Journal ArticleDOI
Image segmentation based on object oriented mapping parameter estimation
M. Hötter,R. Thoma +1 more
TLDR
In this paper, a hierarchical structured segmentation algorithm is presented, which is based on the hypothesis that an area to be segmented is defined by a set of uniform motion and position parameters denoted as mapping parameters.About:
This article is published in Signal Processing.The article was published on 1988-10-01. It has received 210 citations till now. The article focuses on the topics: Scale-space segmentation & Image segmentation.read more
Citations
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Journal ArticleDOI
Extraction of high-resolution frames from video sequences
TL;DR: A novel observation model based on motion compensated subsampling is proposed for a video sequence and Bayesian restoration with a discontinuity-preserving prior image model is used to extract a high-resolution video still given a short low-resolution sequence.
Journal ArticleDOI
Motion estimation techniques for digital TV: a review and a new contribution
Frederic Dufaux,F. Moscheni +1 more
TL;DR: This paper proposes a new locally adaptive multigrid block matching motion estimation technique that leads to a robust motion field estimation precise prediction along moving edges and a decreased amount of side information in uniform areas.
Proceedings ArticleDOI
Displacement Estimation By Hierarchical Blockmatching
TL;DR: A hierarchical blockmatching algorithm for the estimation of displacement vector fields in digital television sequences is presented, which yields reliable and homogeneous displacement vector - fields, which are close to the true displacements.
Journal ArticleDOI
Object-oriented analysis-synthesis coding of moving images
TL;DR: An object-oriented analysis-synthesis coder is presented which encodes objects instead of blocks of N × N picture elements, which allows to introduce geometrical distortions instead of quantization errors.
Journal ArticleDOI
Detection of moving cast shadows for object segmentation
TL;DR: Results obtained with MPEG-4 test sequences and additional sequences show that the accuracy of object segmentation is substantially improved in presence of moving cast shadows.
References
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Book
The Interpretation of Visual Motion
TL;DR: In this paper, the authors used the methodology of artificial intelligence to investigate the phenomena of visual motion perception: how the visual system constructs descriptions of the environment in terms of objects, their three-dimensional shape, and their motion through space, on the basis of the changing image that reaches the eye.
Journal ArticleDOI
Determining Three-Dimensional Motion and Structure from Optical Flow Generated by Several Moving Objects
TL;DR: A new approach for the interpretation of optical flow fields is presented, where the flow field is partitioned into connected segments of flow vectors, where each segment is consistent with a rigid motion of a roughly planar surface.
Journal ArticleDOI
Estimating three-dimensional motion parameters of a rigid planar patch
R. Tsai,Thomas S. Huang +1 more
Abstract: We present a new direct method of estimating the three-dimensional motion parameters of a rigid planar patch from two time-sequential perspective views (image frames). First, a set of eight pure parameters are defined. These parameters can be determined uniquely from the two given image frames by solving a set of linear equations. Then, the actual motion parameters are determined from these pure parameters by a method which requires the solution of a sixth-order polynomial of one variable only, and there exists a certain efficient algorithm for solving a sixth-order polynomial. Aside from a scale factor for the translation parameters, the number of real solutions never exceeds two. In the special case of three-dimensional translation, the motion parameters can be expressed directly as some simple functions of the eight pure parameters. Thus, only a few arithmetic operations are needed.
Journal ArticleDOI
Optical Flow Estimation: An Error Analysis of Gradient-Based Methods with Local Optimization
TL;DR: This paper examines the sources of errors for gradient-based techniques that locally solve for optical flow that assume that optical flow is constant in a small neighborhood and the consequence of violating this assumption.
Journal ArticleDOI
Motion compensating field interpolation using a hierarchically structured displacement estimator
M Bierling,R Thoma +1 more
TL;DR: In this paper, a displacement vector with integer components for each picture element of the fields to be interpolated is provided, and a change detector is used to assure zero displacement vectors in unchanged areas.