Browsing Computer Science and Artificial Intelligence Lab (CSAIL) by Subject "optical flow"

Now showing items 1-5 of 5

  • Contour Matching Using Local Affine Transformations 

    Unknown author (1992-04-01)
    Partial constraints are often available in visual processing tasks requiring the matching of contours in two images. We propose a non- iterative scheme to determine contour matches using locally affine transformations. ...

  • Motion Field and Optical Flow: Qualitative Properties 

    Unknown author (1986-12-01)
    In this paper we show that the optical flow, a 2D field that can be associated with the variation of the image brightness pattern, and the 2D motion field, the projection on the image plane of the 3D velocity field of ...

  • Multigrid Relaxation Methods and the Analysis of Lightness, Shading and Flow 

    Unknown author (1984-10-01)
    Image analysis problems, posed mathematically as variational principles or as partial differential equations, are amenable to numerical solution by relaxation algorithms that are local, iterative, and often parallel. ...

  • The Smoothest Velocity Field and Token Matching 

    Unknown author (1983-08-01)
    This paper presents some mathematical results concerning the measurement of motion of contours. A fundamental problem of motion measurement in general is that the velocity field is not determined uniquely from the ...

  • The Video Mesh: A Data Structure for Image-based Video Editing 

    Unknown author (2009-12-16)
    This paper introduces the video mesh, a data structure for representing video as 2.5D "paper cutouts." The video mesh allows interactive editing of moving objects and modeling of depth, which enables 3D effects and ...