Patent ID: 9554081
Date: 2017-01-24
CPC Classifications: G06K,H04N

Claim:
1. A video access system for generating a description of the video segment based on a predetermined set of action describing rules, each rule associated with a respective action type from a predetermined set of detectable action types, each of the rules in the set defining at least one role in the action, and based on predetermined conditions defined for the rules, for computing score values dependent on the attribute values of an object or objects assigned to the at least one role, the system comprising an action type detector coupled to a source of video data; an object detector coupled to the source of video data; a description generator coupled to the action type detector and the object detector, and configured to select a rule dependent on an action type detected from the video data for a video segment by the action type detector, the rule being selected from a predetermined set of rules; assign detected objects, which have been detected from the video data for a video segment by the object detector, to the at least role of the selected rule; compute score values for assignments of different detected objects to the role, each score value being computed dependent on the attribute values of the assigned object according to the predetermined conditions defined for the rule; select a combination of the detected action type and at least one assigned detected objects on the basis of the score values; generate a description of the video segment from the selected combination; wherein the description generator is configured to compute score values as a function of score values generated for the action type by the action type detector and/or for the detected object by the object detector; and wherein the description generator is configured to compute score values according to wherein the sum is taken over one or more conditions defined by the selected rule, “i” indexing the conditions, w0 and w(i) being predetermined weight factors, R(A,t) being a score value for an action type A at time t generated by the action type detector, R(condition, t(i)) being a score value or score values generated by the object detector for attribute values that are defined by the rule.