Barycentric Screening
نویسندگان
چکیده
color halftoning, dithering, barycentric coordinates. Monochrome dither halftoning is a gray-scale image rendering procedure where gray-levels in an image are compared against a periodic threshold array, placing a Black dot in every location whose gray-level is smaller than the corresponding threshold value. Current generalizations to color printing result in Cartesian thresholding procedures, namely RGB values are compared component-wise to trivariate thresholds. In this report we develop a color dithering procedure based on a non-Cartesian coordinate system. Its main advantage over the traditional Cartesian thresholding is that it allows the rendition of solid color patches while using no more than a preselected quadruple of colors, thereby enabling a reduction of halftone noise.
منابع مشابه
Invariance of the barycentric subdivision of a simplicial complex
In this paper we prove that a simplicial complex is determined uniquely up to isomorphism by its barycentric subdivision as well as its comparability graph. We also put together several algebraic, combinatorial and topological invariants of simplicial complexes.
متن کاملOn Barycentric-Magic Graphs
Let $A$ be an abelian group. A graph $G=(V,E)$ is said to be $A$-barycentric-magic if there exists a labeling $l:E(G)longrightarrow Asetminuslbrace{0}rbrace$ such that the induced vertex set labeling $l^{+}:V(G)longrightarrow A$ defined by $l^{+}(v)=sum_{uvin E(G)}l(uv)$ is a constant map and also satisfies that $l^{+}(v)=deg(v)l(u_{v}v)$ for all $v in V$, and for some vertex $u_{v}$ adjacent t...
متن کاملBarycentric-sum problems: a survey
Let G be a finite abelian group. A sequence in G is barycentric if it contains one element “average” of its terms. We give a survey of results and open problems concerning sufficient conditions for the existence of barycentric sequences. Moreover values and open problems on the k-barycentric Davenport constant BD(k, G), the barycentric Davenport constant BD(G), the strong k-barycentric Davenpor...
متن کاملOn Barycentric Constants
Let G be an abelian group with n elements. Let S be a sequence of elements of G, where the repetition of elements is allowed. Let |S| be the cardinality, or the length of S. A sequence S ⊆ G with |S| ≥ 2 is barycentric or has a barycentric-sum if it contains one element aj such that ∑ ai∈S ai = |S|aj . This paper is a survey on the following three barycentric constants: the k-barycentric Olson ...
متن کاملA Complex View of Barycentric Mappings
Barycentric coordinates are very popular for interpolating data values on polyhedral domains. It has been recently shown that expressing them as complex functions has various advantages when interpolating two-dimensional data in the plane, and in particular for holomorphic maps. We extend and generalize these results by investigating the complex representation of real-valued barycentric coordin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999