Journal ArticleDOI
A differential method for simultaneous estimation of rotation, change of scale and translation
S. F. Wu,Josef Kittler +1 more
TLDR
A four-parameter motion model, capable of describing rotation, change of scale and translation simultaneously, is proposed, which is a differential one applied in conjunction with a multi-resolution iteration scheme to enhance its measuring range and efficiency.Abstract:
The problem of 2-D motion estimation with application to image sequence coding is considered in this paper. A four-parameter motion model, capable of describing rotation, change of scale and translation simultaneously, is proposed. The four motion parameters are estimated directly from an image sequence without the need for establishing the correspondence between pixels or features. The method is a differential one applied in conjunction with a multi-resolution iteration scheme to enhance its measuring range and efficiency. Experimental results demonstrate that the motion parameters can be estimated accurately by the method with minimal computational effort.read more
Citations
More filters
Journal ArticleDOI
Efficient, robust, and fast global motion estimation for video coding
Frederic Dufaux,Janusz Konrad +1 more
TL;DR: From the experimental results, it is concluded that global motion estimation provides significant performance gains for video material with camera zoom and/or pan and that the robust error criterion can introduce additional performance gains without increasing computational complexity.
Image Sequence Coding at Verv Low Bitrates: A Review
TL;DR: In this article, a review of promising techniques for very low bit-rate, below 64 kb/s, image sequence coding is presented, and two types of potential coding techniques are addressed.
Journal ArticleDOI
A noise-robust frequency domain technique for estimating planar roto-translations
L. Lucchese,Guido M. Cortelazzo +1 more
TL;DR: A new method for estimating planar roto-translations that operates in the frequency domain and as such, is not based on features, which is very robust against noise, it can be very accurate, and can become an effective tool for unsupervised estimation of roto -translations by means of implementations based on FFT algorithms.
Proceedings ArticleDOI
Global zoom/pan estimation and compensation for video compression
Y.T. Tse,R.L. Baker +1 more
TL;DR: Simulations suggest the algorithm is robust and accurate, and can significantly reduce both the energy of the motion compensated residual image as well as the zeroth-order entropy of the local displacement vector field.
Journal ArticleDOI
Fast video segmentation algorithm with shadow cancellation, global motion compensation, and adaptive threshold techniques
TL;DR: A fast video segmentation algorithm for MPEG-4 camera systems with change detection and background registration techniques, which can give satisfying segmentation results with low computation load.
References
More filters
Book
Robot Vision
TL;DR: Robot Vision as discussed by the authors is a broad overview of the field of computer vision, using a consistent notation based on a detailed understanding of the image formation process, which can provide a useful and current reference for professionals working in the fields of machine vision, image processing, and pattern recognition.
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
Methods for measuring small displacements of television images
C. Cafforio,Fabio Rocca +1 more
TL;DR: A segmentation algorithm is proposed which uses dynamic programming (Viterbi algorithm with three states) and a simpler method that makes possible the estimation of the n most probable displacements is proposed.
Journal ArticleDOI
Volumetric model and 3D trajectory of a moving car derived from monocular TV frame sequences of a street scene
TL;DR: A polyhedral approximation for the volumetric description of a moving rigid object from a real-world scene is derived, based on measurements in monocular TV-frame sequences, and is compared to related ones reported in the recent literature.
Proceedings ArticleDOI
Object tracking with a moving camera
Peter J. Burt,James R. Bergen,Rajesh Hingorani,R.J. Kolczynski,W.A. Lee,A. Leung,J. Lubin,H. Shvayster +7 more
TL;DR: The authors describe the implementation of the local and focal levels of a dynamic-motion-analysis framework and concludes that the dynamic approach to motion analysis holds the promise of performing real-time processing to obtain precise, robust results, using practical hardware.