In the paper, error resilient coding strategies are proposed and integrated with the high performance significance-linked connected component analysis (SLCCA) wavelet image codec. First, the source bitstream is packet...
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ISBN:
(纸本)0769507514
In the paper, error resilient coding strategies are proposed and integrated with the high performance significance-linked connected component analysis (SLCCA) wavelet image codec. First, the source bitstream is packetized so that the error propagation within the bitstream is minimized. Second, hierarchical resynchronization is applied, i.e., resynchronization markers are inserted in the bitstream after each bit-plane and possibly per each scale Or subband. Third, the significance-links that exploit the cross-scale dependency of wavelet coefficients are reduced. Finally, bit-plane-wise unequal error protection is applied, with the parity bits being exponentially distributed among bit-planes. Extensive performance evaluation over a binary symmetric channel demonstrates the high error resilience and efficiency of the integrated joint source-channel coding strategies with the SLCCA source codec.
This paper presents an architecture of a system for content-based retrieval of remotesensingimages (RSI). This architecture relies on combining results from imageprocessing, patternrecognition and Multimedia Datab...
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This paper presents an architecture of a system for content-based retrieval of remotesensingimages (RSI). This architecture relies on combining results from imageprocessing, patternrecognition and Multimedia Databases. RSI retrieval from a database is based on the notion of image similarity. A novel aspect in the paper is that the degree of similarity among images is refined during a query session, and is computed dynamically based on user-provided texture and color imagepatterns, as well as information on how images were pre-processed before being stored in the database.
The field of wavelets has opened up new opportunities;for the compression of satellite sensor imagery. This paper examines the influence of wavelet compression on the automatic classification of urban environments. Ai...
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ISBN:
(纸本)0769507514
The field of wavelets has opened up new opportunities;for the compression of satellite sensor imagery. This paper examines the influence of wavelet compression on the automatic classification of urban environments. Ail borne laser scanning data is introduced as an additional channel alongside the spectral channels of colour infrared imagery. This effectively integrates the local height and multi-spectral information sour-ces. To incorporate conte,ut information, the feature base is expanded to include both spectral and non-spectral features. A maximum likelihood classification approach is then applied. It is demonstrated that the classification of urban scenes is considerably improved by fusing multi-spectral and geometric data sets. The fused imagery is then systematically compressed (channel by channel) at compression rates ranging from 5 to 100 using a wavelet-based algorithm. The compressed imagery is then classified using the approach described here-above. Analysis of the results obtained indicates that a compression rate of up to 20 can convieniently be employed without adversely affecting the segmentation results.
The goal of this paper is twofold. First, we present a supervised fuzzy c-mean (SFCM) classifier for the classification of high dimensional data. Comparisons with conventional FCM clustering technique and Bayesian cla...
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In this paper the method of image compression is presented. It is designed for data processing in real-time systems of remotesensing. In the midpoint there are compression algorithm based on component transformation ...
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ISBN:
(纸本)0769507506
In this paper the method of image compression is presented. It is designed for data processing in real-time systems of remotesensing. In the midpoint there are compression algorithm based on component transformation with pixel interpolation and algorithm of stabilization of encoded image forming speed, which provide high compression ratio, stable speed of an output data flow and controlled error of image reconstruction.
This paper presents an architecture of a system for content-based retrieval of remotesensingimages (RSI). This architecture relies on combining results from imageprocessing, patternrecognition and multimedia datab...
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This paper presents an architecture of a system for content-based retrieval of remotesensingimages (RSI). This architecture relies on combining results from imageprocessing, patternrecognition and multimedia databases. RSI retrieval from a database is based on the notion of image similarity. A novel aspect in the paper is that the degree of similarity among images is refined during a query session, and is computed dynamically based on user-provided texture and color imagepatterns, as well as information on how images were pre-processed before being stored in the database.
We present a fully unsupervised clustering algorithm in order to overcome the problem of a priori defining the number of clusters. We propose to optimize an objective function which is the sum of two terms. The first ...
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ISBN:
(纸本)0769507506
We present a fully unsupervised clustering algorithm in order to overcome the problem of a priori defining the number of clusters. We propose to optimize an objective function which is the sum of two terms. The first one is a generalization of intra-cluster distance within the framework of fuzzy sets. The second one is an entropy term. Our clustering algorithm has been applied to the problem of clustering both remotesensing data and medical images.
The goal of this paper is twofold. First, we present a supervised fuzzy c-mean (SFCM) classifier for the classification of high dimensional data. Comparisons of the conventional FCM clustering technique and Bayesian c...
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ISBN:
(纸本)0769507506
The goal of this paper is twofold. First, we present a supervised fuzzy c-mean (SFCM) classifier for the classification of high dimensional data. Comparisons of the conventional FCM clustering technique and Bayesian classification technique are also presented. Next, we present a two-step classifier in which the proposed SFCM and Bayesian algorithms are used in a cooperative way such that classification results of the SFCM algorithm are used to compute the prior probabilities required for the Bayesian classifier. Classification results of the three algorithms are presented on simulated and real remotesensing multispectral data. The results obtained show improvements in the classification accuracy and reliability using the two-step algorithm.
An optimal line detector for the one-dimensional case is derived from Canny's criteria (1986). The detector is extended to the two-dimensional case by operating separately in the x and y directions. An efficient i...
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ISBN:
(纸本)0769507506
An optimal line detector for the one-dimensional case is derived from Canny's criteria (1986). The detector is extended to the two-dimensional case by operating separately in the x and y directions. An efficient implementation using an infinite impulse response (iiR) filter is provided. This implementation has an additional advantage that increasing the filter scale affects neither temporal nor spatial complexity. Our detector is faster than the Gaussian used by Steger (1998); e.g., when the scale is 3 our detector is 33 times faster. Experimental results using real images demonstrate the validity of the algorithm.
作者:
Garcia-Consuegra, J.Cisneros, G.Martinez, A.
Castilla-La Mancha University Campus Universitario s/n 02071 Albacete Spain Grupo de Tratamiento de Imágenes
Universidad Politécnica de Madrid Ciudad Universitaria 28040 Madrid Spain
Castilla-La Mancha University Campus Universitario s/n 02071 Albacete Spain
In this paper we provide a solution to a common problem in remotesensing when woody crops (almond and olive fields, vineyards, and so on) must be located and discriminated. Experience has taught us that, currently, t...
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