منابع مشابه
Determining Constant Optical Flow
The original optical flow algorithm [1] dealt with a flow field that could vary from place to place in the image, as would typically occur when a camera is moved through a three-dimensional environment—or if objects moved in front of a fixed camera. A related, but simpler problem, is that of recovering the motion of an image, all parts of which move with the same velocity (section 4.3 in [2]). ...
متن کاملDetermining Optical Flow
Optical flow cannot be computed locally, since only one independent measurement is available from the image sequence at a point, while the flow velocity has two components. A second constraint is needed. A method for finding the optical flow pattern is presented which assumes that the apparent velocity of the brightness pattern varies smoothly almost everywhere in the image. An iterative implem...
متن کامل"Determining optical flow": A Retrospective
Our work on estimating optical flow [8] was important not because it solved (in some limited way) the problem of estimating optical flow, but because it represented the start of the variational approach to machine vision. The variational approach to machine vision problems was applied to shape-from-shading soon afterwards (Ikeuchi and Horn [10] ), and has since found its way into many areas of ...
متن کاملDetermining Temporally Evaluated Optical Flow
The existing ~iiethods to ext,ract optical flow nieasure the distance t,hat. each pixel moves between a pair of successive image frames. I t is however difficult to extract accurat,e opt.ica1 flow when the niot,ion in the iniage is very large or small. In order to deal wit,li t.llis probleni. we propose temporally etralunted optical flour, \vllicli me con1put.e by measuring the tinie required f...
متن کاملDetermining Optical Flow using a Modified Horn and Schunck's Algorithm
The computation of the optical flow field can be performed through the minimization of some energy functional that consists of two terms: a data term, that requires brightness constancy of patterns in the image sequence, and a regularization term to guarantee piecewise smoothness and to avoid ill-posed problems. In this paper, we propose a new regularization term based on the symmetric gradient...
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ژورنال
عنوان ژورنال: Artificial Intelligence
سال: 1981
ISSN: 0004-3702
DOI: 10.1016/0004-3702(81)90024-2