this work presents the necessary steps to obtain the quantitative parameters of a superficial drainage basin, using digital imageprocessing techniques such as segmentation and mathematical morphology.
ISBN:
(纸本)0769513301
this work presents the necessary steps to obtain the quantitative parameters of a superficial drainage basin, using digital imageprocessing techniques such as segmentation and mathematical morphology.
A tool created withthe aim of contributing to the teaching of imageprocessing techniques is presented. It allows the specification of filters in a simple and intuitive manner. Being a Java application, the system is...
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ISBN:
(纸本)0769513301
A tool created withthe aim of contributing to the teaching of imageprocessing techniques is presented. It allows the specification of filters in a simple and intuitive manner. Being a Java application, the system is portable and runs in many different environments.
this paper presents an approach for 3D reconstruction of X-ray tomographic images of coronal loops, observed on the solar atmosphere by the Japanese satellite Yohkoh. In this approach, the intermediate cross-sections ...
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this paper presents an approach for 3D reconstruction of X-ray tomographic images of coronal loops, observed on the solar atmosphere by the Japanese satellite Yohkoh. In this approach, the intermediate cross-sections images of the magnetic loop are generated withimage morphing controlled by a Bezier curve in arc shape. Due to the high computational costs involved in the processing and visualization of solar images, a parallel application for 3D reconstruction of a coronal loop was implemented to execute in the Atlas parallel system. (c) 2006 Elsevier B.V. All rights reserved.
Computational processing capacity allows the development of sophisticated interactive animation with different kinds of media resources. computer games are examples of multimedia software with entertainment and high s...
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ISBN:
(纸本)076951846X
Computational processing capacity allows the development of sophisticated interactive animation with different kinds of media resources. computer games are examples of multimedia software with entertainment and high sophistication characteristics. Such technology allied with cognitive concepts can be used to implement educational software. this poster describes the implementation of a software to teach computergraphics concepts based on entertainment and cognitive criteria.
the present work discusses the importance of using different elements to accomplish a better learning of computergraphics related concepts, and how to make this information available in a way accessible for students ...
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ISBN:
(纸本)076951846X
the present work discusses the importance of using different elements to accomplish a better learning of computergraphics related concepts, and how to make this information available in a way accessible for students that is useful as learning support tools. We propose and assess the use of a resource site in order to increase the interaction between the courses in the area.
this paper deals with content-based image retrieval. When the user is looking for large categories, statistical classification techniques are efficient as soon as the training set is large enough. We introduce a two-s...
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this paper deals with content-based image retrieval. When the user is looking for large categories, statistical classification techniques are efficient as soon as the training set is large enough. We introduce a two-step-exploration, classification-interactive strategy designed for category retrieval. the first step aims at getting a useful initial training set for the classification step. A stochastic image selection process is used instead of the usual strategy based on a similarity score ranking. this process is dedicated to explore the database in order to collect examples as various as possible of the searched category. the second step aims at providing the best classification between relevant and irrelevant images. Based on SVM, the classification applies an active learning strategy through user interaction. A quality assessment is carried out on the ANN and COREL databases in order to compare and validate our approach. (c) 2006 Elsevier B.V. All rights reserved.
the identification and classification of motion patterns in point trajectories has been an important issue in understanding and representing dynamic scenes. this paper proposes an unsupervised approach to identify coh...
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ISBN:
(纸本)9780769529967
the identification and classification of motion patterns in point trajectories has been an important issue in understanding and representing dynamic scenes. this paper proposes an unsupervised approach to identify coherent motion in video. Instead of producing a spatio-temporal segmentation of the raw data, the proposed method analyzes point trajectories along the video sequence to identify sets of points that move coherently. this new way of extracting motion information from videos potentially can be used in different areas of imageprocessing and computer vision.
We present a technique in image segmentation based on a hierarchical analysis of scale-space. the image hierarchy is the tree of critical lakes and provides a set of nested partitions. We analyze the scale-space from ...
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ISBN:
(纸本)076951846X
We present a technique in image segmentation based on a hierarchical analysis of scale-space. the image hierarchy is the tree of critical lakes and provides a set of nested partitions. We analyze the scale-space from fine to coarse levels according to specific attributes.
Inpainting and denoising are two important tasks in the field of imageprocessing with broad applications in image and vision analysis. In this paper. we present a new approach for image restoration. Our method simult...
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Inpainting and denoising are two important tasks in the field of imageprocessing with broad applications in image and vision analysis. In this paper. we present a new approach for image restoration. Our method simultaneously fills in missing, corrupted, or undesirable information while it removes noise. the denoising is performed by the smoothing equation working inside and outside of the inpainting domain but in completely different ways. Inside the inpainting domain, the smoothing is carried out by the Mean Curvature Flow, while the smoothing of the outside of the inpainting domain is carried out in a way as to encourage smoothing within a region and discourage smoothing across boundaries. Besides smoothing, the approach here presented permits the transportation of available information from the outside towards the inside of the inpainting domain. this combination permits the simultaneous use of filling-in and differentiated smoothing of different regions of an image. the experimental results show the effective performance of the combination of these two procedures in restoring scratched photos, disocclusion (or removal of entire objects from the image) in vision analysis and text removal from images. (c) 2006 Elsevier B.V. All rights reserved.
In this work we apply reversible integer wavelet transform to lossless compression of computerized tomography projections (sinograms). Lossy image compression methods can achieve high compression ratios, but sinograms...
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ISBN:
(纸本)0769513301
In this work we apply reversible integer wavelet transform to lossless compression of computerized tomography projections (sinograms). Lossy image compression methods can achieve high compression ratios, but sinograms should not loose information during compression process to not affect the image reconstruction.
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