calib-stereo.cpp: Use Mat for T

[blazczak]

In calib-stereo.cpp you're using Vec3d to store and then write the contents of vector T. opencv does not store metadata about the type of the container for Vec3d as it does for Mat, so users may get errors on cvRead because opencv won't be able to tell the type of the node. Ideally, you would want to specify Mat as T's type on the reader side just like the other calibration params and rely on simple fs["T"] >> T; working seamlessly on the reader side.

diff --git calib_stereo.cpp calib_stereo.cpp
index 5adb9f1..15d7aea 100644
--- calib_stereo.cpp
+++ calib_stereo.cpp
@@ -118,9 +118,7 @@ int main(int argc, char const *argv[])
                    leftimg_dir, rightimg_dir, leftimg_filename, rightimg_filename, extension);
 
   printf("Starting Calibration\n");
-  Mat K1, K2, R, F, E;
-  Vec3d T;
-  Mat D1, D2;
+  Mat K1, K2, D1, D2, R, T, F, E;
   fsl["K"] >> K1;
   fsr["K"] >> K2;
   fsl["D"] >> D1;