Abstract | ||
---|---|---|
In image segmentation the gradient vector flow snake model is widely used. For concave curvatures snake model has good convergence
capabilities, but poor contrast or saddle corner points may result in a loss of contour. We have introduced a new external
force component and an optimal initial border, approaching the final boundary as close as possible. We apply keypoints defined
by corner functions and their corresponding scale to outline the envelope around the object. The Gradient Vector Flow (GVF)
field is generated by the eigenvalues of Harris matrix and/or the scale of the feature point. The GVF field is featured by
new functions characterizing the edginess and cornerness in one function. We have shown that the max(0,log[max(λ
1, λ
2)]) function fulfills the requirements for any active contour definitions in case of difficult shapes and background conditions.
This new GVF field has several advantages: smooth transitions are robustly taken into account, while sharp corners and contour
scragginess can be perfectly detected.
|
Year | DOI | Venue |
---|---|---|
2010 | 10.1007/978-3-642-17688-3_17 | ACIVS (1) |
Keywords | Field | DocType |
corner detection,active-contour,shape analysis,harris function.,smooth transition,image segmentation,active contour | Active contour model,Saddle,Convergence (routing),Computer vision,Corner detection,Image segmentation,Vector flow,Artificial intelligence,Mathematics,Eigenvalues and eigenvectors,Shape analysis (digital geometry) | Conference |
Citations | PageRank | References |
4 | 0.45 | 12 |
Authors | ||
2 |
Name | Order | Citations | PageRank |
---|---|---|---|
Andrea Kovács | 1 | 37 | 3.56 |
Tamás Szirányi | 2 | 152 | 26.92 |