Shih Fu Chang, Ching Yung Lin: Method and apparatus for image authentication. The Trustees of Columbia University in the City of New York, Baker Botts, March 11, 2003: US06532541 (130 worldwide citation)

A system for authentication of a digital image includes a signature generator for creating a robust digital signature for an original image based on instrument features of the image. An authentication processor extracts a set of invariant features for the original image from the digital signature, g ...


Shih Fu Chang, William Chen, Horace J Meng, Hari Sundaram, Di Zhong: Algorithms and system for object-oriented content-based video search. The Trustees of Columbia University in the City of New York, Baker & Botts L, May 25, 2004: US06741655 (111 worldwide citation)

Object-oriented methods and systems for permitting a user to locate one or more video objects from one or more video clips over an interactive network are disclosed. The system includes one or more server computers (

Ana B Benitez, Alejandro Jaimes, Paek Seungyup, Shih Fu Chang, Chung Sheng Li, John R Smith: Multimedia archive description scheme. The Trustees of Columbia University, IBM Thomas J Watson Search Center, Baker Botts L, September 6, 2005: US06941325 (80 worldwide citation)

A multimedia archive description scheme is provided for characterizing a multimedia archive having records and associated record descriptions. The multimedia archive description scheme provides a data structure which relates records by similarity measures. The principle data structure in the multime ...

Shih Fu Chang, David Messerschmitt, Wen Lung Chen: Method and apparatus for compositing compressed video data. The Regents of the University of California, Flehr Hohbach Test Albritton & Herbert, April 18, 1995: US05408274 (74 worldwide citation)

Inverse motion compensating devices are used to transform motion compensated transform domain video signals to corresponding transform domain video signals. A compositing mechanism receives the transform domain video signals from the inverse motion compensating devices and performs transform domain ...

Seungyup Paek, Ana Benitez, Shih Fu Chang, Atul Puri, Chung Sheng Li, John R Smith, Lawrence Bergman: Video description system and method. Baker Botts, November 28, 2006: US07143434 (53 worldwide citation)

The present invention relates to a system for generating a description record from multimedia information including, e.g., video data. A multimedia information input interface is used to receive multimedia information. A computer processor receives the multimedia information, processes the video inf ...

Shih Fu Chang, Justin Che I Chuang, Gustavo De Los Reyes, Amy Ruth Reibman: Error resilient transcoding for video over wireless channels. AT&T, Columbia University, January 15, 2002: US06339450 (48 worldwide citation)

A method and system for maintaining the quality of video transported over wireless channels uses a transcoder to modify and maintain the optical resilience of an encoded bitstream. The transcoder increases the spatial resilience by reducing the number of blocks per slice, and increases the temporal ...

Ana B Benitez, Alejandro Jaimes, Shih Fu Chang, John R Smith, Chung sheng Li: Fundamental entity-relationship models for the generic audio visual data signal description. Baker Botts, January 25, 2005: US06847980 (36 worldwide citation)

An invention for generating standard description records from multimedia information. The invention utilizes fundamental entity-relation models for the Generic AV DS that classify the entities, the entity attributes, and the relationships in relevant types to describe visual data. It also involves c ...

Ana Belen Benitez, Shih Fu Chang, Qian Huang, Seungyup Paek, Atul Puri: Multimedia integration description scheme, method and system for MPEG-7. AT&T, February 27, 2007: US07185049 (35 worldwide citation)

The invention provides a system and method for integrating multimedia descriptions in a way that allows humans, software components or devices to easily identify, represent, manage, retrieve, and categorize the multimedia content. In this manner, a user who may be interested in locating a specific p ...

Seungup Paek, Ana Benitez, Shih Fu Chang, Chung Sheng Li, John R Smith, Lawrence D Bergman, Atul Puri, Qian Huang: Image description system and method. Baker Botts, August 7, 2007: US07254285 (34 worldwide citation)

Systems and methods for describing image content establish image description records which include an object set (24), an object hierarchy (26) and entity relation graphs (28). For image content, image objects can include global objects (O0 8) and local objects (O1 2 and O2 6). The image objects are ...