Fig. 2From: Object contour tracking via adaptive data-driven kernelIllustration of the level set kernel mechanism. d and e are the corresponding three-dimensional map of the level set function and kernel, the frame numbers of f are 0, 87, and 107, respectively, in hand sequence. a Target contour. b Level set function. c Level set kernel. f Tracking out-plane deforming target with constant kernel shapeBack to article page