A Combined Random Forests and Active Contour Model Approach for Fully Automatic Segmentation of the Left Atrium in Volumetric MRI

Figure 2

A 2D illustration of the local and contextual features learning scheme. The red rectangle indicated a neighborhood around the center voxel . (a) : Local features are captured from a scalable local region centered at , within the neighborhood , and are fed into the contour evolution stage. (b) : Contextual features are captured from randomly displaced and randomly scaled local region , and from , within the neighborhood , and are fed into the voxel classification stage.

(a)

(b)