Two-Stage Robust Optical Flow Estimation
نویسندگان
چکیده
We formulate optical flow estimation as a two-stage regression problem. Based on characteristics of these two regression models and conclusions on modern regression methods, we choose a Least Trimmed Squares followed by weighted Least Squares estimator to solve the optical flow constraint (OFC); and at places where this one-stage robust method fails due to poor derivative quality, we use a Least Trimmed Squares estimator to robustify the facet model fit-
منابع مشابه
Optical Flow from a Least-Trimmed Squares Based Adaptive Approach
Optical flow estimation can be formulated as two regression stages, derivative estimation and optical flow constraints (OFC) solving. Traditional approaches use LeastSquares at both stages and are sensitive to assumption violations. To improve estimation accuracy especially near motion boundaries, we use a Least Trimmed Squares (LTS) estimator to solve the OFC, obtaining a confidence measure fo...
متن کاملComputation Optical Flow Using Pipeline Architecture
Accurate estimation of motion from time-varying imagery has been a popular problem in vision studies, This information can be used in segmentation, 3D motion and shape recovery, target tracking, and other problems in scene analysis and interpretation. We have presented a dynamic image model for estimating image motion from image sequences, and have shown how the solution can be obtained from a ...
متن کاملAdaptive Multi-Stage 2D Image Motion Field Estimation
This paper addresses the problem of robust 2D image motion estimation in natural environments. We develop an adaptive tracking-region selection and optical-flow estimation technique. The strategy of adaptive region selection locates reliable tracking regions and makes their motion estimation more reliable and computationally efficient. The multi-stage estimation procedure makes it possible to d...
متن کاملA state of the art on the computation of the optical flow From the optical flow equation to an estimation including multiscale , robust estimation and edge - preserving regularization PhD . exam
From the optical flow equation to an estimation including multiscale, robust estimation and edge-preserving regularization
متن کاملResolution Enhancement by Incorporating Segmentation-based Optical Flow Estimation
In this paper, the problem of recovering a highresolution frame from a sequence of low-resolution frames is considered. High-resolution reconstruction process highly depends on image registration step. Typical resolution enhancement techniques use global motion estimation technique. However, in general, video frames cannot be related through global motion due to the arbitrary individual pixel m...
متن کامل