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# calib3d module. Camera calibration and 3D reconstruction

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.

- | Title: Camera calibration with square chessboard Compatibility: > OpenCV 2.0 Author: Victor Eruhimov You will use some chessboard images to calibrate your camera.

- | Title: Camera calibration With OpenCV 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.

- | Title: Real Time pose estimation of a textured object 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.

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