Fig. 1From: Anisotropic mesh adaptation for image representationSketch of triangular element K and its reference element \(\hat K\) for finite element interpolation, where \(\hat K\) is an isosceles right triangle with vertices \(\hat {\textbf {a}}_{1} (0,0)\), \(\hat {\textbf {a}}_{2} (1,0)\), and \(\hat {\textbf {a}}_{3} (0,1)\) Back to article page