Fixes#3045
For the pose estimation example, the camera parameters are required. To work with examples from the tutorial, default camera parameters were added:

Size imgSize = inputImage.size();cameraMatrix = Mat::eye(3, 3, CV_64FC1);cameraMatrix.at<double>(0, 0) = cameraMatrix.at<double>(1, 1) = 650;cameraMatrix.at<double>(0, 2) = imgSize.width / 2;cameraMatrix.at<double>(1, 2) = imgSize.height / 2;distCoeffs = Mat(5, 1, CV_64FC1, Scalar::all(0));

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