optic flow from dynamic anchor point attributes a feasibility study bart janssen
Post on 22-Dec-2015
218 views
TRANSCRIPT
Optic flow from dynamic anchor point attributes
a feasibility study
Bart Janssen
Optic Flow• Medical Image Registration
• Video Processing / Coding
• Robotics
The notion of scale:Objects live at different scales
Solution?Look at all scales
simultaniously
Scale Space in Human Vision
• The human visual system is a multi-scale sampling device
• The retina contains receptive fields; groups of receptors assembled in such a way that they form a set of apertures of widely varying size.
Gaussian Scale SpaceScale
x
y
The Aperture problem:Constant brightness assumption is insufficient
The Aperture problem:Constant brightness assumption is insufficient
Solution?Use points were the apperture problem is
non-existent
Proposed Method
Outline
• Introduction• Anchor Points• Stationary Reconstruction• Flow Reconstruction
Anchor pointsSingular Points of a
Gaussian scale space image
Fold catastrophe
Static PropertiesDifferential structure at the location of a Singular Point by innerproduct of theimage with derivatives of the Gaussian
Dynamic Properties
Outline
• Introduction• Anchor Points• Stationary Reconstruction• Flow Reconstruction
Stationary reconstruction
Stationary reconstruction
Optic flow reconstruction
Conclusions
Differential Structure
Error Measure