41
Ajay Divakaran, Regunathan Radhakrishnan: Unusual event detection using motion activity descriptors. Mitsubishi Electric Research Laboratories, Dirk Brinkman, Andrew J Curtin, November 23, 2004: US06823011 (3 worldwide citation)

A method detects an unusual event in a video. Motion vectors are extracted from each frame in a video acquired by a camera of a scene. Zero run-length parameters are determined for each frame from the motion vectors. The zero run-length parameters are summed over predetermined time intervals of the ...


42
Hui Cheng, Harpreet Singh Sawhney, Ajay Divakaran, Qian Yu, Jingen Liu, Amir Tamrakar, Saad Ali, Omar Javed: Classification, search, and retrieval of complex video events. SRI INTERNATIONAL, Barnes & Thornburg, Thomas J McWilliams, Edward F Behm Jr, January 26, 2016: US09244924 (2 worldwide citation)

A complex video event classification, search and retrieval system can generate a semantic representation of a video or of segments within the video, based on one or more complex events that are depicted in the video, without the need for manual tagging. The system can use the semantic representation ...


43
Ajay Divakaran, Qian Yu, Amir Tamrakar, Harpreet Singh Sawhney, Jiejie Zhu, Omar Javed, Jingen Liu, Hui Cheng, Jayakrishnan Eledath: Real-time object detection, tracking and occlusion reasoning. SRI International, Moser Taboada, February 27, 2018: US09904852 (2 worldwide citation)

A system for object detection and tracking includes technologies to, among other things, detect and track moving objects, such as pedestrians and/or vehicles, in a real-world environment, handle static and dynamic occlusions, and continue tracking moving objects across the fields of view of multiple ...


44
Regunathan Radhakrishnan, Michael Siracusa, Ajay Divakaran: Task specific audio classification for identifying video highlights. Mitsubishi Electric Research Laboratories, Dirk Brinkman, Gene Vinokur, July 7, 2009: US07558809 (2 worldwide citation)

A method classifies segments of a video using an audio signal of the video and a set of classes. Selected classes of the set are combined as a subset of important classes, the subset of important classes being important for a specific highlighting task, the remaining classes of the set are combined ...


45
Ajay Divakaran: Pattern discovery in video content using association rules on multiple sets of labels. Mitsubishi Electric Research Laboratories, Dirk Brinkman, Clifton D Mueller, Gene V Vinokur, December 4, 2007: US07305133 (2 worldwide citation)

A method discovers patterns in unknown content of a video. The video is partitioned into sets of disjoint segments. Each set includes all frames of the video, and each set is partitioned according to a selected low-level feature of the video. The disjoint segments are grouped into corresponding sets ...


46
Raia Hadsell, Supun Samarasekera, Ajay Divakaran: Audio based robot control and navigation. SRI International, Moser Taboada, September 10, 2013: US08532863 (1 worldwide citation)

A computer implemented method for unattended detection of a current terrain to be traversed by a mobile device is disclosed. Visual input of the current terrain is received for a plurality of positions. Audio input corresponding to the current terrain is received for the plurality of positions. The ...


47
Harpreet Singh Sawhney, Jayakrishnan Eledath, Ajay Divakaran, Mayank Bansal, Hui Cheng: Method and apparatus for correlating and viewing disparate data. SRI International, Moser Taboada, June 9, 2015: US09053194 (1 worldwide citation)

A computer-implemented method comprising collecting data from a plurality of information sources, identifying a geographic location associated with the data and forming a corresponding event according to the geographic location, correlating the data and the event with one or more topics based at lea ...


48
Ajay Divakaran, Huifang Sun: Segment identification for compressed video bit-streams. Mitsubishi Electric, January 3, 2001: EP1065877-A1 (1 worldwide citation)

A compressed bit-stream represents a corresponding sequence having intra-coded frames and inter-coded frames. The compressed bit-stream includes bits associated with each of the inter-coded frames representing a displacement from the associated inter-coded frame to a closest matching of the intra-co ...


49
Ajay Divakaran, Feng Niu, Naveen Goela: Method and system for video segmentation. Mitsubishi Electric Research Laboratories, Dirk Brinkman, Gene Vinokur, January 31, 2012: US08107541 (1 worldwide citation)

A method segments a video. Audio frames of the video are classified with labels. Dominant labels are assigned to successive time intervals of consecutive labels. A semantic description is constructed for sliding time windows of the successive time intervals, in which the sliding time windows overlap ...


50
Ajay Divakaran, Regunathan Radhakrishnan: Unusual event detection using motion activity descriptors. Mitsubishi Electric Research Laboratories, May 22, 2003: US20030095602-A1 (1 worldwide citation)

A method detects an unusual event in a video. Motion vectors are extracted from each frame in a video acquired by a camera of a scene. Zero run-length parameters are determined for each frame from the motion vectors. The zero run-length parameters are summed over predetermined time intervals of the ...