Joohee H Kim

US Patent:

7117423, Oct 3, 2006

Filed:

Apr 24, 2003

Appl. No.:

10/423846

Inventors:

Joohee Kim - Atlanta GA, US
Russell M. Mersereau - Atlanta GA, US
Yucel Altunbasak - Norcross GA, US

Assignee:

Georgia Tech Research Corp. - Atlanta GA

International Classification:

H03M 13/35
H04L 1/02

US Classification:

714774, 370436, 370437, 714820, 714821

Abstract:

Methods and systems for streaming data in a network. Whether the network is experiencing high packet loss may be determined by a rate control module. If high packet loss is experienced, data is encoded into multiple streams by a coder using temporal domain partitioning. If high packet loss is not experienced, then data may is encoded by using frequency domain partitioning. Unequal error protection is applied to each of the streams so more important bit planes in a bit of a stream are provided with more error protection than less important bit planes. The streams are transmitted along, respectively, independent paths to a decoder. The streams are decoded, and errors in the decoded streams are corrected by using information from one or more of the other decoded streams. The decoded corrected streams are reconstructed into the data.

US Patent:

20170032676, Feb 2, 2017

Filed:

Jul 22, 2016

Appl. No.:

15/216934

Inventors:

Maziar LOGHMAN - Chicago IL, US
Joohee KIM - Oak Brook IL, US

Assignee:

ILLINOIS INSTITUTE OF TECHNOLOGY - Chicago IL

International Classification:

G08G 1/16
G06T 7/00
H04N 13/02

Abstract:

A region of interest (ROI) generation method for stereo-based pedestrian detection systems. A vertical gradient of a clustered depth map is used to find ground plane and variable-sized bounding boxes are extracted on a boundary of the ground plane as ROIs. The ROIs are then classified into pedestrian and non-pedestrian classes. Simulation results show the algorithm outperforms the existing monocular and stereo-based methods.

US Patent:

20160048970, Feb 18, 2016

Filed:

Aug 17, 2015

Appl. No.:

14/827897

Inventors:

Maziar Loghman - Chicago IL, US
Joohee Kim - Oak Brook IL, US

International Classification:

G06T 7/00
H04N 13/02
G06T 5/00

Abstract:

A computer-implemented depth estimation method based on non-parametric Census transform with adaptive window patterns and semi-global optimization. A modified cross-based cost aggregation technique adaptively creates the shape of the cross for each pixel distinctly. In addition, a depth refinement algorithm fills holes within the estimated depth map using the surrounding background depth pixels and sharpens the object boundaries by exerting a trilateral filter to the generated depth map. The trilateral filter uses the curvature of pixels as well as texture and depth information to sharpen the edges.

US Patent:

20160050440, Feb 18, 2016

Filed:

Aug 17, 2015

Appl. No.:

14/827916

Inventors:

Ying Liu - North Tonawanda NY, US
Joohee Kim - Oak Brook IL, US

International Classification:

H04N 19/597
H04N 13/00
H04N 19/129

Abstract:

A variable block size compressed sensing (CS) method for high efficiency depth map coding. Quad-tree decomposition is performed on a depth image to differentiate irregular uniform and edge areas prior to CS acquisition. To exploit temporal correlation and enhance coding efficiency, the quad-tree based CS acquisition is further extended to inter-frame encoding, where block partitioning is performed independently on the I frame and each of the subsequent residual frames. At the decoder, pixel domain total-variation minimization is performed for high quality depth map reconstruction.