The development of the remotely sensed techniques enlarges the applications of the remotesensingimagery. The clustering of high resolution imagery is difficult, due to the fact that the minor objects, such as roads,...
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ISBN:
(纸本)081944684X
The development of the remotely sensed techniques enlarges the applications of the remotesensingimagery. The clustering of high resolution imagery is difficult, due to the fact that the minor objects, such as roads, make the appearance of the same category region non-uniform. This paper proposes a new approach to cluster high resolution remotesensingimagery. The new clustering approach includes three steps as the following: Firstly, eliminate the minor components in the moving windows. Secondly, compute the image features, such as the energy, some high order cumulants and central moments of pixels' values in moving windows. Lastly, apply the BPC neural network, which is combined by a Back-Propagation (BP) neural network and a Competive neural network, to cluster images according to the image features. Two methods, minimum distance method and the K -means method, are compared with the new clustering approach, proposed by this paper, by using SPOT images for clustering residential areas and agricultural areas in the suburbs of Beijing. The experimental results show that the new clustering approach has the higher clustering accuracy.
remote-sensingimage fusion is becoming widely used in object recognition because of complementary nature of images from different sensors. In the past few years, many fusion methods have been introduced, where intens...
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ISBN:
(纸本)081944684X
remote-sensingimage fusion is becoming widely used in object recognition because of complementary nature of images from different sensors. In the past few years, many fusion methods have been introduced, where intensity-hue-saturation transform (IHST)-based fusion method, wavelet transform (WT)-based fusion method and high pass filter (HPF)-based fusion method are commonly used. There are complementarities between the three fusion methods, so this paper presents a new fusion method based on WT, IHST and HPF, which overcomes the shortcomings of the three fusion methods and exploits their strong points. Our new method uses ATT-based fusion method to preserve the spectral information of the original multispectral image, and IHST-based fusion method to improve spatial presentation of the fused image, and HPF-based method to merge the low-frequency part of the panchromatic image with that of the I channel data of the multispectral image in WT domain to enhance spatial information and avoid block effect in WT-based fusion method. Experiment results show that our new method is efficient. It not only preserves the spectral information of the original multispectral image very well, but also enhances spatial presentation of the fused image largely.
作者:
Zequn, GWuhan Univ
Inst Remote Sensing & Informat Engn Wuhan 430079 Peoples R China
The central idea of this paper is that image data mining could be performed directly on the 2D image representation, by applying some scan techniques on the 2D image, which are different than the raster scan. In this ...
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ISBN:
(纸本)081944684X
The central idea of this paper is that image data mining could be performed directly on the 2D image representation, by applying some scan techniques on the 2D image, which are different than the raster scan. In this paper, we present the comparison of spatial data sets using bit sequential format on a unique vector form which converts between one quadrant tree and some sub- quadrant trees. Then, we describe how the bit-vector might be used to generate the associations among scan patterns in which when some object attributes are extracted in a data process, the others are extracted, too.
remotesensingimages acquired by the sensors at platforms near land surface, airplane and satellite, usually have large volume and miscellaneous data formats. So it is not feasible for the users to browse remote sens...
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ISBN:
(纸本)081944684X
remotesensingimages acquired by the sensors at platforms near land surface, airplane and satellite, usually have large volume and miscellaneous data formats. So it is not feasible for the users to browse remotesensingimages and evaluate the quality of images and select the suitable images on Internet. Moreover, it is inefficient to read and transfer remotesensingimages real-timely in a standard image viewer due to their miscellaneous data formats. In order to clear up the problems, the metadata and microimage are extracted from various remotesensingimages, managed by the database management system software, and browsed and evaluated on Internet to decide which images are the real wanted. The process of working includes the 4 steps. 1) Create metadata for the remotesensingimages. The metadata consist of image data format, longitude and latitude of image range, date and, time, spatial resolution, sensor attributes (field of view, bands, performance and precision etc), platform attributes (stand near land surface, airplane or satellite), flight path or orbit attributes of aerial and space observation etc. 2) Create microimage for remotesensingimage. Firstly, the remotesensingimages are projected to the same coordinate system by the geometric correction, so all images can be matched correctly. Then the microimages are built through 1: 10 or 1:5 cubic convolution sampling the corrected images. 3). Build a database to store and manage the metadata and microimages, and create pointers to hyperlink the remotesensingimages self. 4) Develop the browse interface, publish the remotesensingimage base on Internet, and receive the users' order forms. The wanted images will be sent on CDROM if the orders are accepted. The interface is visualized. Here, a color spectrum is used to express the bands. A clock is for time and landscape is for days in one year. And place is located by moving your mouse on the map. The pixel sizes are shown through levels on a pyramid.
