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The Gray Processing of Moon Digital Orthophoto Map
Applied Mechanics and Materials, 2012Considering the mosaic result of the lunar DOM (Digital Orthophoto Map) produced by China's “CE-1” satellite, there usually exists a sharp gray jump beside the joining line. As to a strip image, the gray distribution may be uneven because of the light changing or position difference during photographing.
Wu Jian Xu +3 more
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On MAP optimality of gray-scale morphological filters
Proceedings of 3rd IEEE International Conference on Image Processing, 2002The estimation of finite-gray-scale digital images corrupted by supremum/infimum noise is posed within the statistical framework of discrete random functions (DRF). It is shown that morphological operators such as openings, closings, supremum of openings and infimum of closings are optimal Maximum-A-Posteriori (MAP) estimators under the assumption that
B. Singh, M.U. Siddigi
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Gray-scale maps with a personal computer
Computers & Geosciences, 1989Abstract The presentation of areally distributed data on maps with gray scales is an excellent way to enhance important features of the data. The chance of producing these types of maps with a personal computer and a standard matrix printer, makes it possible to obtain good quality maps at low cost and with limited computer facilities.
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Robust color-to-gray via nonlinear global mapping
ACM SIGGRAPH Asia 2009 papers, 2009This paper presents a fast color-to-gray conversion algorithm which robustly reproduces the visual appearance of a color image in grayscale. The conversion preserves feature discriminability and reasonable color ordering, while respecting the original lightness of colors, by simple optimization of a nonlinear global mapping.
Yongjin Kim +3 more
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Semi-Invariant Reversible Mapping from Color to Gray
Journal of Imaging Science and Technology, 2008This paper proposes a reversible algorithm to convert color images to gray images while keeping chroma and spatial resolution. The original method of Braun and de Queiroz [Ref. 5] had theoretical problems such as deterioration in both chroma and spatial resolution.
Fuminori Nohara +2 more
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Simplified universal soft demapper for gray-mapped constellation
2015 International Wireless Communications and Mobile Computing Conference (IWCMC), 2015Bit-interleaved coded modulation (BICM) systems with high order constellations and signal space diversity (SSD) are deployed in DVB-T2 and recommended for potential use in 3GPP-LTE standards for its high spectral efficiency and diversity gain. However, in such systems, previous soft demapping algorithms show either extremely high computational ...
Shuang Chen, Kewu Peng, Fang Yang
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Sequences with good correlation property using Gray mapping
IEEE Information Theory Workshop 2010 (ITW 2010), 2010This paper provides two construction methods of sequence using the Gray mapping. In the first method, a quaternary sequence with R max = 2 for N ≡ 2 (mod 4) which is the same as the best known Rmax, is proposed. The sequence is constructed by the Gray mapping of a binary sequence with even period and its half-period shift.
Ji-Woong Jang +3 more
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QTL mapping of resistance to gray leaf spot in maize
Theoretical and Applied Genetics, 2012Gray leaf spot (GLS), caused by the causal fungal pathogen Cercospora zeae-maydis, is one of the most serious foliar diseases of maize worldwide. In the current study, a highly resistant inbred line Y32 and a susceptible line Q11 were used to produce segregating populations for both genetic analysis and QTL mapping. The broad-sense heritability (H (2))
Yan, Zhang +5 more
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QTL mapping of resistance to gray leaf spot in ryegrass
Theoretical and Applied Genetics, 2005Gray leaf spot (GLS) is a serious fungal disease caused by Magnaporthe grisea, recently reported on perennial ryegrass (Lolium perenne L.), an important turf grass and forage species. This fungus also causes rice blast and many other grass diseases. Rice blast is usually controlled by host resistance, but durability of resistance is a problem.
J, Curley +5 more
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