KITTI dataset from the `2012 stereo evaluation benchmark <http://www.cvlibs.net/datasets/kitti/eval_stereo_flow.php>`_.
    Uses the RGB images for consistency with KITTI 2015.

    The dataset is expected to have the following structure: ::

        root
            Kitti2012
                testing
                    colored_0
                        1_10.png
                        2_10.png
                        ...
                    colored_1
                        1_10.png
                        2_10.png
                        ...
                training
                    colored_0
                        1_10.png
                        2_10.png
                        ...
                    colored_1
                        1_10.png
                        2_10.png
                        ...
                    disp_noc
                        1.png
                        2.png
                        ...
                    calib

    Args:
        root (string): Root directory where `Kitti2012` is located.
        split (string, optional): The dataset split of scenes, either "train" (default) or "test".
        transforms (callable, optional): A function/transform that takes in a sample and returns a transformed version.
    T