Applied '@ref' linking for 3.4 Calib3D parameters and added enum...

Applied '@ref' linking for 3.4 Calib3D parameters and added enum cv::fisheye::CALIB_ZERO_DISPARITY == cv::CALIB_ZERO_DISPARITY == 0x400 == 1 << 10.
Fisheye test has been updated to use new enum cv::fisheye::CALIB_ZERO_DISPARITY and included CV_StaticAssert(...) to ensure cv::CALIB_ZERO_DISPARITY == cv::fisheye::CALIB_ZERO_DISPARITY.

modules/calib3d/test/test_fisheye.cpp

@@ -390,6 +390,12 @@ TEST_F(fisheyeTest, EstimateUncertainties)
 
 TEST_F(fisheyeTest, stereoRectify)
 {
+    // For consistency purposes
+    CV_StaticAssert(
+        static_cast<int>(cv::CALIB_ZERO_DISPARITY) == static_cast<int>(cv::fisheye::CALIB_ZERO_DISPARITY),
+        "For the purpose of continuity the following should be true: cv::CALIB_ZERO_DISPARITY == cv::fisheye::CALIB_ZERO_DISPARITY"
+    );
+
     const std::string folder =combine(datasets_repository_path, "calib-3_stereo_from_JY");
 
     cv::Size calibration_size = this->imageSize, requested_size = calibration_size;
@@ -402,7 +408,7 @@ TEST_F(fisheyeTest, stereoRectify)
     double balance = 0.0, fov_scale = 1.1;
     cv::Mat R1, R2, P1, P2, Q;
     cv::fisheye::stereoRectify(K1, D1, K2, D2, calibration_size, theR, theT, R1, R2, P1, P2, Q,
-                      cv::CALIB_ZERO_DISPARITY, requested_size, balance, fov_scale);
+                      cv::fisheye::CALIB_ZERO_DISPARITY, requested_size, balance, fov_scale);
 
     // Collected with these CMake flags: -DWITH_IPP=OFF -DCV_ENABLE_INTRINSICS=OFF -DCV_DISABLE_OPTIMIZATION=ON -DCMAKE_BUILD_TYPE=Debug
     cv::Matx33d R1_ref(