Patents by Inventor Dimitris Agrafiotis

Dimitris Agrafiotis 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).

  • Patent number: 8160145
    Abstract: A temporal error concealment is described. A video stream comprises a current frame comprising a lost image region, and a reference frame. The method comprises forming a list of motion vector candidates, the list of motion vector candidates including a set of one or more motion vectors from the current frame and a set of one or more motion vectors from the reference frame; testing each of the motion vector candidates using a matching error measure; selecting a replacement motion vector from the list based on the matching error measures; and using the selected replacement motion vector to conceal the lost image region. A mode selection method is also described. A motion vector is used to identify a motion compensated reference image region in the reference frame. A motion compensated temporal activity of an image region in the current frame is calculated based on a comparison between the image region in the current frame and the motion compensated reference image region in the reference frame.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: April 17, 2012
    Assignee: ProVision Communication Technologies Ltd.
    Inventors: David Roger Bull, Dimitris Agrafiotis
  • Publication number: 20080186404
    Abstract: A temporal error concealment is described. A video stream comprises a current frame comprising a lost image region, and a reference frame. The method comprises forming a list of motion vector candidates, the list of motion vector candidates including a set of one or more motion vectors from the current frame and a set of one or more motion vectors from the reference frame; testing each of the motion vector candidates using a matching error measure; selecting a replacement motion vector from the list based on the matching error measures; and using the selected replacement motion vector to conceal the lost image region. A mode selection method is also described. A motion vector is used to identify a motion compensated reference image region in the reference frame. A motion compensated temporal activity of an image region in the current frame is calculated based on a comparison between the image region in the current frame and the motion compensated reference image region in the reference frame.
    Type: Application
    Filed: January 6, 2006
    Publication date: August 7, 2008
    Applicant: Provision Communication Technologies Limited
    Inventors: David Roger Bull, Dimitris Agrafiotis
  • Publication number: 20060178831
    Abstract: Methods, systems and computer program products for mapping is a set of related objects into a multidimensional space. The mapping is carried out using an iterative (e.g., pairwise) refinement strategy that attempts to ensure that the distances of the objects on the map satisfy a supplied set of upper and lower bounds. In a preferred embodiment, these upper and lower bounds are derived from a supplied set of relationships (similarities, dissimilarities, or proximities) between the objects. In another preferred embodiment, these distance bounds are chosen to preserve local relationships between neighboring objects while maintaining minimum separation between remote objects.
    Type: Application
    Filed: June 12, 2003
    Publication date: August 10, 2006
    Inventors: Dimitris Agrafiotis, Huafeng Xu, Francis Salemme
  • Publication number: 20060089808
    Abstract: A self-organizing method, system, and computer program product for generating molecular conformations that are consistent with a set of distance and/or volume constraints. A stochastic proximity embedding (SPE) algorithm evaluates individual distance and/or volume constraints and adjusts the atomic coordinates to minimize violations of such constraints. The method scales linearly with thenumber of atoms, and produces many more unique conformations at a fraction of the time required by conventional distance geometry algorithms.
    Type: Application
    Filed: June 26, 2003
    Publication date: April 27, 2006
    Inventors: Dimitris Agrafiotis, Huafeng Xu, Sergei Izrailev, Francis Salemme
  • Publication number: 20050153364
    Abstract: The present invention determines properties of combinatorial library products from features of library building blocks. At least one feature is determined for each building block of a combinatorial library having a plurality of products. A training subset of products is selected from the products, and at least one property is determined for each product of the training subset. A building block set is identified for each product of the training subset, and an input features vector is formed from the features of the identified building blocks for each product of the training subset. A supervised machine learning approach is used to infer a mapping function that transforms the input features vector for each product of the training subset to the corresponding at least one property for each product of the training subset. After the mapping function is inferred, it is used for determining properties of other products of the library from their corresponding input features vectors.
    Type: Application
    Filed: November 29, 2004
    Publication date: July 14, 2005
    Inventors: Victor Lobanov, Dimitris Agrafiotis, F. Salemme
  • Patent number: 6518266
    Abstract: The present invention is directed to novel pyrazole derivatives and their use as pesticidal agents. The pyrazole derivatives have Formula I: or a salt thereof, where R1 represents R5O, R5SO2, R5SO or R5S in which R5 is as defined herein; X is halo, cyano, C1-6 alkoxycarbonyl, C2-6 alkynyl, optionally substituted C6-14 aryl or an optionally substituted 5- to 7-membered heteroaromatic ring linked to thiazole via a carbon-carbon bond; R2 is hydrogen, amino, chloro, bromo, iodo, cyano, C1-6 alkoxy, C1-6 alkyl or C6-10 aryl; and R3-R7 each represent hydrogen, halogen, straight- or branched-chain C1-4 alkyl or C1-4 alkoxy, either of which is unsubstituted or substituted by one or more halogen atoms, straight- or branched-chain C1-4 alkylthio or C1-4 alkylsulphinyl, either of which is substituted by one or more halogen atoms, nitro, cyano, or straight- or branched-chain C1-4 alkylsulphonyl group which is unsubstituted or substituted by one or more halogen atoms.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: February 11, 2003
    Assignees: 3-Dimensional Pharmaceuticals, Heska Corporation
    Inventors: Daljit S. Dhanoa, Dario Doller, Sanath Meegalla, Richard M. Soll, Nancy Wisnewski, Gary Silver, Dan T. Stinchcomb, R. Lee Seward, Dimitris Agrafiotis, Deyou Sha
  • Patent number: 6506784
    Abstract: The present invention is directed to inhibiting pest GABA receptors by contacting said receptors with a compound of Formula I: The invention is also directed to methods of controlling pests, especially insects and arachnids such as fleas and ticks, and to novel compounds within the scope of Formula I.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: January 14, 2003
    Assignees: 3-Dimensional Pharmaceuticals, Inc., Heska Corporation
    Inventors: Daljit S. Dhanoa, Dario Doller, Sanath Meegalla, Richard M. Soll, Dimitris Agrafiotis, Nancy Wisnewski, Gary M. Silver, Dan T. Stinchcomb, R. Lee Seward