Change detection is a key topic in land use/land cover related studies and significant efforts have been made in the development of methods for change detection. In this article a multivariate analysis method based on...
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ISBN:
(纸本)081944684X
Change detection is a key topic in land use/land cover related studies and significant efforts have been made in the development of methods for change detection. In this article a multivariate analysis method based on canonical transformation is introduced into change detection using multi-temporal remotesensingimageries. Afterwards an automatic unsupervised discriminating technique based on the Bayes-Rule of Minimum Error is employed for changed areas identification in the difference image. Experimental results of a case study using Landsat TM imageries are presented to demonstrate the effectiveness of our method.
SAR image segmentation can be converted to a clustering problem in which pixels or small patches are grouped together based on local feature information. In this paper, we present a novel framework for segmentation. T...
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ISBN:
(纸本)081944684X
SAR image segmentation can be converted to a clustering problem in which pixels or small patches are grouped together based on local feature information. In this paper, we present a novel framework for segmentation. The segmentation goal is achieved by unsupervised clustering upon characteristic descriptors extracted from local patches. The mixture model of characteristic descriptor, which combines intensity and texture feature, is investigated. The unsupervised algorithm is derived from the recently proposed Skeleton-Based Data Labeling method. Skeletons are constructed as prototypes of clusters to represent arbitrary latent structures in image data. Segmentation using Skeleton-Based Fuzzy Clustering is able to detect the types of surfaces appeared in SAR images automatically without any user input.
In this paper, we propose a novel and automated line extraction algorithm in multi-spectral images, which fully utilize the complementary information among multi-spectral images. It consists of three main aspects: Fir...
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ISBN:
(纸本)081944684X
In this paper, we propose a novel and automated line extraction algorithm in multi-spectral images, which fully utilize the complementary information among multi-spectral images. It consists of three main aspects: Firstly, edges are extracted from every spectral image. Then, the edge points from all spectral images are grouped into combined line-support regions according to certain fusion rules. Finally, fits the regions and generates the fused lines. The new algorithm is applied to some real multi-spectral images. The experimental results show that the new algorithm is effective.
In this paper, a novel hierarchical image fusion scheme based on wavelet multi-scale decomposition is presented. The basic idea is to perform a wavelet multi-scale decomposition of each source image first, then the wa...
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ISBN:
(纸本)081944684X
In this paper, a novel hierarchical image fusion scheme based on wavelet multi-scale decomposition is presented. The basic idea is to perform a wavelet multi-scale decomposition of each source image first, then the wavelet coefficients of the fused image is constructed using region-based selection and weighted operators according to different fusion rules, finally the fused image is obtained by taking inverse wavelet transform. Ibis approach has been successfully used in image fusion. In addition, with the use of the parameters such as entropy, cross entropy, mutual information, root mean square error, peak-to-peak signal-to-noise ratio, the performance of the fusion scheme is evaluated and analyzed. The experimental results show that the fusion scheme is effectual.
The proceedings contains 108 papers from the conference on SPIE: Third International Symposium on Multispectral imageprocessing and patternrecognition: Part One. The topics discussed include: theory analysis and exp...
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The proceedings contains 108 papers from the conference on SPIE: Third International Symposium on Multispectral imageprocessing and patternrecognition: Part One. The topics discussed include: theory analysis and experimental study on the amount of information in a color night vision system;restoration of color in a remotesensingimage and its quality evaluation;use of discrete chromatic space to tune the image tone in a color image mosaic;an analytical solution to camera motion using the essential matrix;a new technique creates realistic 3D free-form surfaces photographs and paintings and applications of matching Fourier transform to radar refined imaging.
In this paper, the authors proposed a new theory and method, the phase-separation analysis of remotesensing information field of metallogenetic environment for non-model ore deposit prediction. The theory of nonmodel...
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ISBN:
(纸本)081944684X
In this paper, the authors proposed a new theory and method, the phase-separation analysis of remotesensing information field of metallogenetic environment for non-model ore deposit prediction. The theory of nonmodel ore deposit prediction suggests that the forming of ore deposit result from multiple changes of many geological factors;and in a particularly geological environment, the places where tectonic movement of multi-times piled up together probably produce large or giant type deposits;and the existence of great mineralized body maybe lead to some remarkable differences in composition, in structure, in geophysical field and,in geochemical field from the surrounding geological background, even lead to anomalies of biosphere and atmosphere of the earth. Therefore, on the basis of geology and other data, combining RS with GIS, and through decomposing multivariate information fields, feature extracting and seeking anomaly, it is feasible to establish the natural models of ore source bodies to predict related ore deposits correctly.
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