPTURE TRIGGER", request.get(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER) + "");

                    session.capture(request, new CameraCaptureSession.CaptureCallback() {
                        @Override
                        public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) {

                            super.onCaptureCompleted(session, request, result);
                            context.updateStatus("Capture Successful");
                            Log.d("Capture Result", "Success");
                            mCamera.close();

                        }

                        @Override
                        public void onCaptureFailed(CameraCaptureSession session, CaptureRequest request, CaptureFailure failure) {
                            super.onCaptureFailed(session, request, failure);
                            Log.d("Capture Result", "Failure");
                            context.updateStatus("Capture Failed");
                        }
                    }, context.handler);
                } catch (CameraAccessException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void onConfigureFailed(CameraCaptureSession session) {

            }
        }, context.handler);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }

}

任何帮助将不胜感激！感谢

使用Android Camera2 API进行黑暗，曝光不足的照片

0 个答案: