Patents by Inventor Tin Kam Ho

Tin Kam Ho has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130065605
    Abstract: Embodiments are directed to mobile localization, and more specifically, but not exclusively, to tracking mobile devices. Embodiments include methods that consider probability kernels with distance-like metrics between distributions. Also described are probabilistic kernels that can be used for a regression of location, which can achieve up to about inn accuracy in an office environment.
    Type: Application
    Filed: September 30, 2011
    Publication date: March 14, 2013
    Inventors: Piotr Mirowski, Harald Steck, Philip A. Whiting, Ravishankar Palaniappan, William Michael MacDonald, Tin Kam Ho
  • Publication number: 20100203901
    Abstract: Location-based services are provided in a communication system comprising a wireless network. In one aspect, information indicative of location of a given mobile user device of the system is periodically collected. The collected location information is processed in a server or other processing device of the system to determine at least one normal pattern of movement of the mobile user device from at least a first location to a second location. An alert is generated if subsequent movement of the mobile user device from the first location to the second location exhibits a significant deviation from the normal pattern of movement. The normal pattern of movement may be used to generate a multidimensional geofence that includes, in addition to a geographic area dimension, at least one additional dimension such as, for example, a speed of movement dimension, a direction of movement dimension, a stop duration dimension, or a related device proximity dimension.
    Type: Application
    Filed: February 11, 2009
    Publication date: August 12, 2010
    Inventors: Robert K. Dinoff, Tin Kam Ho, Richard B. Hull, Bharat Kumar, Daniel Francis Lieuwen, Hendrik B. Meeuwissen, Haobo Ren, Paulo A. Santos
  • Publication number: 20090214204
    Abstract: Example embodiments include a method for monitoring an optical network. The method provides received network data to a network model, which determines if there is an inconsistency within the optical network. The network models include a statistical model and a detailed-physical model, both of which model amplifier physics.
    Type: Application
    Filed: February 21, 2008
    Publication date: August 27, 2009
    Inventors: Thomas Bengtsson, Tin Kam Ho, Todd R. Salamon, Christopher A. White
  • Publication number: 20080273689
    Abstract: A tone advisor, a tone assisting system and a method of associating tones with callers. In one embodiment the method includes: (1) monitoring calls to and from a user, (2) obtaining information based on the calls and (3) categorizing a caller associated with at least one of the calls into a contact group according to the information and (4) assigning a genre of tones to the contact group.
    Type: Application
    Filed: May 4, 2007
    Publication date: November 6, 2008
    Applicant: Lucent Technologies Inc.
    Inventors: Robert K. Dinoff, Tin Kam Ho, Richard B. Hull, Bharat Kumar, Daniel Francis Lieuwen, Haobo Ren, Paulo A. Santos, Anwar I. Walid
  • Publication number: 20080130645
    Abstract: Improved techniques are disclosed for detecting instability events in data communications systems that support inter-administrative domain (inter-domain) routing. For example, a technique for detecting an instability event in a communications system supporting inter-administrative domain routing includes the following steps. At an inter-domain router, one or more features are extracted from one or more messages obtained from at least another router in the communications system. The one or more extracted features include a path length feature, a path edit distance feature, or a combination thereof. Then, the inter-domain router detects whether an instability event has occurred in the communications system based on the one or more extracted features such that an action can be effectuated. By way of example, the one or more messages may include one or more border gateway protocol update messages and the inter-domain router may be a border gateway protocol router.
    Type: Application
    Filed: November 30, 2006
    Publication date: June 5, 2008
    Inventors: Shivani Deshpande, Tin Kam Ho, Marina K. Thottan
  • Patent number: 6900762
    Abstract: Systems and techniques for location determination. A plurality of tags emitting radio frequency signals are dispersed throughout a region, such as a building, within which a user's location is to be determined. The radio frequency signals emitted by the tags include information that can be used to identify the location in which the tags axe placed, or simply to distinguish the tags from one another. A portable device receives signals from the tags and provides the signal information to a location server that computes the location of the portable device by comparing the signal information received from the portable device to a map of location venus stored signal information, and identifies the location of the portable device as the location for which the stored signal information best matches the signal information received from the portable device.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: May 31, 2005
    Assignee: Lucent Technologies Inc.
    Inventors: Michael R. Andrews, Tin Kam Ho, Gregory P. Kochanski, Louis J. Lanzerotti, David J. Thomson
  • Publication number: 20040061646
    Abstract: Techniques for location determination are described. A plurality of tags emitting radio frequency signals are dispersed throughout an region, such as a building, within which a user's location is to be determined. The radio frequency signals emitted by the tags include information that can be used to identify the location in which the tags are placed, or simply to distinguish the tags from one another. A portable device receives signals from the tags and provides the signal information to a location server that computes the location of the portable device by comparing the signal information received from the portable device to a map of location versus stored signal information, and identifies the location of the portable device as the location for which the stored signal information best matches the signal information received from the portable device.
    Type: Application
    Filed: September 30, 2002
    Publication date: April 1, 2004
    Applicant: Lucent Technologies, Inc.
    Inventors: Michael R. Andrews, Tin Kam Ho, Gregory P. Kochanaki, Louis J. Lanzerotti, David J. Thomson
  • Patent number: 6252988
    Abstract: An adaptive OCR technique for character classification and recognition without the input and use of ground truth derived from the image itself. A set of so-called stop words are employed for classifying symbols, e.g., characters, from any image. The stop words are identified independent of any particular image and are used for classification purposes across any set of images of the same language, e.g., English. Advantageously, an adaptive OCR method is realized without the requirement of the selection and inputting of ground truth from each individual image to be recognized.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: June 26, 2001
    Assignee: Lucent Technologies Inc.
    Inventor: Tin Kam Ho
  • Patent number: 6052483
    Abstract: An image classifier receives input images and assigns each input image to one of a plurality of image classes. The image classifier includes plural class distribution maps, each based on a plurality of features evaluated on training images, and each representing those feature values that occur at least once among the training images belonging to the corresponding class. The image classifier further includes means for constructing a test map by evaluating the plurality of features on the input image. The image classifier further includes means for comparing the test map to the class distribution maps in order to identify which one of the class distribution maps has the least distance to the test map. At least one of the features is defined according to a rule that relates to the shapes of images of at least one image class. One advantageous method for evaluating features is carried out storing the input pattern, in a digital memory, as a point in a representational space.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: April 18, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Henry Spalding Baird, Tin Kam Ho
  • Patent number: 6009199
    Abstract: In a decision-forest classifier in accordance with the invention, a decision forest including multiple decision trees is used to classify "seen" training data and "unseen" data. Each individual tree performs an initial classification based on randomly selected subsets of the data. The classification outcomes by the individual trees are combined using a discriminant process in the decision-forest classier to render the ultimate classification decision.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: December 28, 1999
    Assignee: Lucent Technologies Inc.
    Inventor: Tin Kam Ho
  • Patent number: 5930393
    Abstract: A technique for the enhancement of degraded document images to improve their display quality characteristics and image recognition accuracy. Images believed to be representative of the same symbol which occur in different positions over a image source (e.g., a facsimile page) are clustered together. Using the symbols within a particular cluster, an average character image outline for that cluster of symbols is derived and thereafter used to refine the matching of symbols within the cluster and to determine a final representative symbol for that cluster. The final representative symbols from the various resulting clusters are then used to replace all matching images throughout the image source. Advantageously, the display quality and recognition accuracy of the image source is enhanced after application of the present invention due to the resulting improvement of the images in the image source.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: July 27, 1999
    Assignee: Lucent Technologies Inc.
    Inventors: Tin Kam Ho, John D. Hobby
  • Patent number: 5930392
    Abstract: In a decision-forest classifier in accordance with the invention, a decision forest including multiple decision trees is used to classify "seen" training data and "unseen" data. Each individual tree performs an initial classification based on randomly selected subsets of the data. The classification outcomes by the individual trees are combined using a discriminant process in the decision-forest classier to render the ultimate classification decision.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: July 27, 1999
    Assignee: Lucent Technologies Inc.
    Inventor: Tin Kam Ho
  • Patent number: 5825925
    Abstract: An image classifier, which performs character recognition, receives input images and assigns each input image to one of a plurality of image classes. The image classifier includes plural class distribution maps, each based on a plurality of features evaluated on training images, and each representing those feature values that occur at least once among the training images belonging to the corresponding class. The image classifier further includes means for constructing a test map by evaluating the plurality of features on the input image. The image classifier further includes means for comparing the test map to the class distribution maps in order to identify which one of the class distribution maps has the least distance to the test map. At least one of the features is defined according to a rule that relates to the shapes of images of at least one image class.
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: October 20, 1998
    Assignee: Lucent Technologies Inc.
    Inventors: Henry Spalding Baird, Tin Kam Ho