Download Stereo Scene Flow for 3D Motion Analysis by Andreas Wedel PDF

By Andreas Wedel

The actual and special estimation of third-dimensional movement vector fields in genuine time is still one of many key pursuits for the self-discipline of desktop vision.

This very important text/reference provides tools for estimating optical stream and scene movement movement with excessive accuracy, targeting the sensible software of those tools in camera-based driving force information structures. in actual fact and logically based, the ebook builds from simple issues to extra complicated suggestions, overlaying subject matters from variational equipment and optic move estimation, to adaptive regularization and scene move research. This in-depth dialogue culminates within the improvement of a unique, exact and strong scene circulate process for the higher-level demanding situations posed through real-world applications.

Topics and features:

  • Reviews the foremost advances in movement estimation and movement research, and the most recent growth of dense optical movement algorithms
  • Investigates using residual photographs for optical flow
  • Examines equipment for deriving movement from stereo picture sequences
  • Analyses the mistake features for movement variables, and derives scene circulate metrics for flow probability and velocity
  • Introduces a framework for scene flow-based relocating item detection and segmentation, and discusses the appliance of Kalman filters for propagating scene move estimation over time
  • Includes pseudo code for all vital computational challenges
  • Contains Appendices on facts phrases and quadratic optimization, and scene movement implementation utilizing Euler-Lagrange equations, as well as a precious thesaurus and Index

A priceless reference for researchers and graduate scholars on segmentation, optical move and scene stream, this specified publication can also be of serious curiosity to pros interested in the advance of motive force information systems.

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Extra resources for Stereo Scene Flow for 3D Motion Analysis

Example text

For now, we will continue with the toy example from Sect. 1 and show how median filtering improves the optical flow field. The example is followed by implementation details on the Refinement Optical Flow framework. : Denoising the Flow Field Let us continue the toy example from Sect. 1, Fig. 11. The inherent problem is that the optical flow vectors after the data term evaluation are quite noisy; hence, 30 2 Optical Flow Estimation Fig. 12 Results after convergence of median filtering to the root image.

The basic idea behind this splitting technique is that an image can be regarded as a composition of a structural part, corresponding to the main large objects in the image, and a textural part, containing fine scale details. See Fig. 2 for an example of such a structure–texture decomposition, also known as cartoon–texture decomposition. Loosely speaking, structure–texture decomposition can be interpreted as a nonlinear variant of high-pass filtering. The expectation is that shadows show up only in the structural part which includes the main large objects.

25) corresponding to an inhomogeneous and potentially anisotropic regularization induced by a structure-dependent tensor D(∇I ). The central idea is that the smoothness of v along the two eigenvectors of D is weighted by the corresponding eigenvalues. In fact, anisotropic structure-dependent regularization was already proposed by Nagel in 1983 [65]. This is achieved by setting D(∇I ) = 1 ∇I ⊥ ∇I + 2λ |∇I |2 ⊥ + λ2 Id where Id denotes the unit matrix. This leads to an anisotropic smoothing of u along the level lines of the image intensity while preserving discontinuities across level lines.

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