Laurent D. COHEN.
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1 for biomedical image segmentation Laurent D. COHEN Directeur de Recherche CNRS CEREMADE, UMR CNRS 7534 Université Paris-9 Dauphine Place du Maréchal de Lattre de Tassigny Paris, France Some joint works with Y. Rouchdy, and J. Mille. LJLL, Journée thématique maths, image et biomédecine 18 Décembre /12/ :12 Laurent COHEN, LJLL, Overview Minimal Paths, Fast Marching and Front Propagation Geodesic Density for tree structures Using Geodesic voting with Radius energy Using Geodesic voting as a prior shape Using Geodesic voting as initial deformable tree 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
2 Paths of minimal energy p1 p2 Looking for a path along which a feature Potential P(x,y) is minimal E( C) ( ( 0 example: a vessel dark structure P =gray level Input : Start point p1=(x1,y1) End point p2 =(x2,y2) Image Output: Minimal Path = L P C s)) ds 19/12/ :12 Laurent COHEN, LJLL, Minimal Paths: Eikonal Equation 0 E( C) = L P( C( s)) ds Potential P>0 takes lower values near interesting features : on contours, dark structures,... STEP 1 : search for the surface of minimal action U of p1 as the minimal energy integrated along a path between start point p1 and any point p in the image Start point C (0) = p1; L Up 1 p) = E( C) = P( C( s)) ds ( inf inf C(0) = p1; C( L) = p 0 C(0) = p1; C( L) = p STEP 2: Back-propagation from the end point p2 to the start point p1: Simple Gradient Descent along U p1 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
3 Minimal Paths: Eikonal Equation STEP 1 : minimal action U of p1 as the minimal energy integrated along a path between start point p1 and any point p in the image Start point C (0) = p1; L Up 1 p) = E( C) = P( C( s)) ds ( inf inf 0 Solution C(0) = p1; C of ( L) Eikonal = p equation: C(0) = p1; C( L) = p U p 1 ( x) = P( x) and U p1( p1) = 0 Example P=1, U Euclidean distance to p1 in general, U weighted geodesic distance to p1 19/12/ :12 Laurent COHEN, LJLL, Minimal Paths: Eikonal Equation 0 E( C) = L P( C( s)) ds STEP 2: Back-propagation from the end point p2 to the start point p1: Simple Gradient Descent along U p1 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
4 Minimal Path between p1 and p2 C. Bouzigues image I potential 19/12/ :12 Laurent COHEN, LJLL, Step #1 Minimal Path between p1 and p2 Etape #2 Descente de gradient sur extraire le chemin minimal pour 19/12/ :12 potential Laurent COHEN, LJLL, LJLL, Dec
5 Minimal Path between p1 and p2 Step #1: U obtained by the FAST MARCHING ALGORITHM potentiel L. D. Cohen, R. Kimmel Global minimum for active contour models : a minimal path approach. 19/12/ :12 International Journal Laurent of Computer COHEN, LJLL, Vision, :57-78, Minimal Path between p1 and p2 Step #1: U obtained by the FAST MARCHING ALGORITHM Etape #2 Descente de gradient sur extraire le chemin minimal pour minimal action 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
6 Minimal Path between p1 and p2 Step #1 Step #2 gradient descent on extraction of minimal path for minimal action 19/12/ :12 Laurent COHEN, LJLL, Minimal Path between p1 and p2 minimal action L. D. Cohen, R. Kimmel Global minimum for active contour models : a minimal path approach. 19/12/ :12 International Journal Laurent of Computer COHEN, LJLL, Vision, :57-78, LJLL, Dec
7 Minimal Path between p1 and p2 minimal path Is obtained by solving ODE: simple gradient descent on from p 2 to p 1 minimal action L. D. Cohen, R. Kimmel Global minimum for active contour models : a minimal path approach. 19/12/ :12 International Journal Laurent of Computer COHEN, LJLL, Vision, :57-78, Step #1 Minimal Path between p1 and p2 Step #2 gradient descent on extraction of minimal path for minimal action 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
8 Minimal Path between p1 and p2 Step #1 Step #2 gradient descent on extraction of minimal path for 19/12/ :12 potential Laurent COHEN, LJLL, Overview Minimal Paths, Fast Marching and Front Propagation Geodesic Density for tree structures Using Geodesic voting with Radius energy Using Geodesic voting as a prior shape Using Geodesic voting as initial deformable tree 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
9 Geodesic Density 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density One could give a root point and the set of endpoints for each branch. Goal: user gives only one root point. 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
10 Geodesic Density 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
11 Geodesic Density 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density: Biological image 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
12 Geodesic Density: Biological image 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density: Shading Zone Problem 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
13 Geodesic Density: Shading Zone Problem Different solutions proposed: - Second step in each shading zone - Multiple source points - Transport Equation - Adaptive Voting: End points adaptively scattered 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density: Shading Zone Problem Multiple source points 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
14 Geodesic Density: Transport Equation 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density: Transport Equation 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
