METHOD FOR ESTIMATING A TIMESTAMP IN A VIDEO STREAM AND METHOD OF AUGMENTING A VIDEO STREAM WITH INFORMATION

摘要

The invention discloses a method for determining a timestamp t of an image of a video stream V(t) comprising a plurality of images, said method comprising the following steps:- receiving a plurality of original image descriptors at an monitoring unit, wherein each original image descriptor is associated to an image in the original video stream and wherein the original image descriptors are generated during preparation phase;- displaying the original video stream V(t) on a display device during a display phase;- acquiring an acquired video stream by an acquisition device of the monitoring unit by acquiring images Si of the display device on which the original video stream V(t) is displayed;- determining an acquired image descriptor of at least one of a plurality of acquired images Si of the acquired video stream during the display phase;- determining a similarity level of an original image descriptor and the acquired image descriptor; andif the similarity level of the original image descriptor and the acquired image descriptor fulfills at least one criterion, determining the timestamp t of the original image descriptor and assigning the timestamp t to the acquired image corresponding to the acquired image descriptor as an estimated timestamp T. Augmented information can be displayed in the depending on the time stamp.