Patents Assigned to Picture Code
  • Method and system for thresholding
    Patent number: 8059905
    Abstract: Embodiments of the present invention provide for thresholding data elements (such as coefficients). According to one embodiment, a number of functions (including feature detector functions) can be applied to a data element to generate responses. Additionally, noise profiles can be consulted to determine an expected result for each function if the data element represents noise. An output value (e.g., after thresholding) for the data element can be generated based on the actual responses of the functions and the expected responses.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: November 15, 2011
    Assignee: Picture Code
    Inventor: James D. Christian
  • Method and system for characterizing noise
    Patent number: 7889943
    Abstract: Embodiments of the present invention provide a method and system for characterizing noise in a set of data based on an analysis of subsets of the data. For example, noise for an image can be characterized based on analyzing selected regions of the image. The characterization of the noise can be stored in a data structure that models the noise as jointly dependent on values of multiple parameters (pixel values for multiple channels). The noise can be further characterized for one or more wavelet subbands of the set of data.
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: February 15, 2011
    Assignee: Picture Code
    Inventor: James D. Christian