image abstraction
Post on 24-Feb-2016
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Image AbstractionChunsong Wang
Image Abstraction: Main Problem How to decrease the complexity of the scene
while protecting important structures?
Mean Curvature Flow View Image I(x,y) as a height field, we are
able to draw contours of the same color value(isophote).
Mean Curvature flow(MCF): Smooth the curvatures, high-curvature portion is smoothed faster
MCF: Evolution Equation Evolution Equation:
Where κ = local isophote curvature
MCF: Evolution
Shock Filtering Edge Enhancement:
Filtering with Laplacian-of Gaussian function
Constrained mean curvature flow MCF+Shock filtering: still too aggressive Tangent vector Field(TVF): denotes ‘desired’
feature direction
CMCF: Evolution Equation Evolution Equation:
Where
Where denotes the vector perpendicular to
CMCF: Algorithm
Incorporating user input
Weighted Map
Layered Map
Layered Map
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