![]() ![]() The mask is then tracked over several frames until it beginsto move off the left-hand edge of the screen. Note that the actual mask vertex positionscan be edited manually when tracking in order to adapt to imagecontent, so if part of the planar surface becomes occluded or movesout of frame, tracking can be stopped and the mask vertices can beupdated before tracking continues.This is illustrated in the following two images: the first imageshows the initial position of the mask covering the front of thebuilding. A continuous set of frames in which thatplanar surface is visible). Care should also be taken toensure that the mask in/out points are correct and the mask is onlyvisible in the frames in which the planar surface can be seen.Each mask must be placed over a planar surface and tracked over asmany frames as possible (i.e. To ensure the most accurate results, it oftenhelps to switch off the Incremental Tracking mode in the node, and use Planar Perspective tracking if possible. Either a rotomask (or rectangle, ellipse or lasso) or an X-Spline mask should beused for this purpose. Usage Tracking the cameraSolving for camera motion using planar surfaces is performed byfirst tracking one or more masks throughout the clip. The node cantrack both a freely moving camera or one that is only rotating aroundits centre as well as cameras with a varying focal length.The node can also be used to edit the camera path manually ifdesired, and position the ground plane at a suitable location. The Planar Camera Solver node can be used to track the camera pathfor simple shots containing one or more planar surfaces. ![]()
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