Camera calibration and 3D reconstruction (calib3d module) {#tutorial_table_of_content_calib3d}
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Although we got most of our images in a 2D format they do come from a 3D world. Here you will learn
how to find out from the 2D images information about the 3D world.

-   @subpage tutorial_camera_calibration_square_chess

    *Compatibility:* \> OpenCV 2.0

    *Author:* Victor Eruhimov

    You will use some chessboard images to calibrate your camera.

-   @subpage tutorial_camera_calibration

    *Compatibility:* \> OpenCV 2.0

    *Author:* Bernát Gábor

    Camera calibration by using either the chessboard, circle or the asymmetrical circle
    pattern. Get the images either from a camera attached, a video file or from an image
    collection.

-   @subpage tutorial_real_time_pose

    *Compatibility:* \> OpenCV 2.0

    *Author:* Edgar Riba

    Real time pose estimation of a textured object using ORB features, FlannBased matcher, PnP
    approach plus Ransac and Linear Kalman Filter to reject possible bad poses.
