β Scribed by Jean Ponce
No coin nor oath required. For personal study only.
Following Rosenfeld, we compare Blum, Brooks, and Brady ribbons. We prove that Blum and Brady ribbons are not, in general, Brooks ribbons. Conversely, we prove that Brooks ribbons are, in general, neither Blum nor Brady ribbons. For Blum and Brady ribbons, it is in principle trivial to decide whether two contour points may form a ribbon pair: they have to form a local symmetry. This property is not true for Brooks ribbons. It is possible to characterize locally the pairs of contour points which form a Brooks ribbon pair? Using the curvature of the contour of a Brooks ribbon, we show that the answer to this question is yes for some classes of Brooks ribbons, including skewed symmetries. This result is used in an implemented algorithm for finding skewed symmetries in an image, and examples of segmentation of real images are given, 0 1990 Academic Press, IX.
π SIMILAR VOLUMES
## Abstract Among the reconstruction methods for threeβdimensional information, methods are known for extracting the axes of skewed symmetry that place constraints on the orientation of the plane in space. Since skewed symmetry loses the symmetric nature for the most part, the many earlier methods
The quasi-one dimensional (Q1D) Er 3+ -Yb 3+ codoped single-crystal MoO 3 ribbons with width range from 1 to 5 ΞΌm, and maximum length about 30 ΞΌm have been synthesized by the vapor transport method. The samples were characterized using X-ray diffraction, scanning electron microscopy, transmission el