15 Geodesic Density: Shading Zone Problem Different solutions proposed: - Multiple source points - Second step in each shading zone - End points Scattered in the image 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density Not sensitive to the source point location 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
16 Geodesic Density: Real Biological image 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density: Biological image 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
17 Geodesic Density: Biological image 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density: Real example 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
18 Geodesic Density: from the image boundary Boundary : 4*256 end points 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density: all points From all points : 256*256 end points 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
19 Geodesic Density: adaptive voting Adaptive voting : 1000 end points 19/12/ :12 Laurent COHEN, LJLL, Geodesic Density: adaptive voting Adaptive voting : 1000 end points 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
20 Overview Minimal Paths, Fast Marching and Front Propagation Geodesic Density for tree structures Using Geodesic voting with Radius energy Using Geodesic voting as a prior shape Using Geodesic voting as initial deformable tree 19/12/ :12 Laurent COHEN, LJLL, and centerline (with Y. Rouchdy, ISBI 11) voting using Space + radius distance 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
21 and centerline (with Y. Rouchdy, ISBI 11) voting using Space + radius distance 19/12/ :12 Laurent COHEN, LJLL, and centerline (with Y. Rouchdy, ISBI 11) voting using Space + radius distance 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
22 3D Minimal Path for tubular shapes in 2D 2D in space, 1D for radius of vessel 19/12/ :12 Laurent COHEN, LJLL, and centerline voting using Space + radius distance Different ways of using the voting results. 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
23 and centerline voting using Space + radius distance 19/12/ :12 Laurent COHEN, LJLL, and centerline voting using Space + radius distance 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
24 Overview Minimal Paths, Fast Marching and Front Propagation Geodesic Density for tree structures Using Geodesic voting with Radius energy Using Geodesic voting as a prior shape Using Geodesic voting as initial deformable tree 19/12/ :12 Laurent COHEN, LJLL, and Segmentation with Prior Level set method either edge based or region based 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
25 and Segmentation with Prior Level set initialized with result of voting 19/12/ :12 Laurent COHEN, LJLL, and Segmentation with Prior (with Y. Rouchdy, SSVM 11) Chan Vese Energy including shape Prior given by 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
26 and Segmentation with Prior (with Y. Rouchdy, SSVM 11) Chan Vese Energy including shape Prior given by 19/12/ :12 Laurent COHEN, LJLL, and Segmentation with Prior (with Y. Rouchdy, SSVM 11) Chan Vese Energy including shape Prior given by 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
27 and Segmentation with Prior 3D extension 19/12/ :12 Laurent COHEN, LJLL, and Segmentation 3D extension 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
28 Overview Minimal Paths, Fast Marching and Front Propagation Geodesic Density for tree structures Using Geodesic voting with Radius energy Using Geodesic voting as a prior shape Using Geodesic voting as initial deformable tree 19/12/ :12 Laurent COHEN, LJLL, and Deformable Tree (with Julien Mille, MMBIA 09, ISBI 10) initial image with root point 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
29 and Deformable Tree minimal action map from root point 19/12/ :12 Laurent COHEN, LJLL, and Deformable Tree Initial tree from voting score 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
30 and Deformable Tree Removing unsignificant segments by thresholding the geodesic voting 19/12/ :12 Laurent COHEN, LJLL, and Deformable Tree 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
31 and Deformable Tree Intermediate steps of tree evolution. 19/12/ :12 Laurent COHEN, LJLL, and Deformable Tree final step of tree evolution. 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
32 and Deformable Tree 19/12/ :12 Laurent COHEN, LJLL, and Deformable Tree Energy minimizing Deformable tube 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
33 and Deformable Tree 19/12/ :12 Laurent COHEN, LJLL, Conclusion Minimally interactive tools for vessels and vascular tree segmentation (tubular branching structures) User provides only one initial point Fast and efficient propagation algorithm Voting approach as a powerful tool to find the structure, which can be completed with other approach. 19/12/ :12 Laurent COHEN, LJLL, LJLL, Dec
34 Thank you! Publications on your screen: 19/12/ :12 Laurent COHEN, LJLL, for biomedical image segmentation Laurent D. COHEN Directeur de Recherche CNRS CEREMADE, UMR CNRS 7534 Université Paris-9 Dauphine Place du Maréchal de Lattre de Tassigny Paris, France Some joint works with Y. Rouchdy, and J. Mille. LJLL, Journée thématique maths, image et biomédecine 18 Décembre /12/ :12 Laurent COHEN, LJLL, LJLL, Dec
Fast Marching and Geodesic Methods. Some Applications
Fast Marching and Geodesic Methods. Some Applications Laurent D. COHEN Directeur de Recherche CNRS CEREMADE, UMR CNRS 7534 Université Paris-9 Dauphine Place du Maréchal de Lattre de Tassigny 75016 Paris,
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