Figure 3From: Multiscale texture retrieval based on low-dimensional and rotation-invariant features of curvelet transformA curvelet function for specific scale, rotation, and translation. (a) 3D view of a Mexican hat based curvelet. (b) Mexican hat curvelet, top view. (c) 3D view of a Meyer-based curvelet. (d) Meyer curvelet, top view.Back to article page