The proper usage and creation of transfer functions for time-varying data sets is an often ignored problem in volume visualization. Although methods and guidelines exist for time-invariant data, little formal study fo...
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The edge and contour details in SAR images are important for subsequent processing tasks. The multiscale geometric analysis method — Nonsubsampled contourlet transform(NSCT) is able to capture the geometric informati...
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The edge and contour details in SAR images are important for subsequent processing tasks. The multiscale geometric analysis method — Nonsubsampled contourlet transform(NSCT) is able to capture the geometric information of SAR images effectively. Describing the aggregation behavior of the neighborhoods coefficients, the scale mixtures of Gaussians model has exhibited favorable performances. A novel SAR image despeckling method is presented by constructing the scale mixtures of Gaussians model of NSCT. This method models the SAR images using the multiscale and multidirection information in NSCT domain. The dependency relationship of NSCT neighborhoods coefficients are also taken into consideration in our model. The speckle noise coefficients are shrinkaged by statistical prior estimation based on SAR image model constructed. Experimental results demonstrate that our method is advantageous at directional information preservation and the speckle restraint.
An information-theoretic approach is used to determine the amount of information that may be safely transferred over a steganographic channel with a passive adversary. A steganographic channel, or stego-channel is a p...
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ISBN:
(纸本)1595930329
An information-theoretic approach is used to determine the amount of information that may be safely transferred over a steganographic channel with a passive adversary. A steganographic channel, or stego-channel is a pair consisting of the channel transition probabilities and a detection function. When a message is sent, it first encounters a distortion (due to the channel), then is subject to inspection by a passive adversary (using the detection function). This paper presents results on the amount of information that may be transferred over an arbitrary stego-channel with vanishing probabilities of error and detection. Copyright 2005 ACM.
Building facade classification by architectural styles allows categorization of large databases of building images into semantic categories belonging to certain historic periods, regions and cultural influences. image...
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Architectural elements are the components and details of buildings. Their unique set, combination, design, construction technique form the architectural style of buildings. Building facade classification by architectu...
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This paper research on a high definition Ship-borne radar and video monitoring system which requires multi-channel TV video and radar video encoding and decoding ability. The real time data transferring is based on RT...
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We propose a novel Markovian segmentation model which takes into account edge information. By construction, the model uses only pairwise interactions and its energy is submodular. Thus the exact energy minima is obtai...
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Pyramid schemes are described that make use of relations between the different resolutions of pictorial entities, such as intensity and edge. The presented system consists of a 3*3/2 intensity and a 2*2/2 curve pyrami...
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Pyramid schemes are described that make use of relations between the different resolutions of pictorial entities, such as intensity and edge. The presented system consists of a 3*3/2 intensity and a 2*2/2 curve pyramid. At every level, the two square grids are dual to each other. Contour operators generate the symbolic curve codes in the base of the curve pyramid. When the operators are moved several steps up and down in the curve pyramid, short contour segments are removed from the base. The remaining curves are used to preserve the contours at the reduced levels of the intensity pyramid. Experiences from different variants of the dual concept are reported.< >
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