Browsing Computer Science by Author "Betke, Margrit"

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Browsing Computer Science by Author "Betke, Margrit"

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  • Epstein, Samuel; Betke, Margrit (Boston University Computer Science Department, 2009-03-10)
    We introduce Active Hidden Models (AHM) that utilize kernel methods traditionally associated with classification. We use AHMs to track deformable objects in video sequences by leveraging kernel projections. We introduce ...
  • Magee, John; Epstein, Samuel; Missimer, Eric; Betke, Margrit (CS Department, Boston University, 2010-09-06)
    Users of mouse-replacement interfaces may have difficulty conforming to the motion requirements of their interfacesystem. We have observed users with severe motor disabilities who controlled the mouse pointer with a head ...
  • Betke, Margrit; Hong, Harrison; Ko, Jane P. (Boston University Computer Science Department, 2001)
    We developed an automated system that registers chest CT scans temporally. Our registration method matches corresponding anatomical landmarks to obtain initial registration parameters. The initial point-to-point registration ...
  • Betke, Margrit (Boston University Computer Science Department, 2008)
    Intelligent assistive technology can greatly improve the daily lives of people with severe paralysis, who have limited communication abilities. People with motion impairments often prefer camera-based communication interfaces, ...
  • Kim, Won-Beom; Kwan, Christopher; Fedyuk, Igor; Betke, Margrit (Boston University Computer Science Department, 2008)
    Camera Canvas is an image editing software package for users with severe disabilities that limit their mobility. It is specially designed for Camera Mouse, a camera-based mouse-substitute input system. Users can manipulate ...
  • Rodeski, Vladimir; Mullally, William; Bellardine, Carissa; Lutchen, Kenneth; Betke, Margrit (Boston University Computer Science Department, 2005-07-07)
    A difficulty in lung image registration is accounting for changes in the size of the lungs due to inspiration. We propose two methods for computing a uniform scale parameter for use in lung image registration that account ...
  • Akram, Wajeeh; Tiberii, Laura; Betke, Margrit (Boston University Computer Science Department, 2006-05-11)
    Many people suffer from conditions that lead to deterioration of motor control and makes access to the computer using traditional input devices difficult. In particular, they may loose control of hand movement to the extent ...
  • Missimer, Eric; Epstein, Samuel; Magee, John; Betke, Margrit (CS Department, Boston University, 2010-08-12)
    Customizable Keyboard is an on-screen keyboard designed to be flexible and expandable. Instead of giving the user a keyboard layout Customizable Keyboard allows the user to create a layout that is accommodating to the ...
  • Athitsos, Vassilis; Wang, Jingbin; Sclaroff, Stan; Betke, Margrit (Boston University Computer Science Department, 2005-06-13)
    This paper proposes a method for detecting shapes of variable structure in images with clutter. The term "variable structure" means that some shape parts can be repeated an arbitrary number of times, some parts can be ...
  • Mullally, William; Sclaroff, Stan; Betke, Margrit (Boston University Computer Science Department, 2009-03-11)
    We propose a novel image registration framework which uses classifiers trained from examples of aligned images to achieve registration. Our approach is designed to register images of medical data where the physical condition ...
  • Castelli, Thomas J.; Betke, Margrit; Neidle, Carol (Boston University Computer Science Department, 2005-07-07)
    Facial features play an important role in expressing grammatical information in signed languages, including American Sign Language(ASL). Gestures such as raising or furrowing the eyebrows are key indicators of constructions ...
  • Waber, Benjamin N.; Magee, John J.; Betke, Margrit (Boston University Computer Science Department, 2005-07-07)
    Accurate head tilt detection has a large potential to aid people with disabilities in the use of human-computer interfaces and provide universal access to communication software. We show how it can be utilized to tab through ...
  • Magee, John; Betke, Margrit (CS Department, Boston University, 2010-09-06)
    We present a framework to adapt software to the needs of individuals with severe motion disabilities who use mouse substitution interfaces. Typically, users are required to adapt to the interfaces that they wish to use. ...
  • Betke, Margrit; Wang, Jingbin; Ko, Jane P. (Boston University Computer Science Department, 2004-01-07)
    We introduce "BU-MIA," a Medical Image Analysis system that integrates various advanced chest image analysis methods for detection, estimation, segmentation, and registration. BU-MIA evaluates repeated computed tomography ...
  • Wang, Jingbin; Gu, Erdan; Betke, Margrit (Boston University Computer Science Department, 2005-02-27)
    A novel method that combines shape-based object recognition and image segmentation is proposed for shape retrieval from images. Given a shape prior represented in a multi-scale curvature form, the proposed method identifies ...
  • Gorman, Mikhail; Betke, Margrit; Saltzman, Elliot; Lahav, Amir (Boston University Computer Science Department, 2005-12-08)
    The therapeutic effects of playing music are being recognized increasingly in the field of rehabilitation medicine. People with physical disabilities, however, often do not have the motor dexterity needed to play an ...
  • Wang, Jingbin; Athitsos, Vassilis; Sclaroff, Stan; Betke, Margrit (Boston University Computer Science Department, 2006-10-02)
    Hidden State Shape Models (HSSMs) [2], a variant of Hidden Markov Models (HMMs) [9], were proposed to detect shape classes of variable structure in cluttered images. In this paper, we formulate a probabilistic framework ...
  • Chau, Michael; Betke, Margrit (Boston University Computer Science Department, 2005-03-12)
    A human-computer interface (HCI) system designed for use by people with severe disabilities is presented. People that are severely paralyzed or afflicted with diseases such as ALS (Lou Gehrig's disease) or multiple sclerosis ...
  • Theriault, Diane; Wu, Zheng; Hristov, Nickolay; Swartz, Sharon; Breuer, Kenneth; Kunz, Thomas; Betke, Margrit (CS Department, Boston University, 2010-09-06)
    The Brazilian free-tailed bat, Tadarida brasiliensis, roosts in very large colonies, consisting of hundreds of thousands of individuals. Each night, bats emerge from their day roosts in dense columns in a highly coordinated ...
  • Deshpande, Smita; Betke, Margrit (Boston University Computer Science Department, 2009-03-11)
    We present RefLink, an interface that allows users to analyze the content of webpages by dynamically linking to an online encyclopedia such as Wikipedia. Upon opening a webpage, RefLink instantly provides a list of terms ...

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