1
Shijun Sun, Yongmin Kim: Object segmentation with background extraction and moving boundary techniques. University of Washington, Steven P Koda, May 4, 2004: US06731799 (354 worldwide citation)

Image data for an image frame are allocated among three groups. In one group are image data which are part of a derived motion boundary, along with image data which differ by at least a threshold amount from a corresponding point among normalized background data. In another group are image data whic ...


2
Niko Pagoulatos, David R Haynor, Warren S Edwards, Yongmin Kim: Apparatus and method for interactive 3D registration of ultrasound and magnetic resonance images based on a magnetic position sensor. University of Washington, Blakely Sokoloff Taylor & Zafman, August 10, 2004: US06775404 (161 worldwide citation)

Intraoperative ultrasound (US) is integrated with stereotactic systems, where a system interactively registers two-dimensional (2D) US and three-dimensional (3D) magnetic resonance (MR) images. The registration is based on tracking a US probe with a bC magnetic position sensor. A transformation algo ...


3
Thomas Alexander, Yongmin Kim, Hyunwook Park, Kil Su Eo, Jing Ming Jong: Imaging and graphics processing system. Board of Regents of the University of Washington, Samsung Electronics, Chrstensen O Connor Johnson & Kindness, November 14, 1995: US05467459 (78 worldwide citation)

The present invention provides a unified image and graphics processing system that provides both image and graphics processing at high speeds. The system includes a parallel vector processing unit, a graphics subsystem, a shared memory and a set of high-speed data buses for connecting all of the oth ...


4
Shijun Sun, Yongmin Kim: Motion estimation within a sequence of data frames using optical flow with adaptive gradients. University of Washington, Steven P Koda, November 12, 2002: US06480615 (68 worldwide citation)

The optical flow of an array of pixels in an image field is determined using adaptive spatial and temporal gradients. Artifacts are avoided for image objects which are moving smoothly relative to the image field background. Data from three image frames are used to determine optical flow. A parameter ...


5
Yongmin Kim, Jeffrey T Reeve, Christopher H Basoglu, Ja Il Koo: Ultrasound signal processing apparatus. University of Washington, Koda Law Office, February 20, 1996: US05492125 (65 worldwide citation)

An ultrasound signal processing apparatus provides a programmable platform for various clinical ultrasound applications. The apparatus is part of an ultrasound medical diagnostic imaging system. Data is processed in real-time, near real-time or in delayed playback. In one embodiment a pair of multi- ...


6
Warren Edwards, Christian Deforge, Yongmin Kim: Ultrasound imaging with real time 3D image reconstruction and visualization. University of Washington, Steven P Koda, August 4, 1998: US05787889 (62 worldwide citation)

A 3D image is generated in real-time on an ultrasound medical imaging system which performs acquisition, volume reconstruction, and image visualization tasks using multiple processors. The acquisition task includes deriving position and orientation indicators for each gathered image frame. Volume re ...


7
Todd Schoepflin, Vikram Chalana, David Haynor, Yongmin Kim: Video object tracking using a hierarchy of deformable templates. University of Washington, Steve Koda Esq, June 3, 2003: US06574353 (59 worldwide citation)

A hierarchy of deformation operations is implemented to deform a template and match the deformed template to an object in a video frame. At each level, the constraints on the template deformations are relaxed, while the spatial range of the object boundary search is narrowed. At a highest level, an ...


8
Shijun Sun, Yongmin Kim: Video object segmentation using active contour modelling with global relaxation. University of Washington, Steven P Koda, April 8, 2003: US06546117 (50 worldwide citation)

A system for image object tracking and segmentation, includes (i) a modified adaptive resonance theory-2 (M-ART2) model for detecting changes of scenes, (ii) a two-dimensional correlative autopredicitve search (2D CAPS) method for object tracking, (iii) a derivation of contour energy for use in mode ...


9
Hyun Wook Park, Lakshmanan Gopishankar, Shijun Sun, Yongmin Kim: Image processing in HSI color space using adaptive noise filtering. University of Washington, Steven P Koda Esq, March 18, 2003: US06535632 (48 worldwide citation)

Adaptive noise filtering is applied to an image frame of HSI data to reduce and more uniformly distribute noise while preserving image feature edges. An adaptive spatial filter includes a plurality of averaging kernels. An appropriate kernel is selected for each pixel for each of the hue and saturat ...


10
HyunWook Park, Todd Schoepflin, Shijun Sun, Yongmin Kim: Video object segmentation using active contour model with directional information. University of Washington, Steven P Koda, June 28, 2005: US06912310 (40 worldwide citation)

Object segmentation and tracking are improved by including directional information to guide the placement of an active contour (i.e., the elastic curve or ‘snake’) in estimating the object boundary. In estimating an object boundary the active contour deforms from an initial shape to adjust to image ...