Other

Sarnoff Corporation

Sharp Kabushiki Kaisha Corporation

Sony Corporation

Mediatek Corporation

Sony Electronics Inc

David Sarnoff Research Center, Inc.

Iraj Sodagar

Hung-Ju Lee

Ya-Qin Zhang

Bing-Bing Chai

Stephen A Martucci

Sriram Sethuraman

Edmond Chalom

Shipeng Li

Tihao Chiang

Dinei Afonso Ferreira Florencio

Paul Hatrack

The dominant gradient method for finding focused objects determines focused objects within an image or video frame using a dominant gradient method. The method also uses a segmentation map of the image to determine parameters which are used in ranking the objects based on their focus. The ranking of the objects is able to be used to assist in enhancing the image, encoding the image and adjusting the lens while capturing the image.

Dominant gradient method for finding focused objects

An apparatus and a method for forming a data structure that improves error resilience when applied to the coding of hierarchical subband decomposed coefficients, e.g., wavelet transform coefficients. The texture unit is defined as comprising only those AC transform coefficients that are located in one or more slices in a single subband. The texture unit is defined as comprising only those AC transform coefficients that are across 'n' subbands, where 'n' is smaller number than the total number of &#x201c;N&#x201d; levels of decomposition. A texture unit can also be defined as comprising only those bits from the DC transform coefficients that form a single bitplane.

Apparatus and method for forming a coding unit

An apparatus and method for implementing object motion segmentation and object trajectory segmentation for an image sequence. Specifically, block-based motion vectors for a pair of adjacent frames are used to derive optical flow, e.g., affine, motion parameters. Such optical flow motion parameters are employed to determine key objects where their motion and trajectory within a sequence of frames are calculated and stored. Such object motion information is used to improve or offer image processing functions such as context-based indexing of the input image sequence by using motion-based information.

Apparatus and method for context-based indexing and retrieval of image sequences

An apparatus and a method for partitioning data to improve error resilience. Specifically, one or more segment markers (symbols) are entropy encoded along with the bitstream (payload) into a packet.

Apparatus and method for data partitioning to improving error resilience

An apparatus and a concomitant method for packetizing significance-based information to improve error resilience is disclosed. Significance-based information comprises &ldquo;coefficient significance information&rdquo;. Within each packet, the &ldquo;coefficient significance information&rdquo; are coded first into a first or front portion of the packet and then the &ldquo;coefficient values&rdquo; are coded into a second or back portion of the packet.

Apparatus and method for packetizing significance-based information

Apparatus and method for encoding zerotrees in a wavelet-based coding technique. The method uses a depth-first pattern for traversing the zerotree, i.e., each branch of the tree, from parent to child to grandchild and so on, is fully traversed before a next branch is traversed. The depth-first tree traversal pattern is used to quantize the coefficients of the tree as well as to assign symbols to the quantized coefficients. The method assigns one of three symbols to each node: ZEROTREE ROOT, VALUED ZEROTREE ROOT, and VALUE. By using three symbols and the efficient tree traversal pattern, the method is substantially more efficient at encoding a zerotree than the prior art. Additionally, this concept is applied to the encoding of &ldquo;vector&rdquo; zerotrees.

Apparatus and method for encoding zerotrees generated by a wavelet-based coding technique

A generic spatially scalable shape encoding apparatus and method for deriving shape information for chrominance components from luminance component. The present generic spatially-scalable shape encoding applies a series of subband (e.g., wavelet) filters to obtain N-levels of wavelet decomposition for the texture information of both luminance and chrominance components. The application of the corresponding subsampling filters of said subband filters is applied in a manner such that the shape of the chrominance can be derived from the shape of the luminance at the same spatial layer.

Method and apparatus for generic scalable shape coding by deriving shape information for chrominance components from luminance component

An apparatus and a concomitant method is disclosed for recovering or adjusting quantized coefficients by using a nonlinear method. The method operates by fitting the received signal into one of several predefined classes, and adjusting the signal as appropriate to better fit the best suited class.

Method and apparatus for recovering quantized coefficients

An apparatus and method for implementing object trajectory segmentation for an image sequence. Specifically, block-based motion vectors for a pair of adjacent frames are used to derive optical flow, e.g., affine, motion parameters. The object trajectory segmenter applies the optical flow motion parameters to form a new prediction or method for predicting the positions of all the points on an object over time within an interval. The new prediction is then applied and the result is compared with an error metric. The results from such comparison with the error metric will dictate the proper intervals (temporal boundaries) of the image sequence at which the motion parameters are valid for various key objects.

Apparatus and method for describing the motion parameters of an object in an image sequence

A method and apparatus for recursively optimizing the rate control of a hierarchical subband coding system that offers spatial, quality and/or complexity scalabilities. The rate control method recursively adjusts the quantizer scale for each layer of a subband tree, i.e., a subband decomposed image.

Apparatus and method for optimizing the rate control for multiscale entropy encoding

An apparatus and a concomitant method is disclosed for encoding wavelet trees in a wavelet-based coding technique, which the use of band dependent tables to address specific bands of the wavelet tree addresses.

Apparatus and method for encoding wavelet trees generated by a wavelet-based coding method using band dependent tables

Vector wavelet organization

An apparatus and a concomitant method is disclosed for encoding wavelet trees to generate bitstreams with flexible degrees of spatial, quality and complexity scalabilities. The zerotree entropy (ZTE) encoding method is extended to achieve a fully scalable coding method by implementing a multiscale zerotree coding scheme.

Apparatus and method for multiscale zerotree entropy encoding

An apparatus and a concomitant method is disclosed for encoding wavelet trees in a wavelet-based coding technique using backward predictive coding of wavelet transformed coefficients, which addresses both balanced and unbalanced wavelet trees and increases the overall coding efficiency.

Apparatus and method for encoding wavelet trees by backward predictive coding of wavelet transformed coefficients

An apparatus and a concomitant method is disclosed for encoding wavelet trees in a wavelet-based coding technique, which addresses both balanced and unbalanced wavelet trees and increases the overall coding efficiency.

Growing community of inventors

North Brunswick, NJ, United States of America

Iraj Sodagar