Calibration, pose and novel views from single images of constrained scenes

We exploit the common constraint of having a right angle corner of two rectangular planes in the scene in order to calibrate a perspective projection camera and compute its pose relative to the coordinate system defined by the corner. No metric information about the corner is assumed. The camera is constrained to have its image x and y axis to be orthogonal with the same scale factor, which is valid for most real world cameras. We then reproject the image of the corner to an arbitrary viewpoint. We can also compute the metric properties of the scene up to scale. We report experimental results with subjectively acceptable quality. The approach shows the power of exploiting constraints that are abundant in typical architectural scenes.