منابع مشابه
Marching Simplices
A multi-dimensional algorithm for surface extraction from a structured domain is presented. Topological information is used to split the n-cubes into simplices which are used to extract the possible configurations of new surface elements. The algorithm is intended to complement to the existing surface extraction algorithms, which are specialized to deal with a set dimension, while this algorith...
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Marching Ridges is an algorithm for finding ridges of measurement functions defined for images, in which the ridges are defined as level sets of first derivatives of the measurement functions. Marching Ridges is both specific in its application to 2D and 3D medical images for the purpose of finding cores, and general in its theoretical application to finding ridges of intensity, boundary and me...
متن کاملDifferential Ray Marching
Several participating media rendering algorithms are based on ray marching: they integrate the variations of radiance along the volume covered by the participating media by splitting the path of light into segments and sampling light contribution at each of those segments. This paper revisits the concept of ray marching not as an integration technique, but as the application of a numerical meth...
متن کاملEdge-Constrained Marching Triangles
Marching triangles is a method for producing a polygon mesh surface approximation composed of triangular facets which are approximately equilateral. This paper improves the Marching Triangles algorithm where the inputs are multiple range images of scenes. C discontinuities (fold edges) are detected and used to constrain the final triangulation, thus increasing the accuracy of the mesh at sharp ...
متن کاملCohort studies: marching forward.
B ecause of their well-documented advantages, randomized controlled trials (RCTs) represent the gold standard for testing hypotheses in medical research. However, RCTs are not ideal for addressing certain research questions (e.g., the risk for renal insufficiency associated with alcohol intake). In addition, conducting a properly designed RCT often requires substantial time and resources. For t...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1917
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(01)56230-3