MOTION TRACKING USING IMAGE-TEXTURE TEMPLATES

摘要

Image templates are extracted from video images in real-time and stored in memory. Templates are selected on the basis of their ability to provide useful positional data, via position locator (2), and compared with regions of subsequent images to find the position giving the best match. From the position data, a transform model calculator (3) calculates a transform model. The tracking controller (1) tracks the background motion in the current image to accurately determine the motion and attitude of the camera recording the current image. A transform model confirmer (4) confirms the transform model by examining predefined image templates. Transform model data and camera sensor data are then used to insert images into the live video broadcast at the desired location in the correct perspective. Block updater (5) periodically updates stored templates to purge those that no longer give valid or significant positional data. New templates extracted from recent images are used to replace the discarded templates.