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Blind speckle decorrelation for SAR image despeckling / Alessandro Lapini in IEEE Transactions on geoscience and remote sensing, vol 52 n° 2 (February 2014)
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Titre : Blind speckle decorrelation for SAR image despeckling Type de document : Article/Communication Auteurs : Alessandro Lapini, Auteur ; Tiziano Bianchi, Auteur ; Fabrizio Argenti, Auteur ; Luciano Alparone, Auteur Année de publication : 2014 Article en page(s) : pp 1044 - 1058 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] chatoiement
[Termes IGN] décorrélation
[Termes IGN] filtre de déchatoiement
[Termes IGN] image radar moiréeRésumé : (Auteur) In the past few decades, several methods have been developed for despeckling synthetic aperture radar (SAR) images. A considerable number of them have been derived under the assumption of a fully-developed speckle model in which the multiplicative speckle noise is supposed to be a white process. Unfortunately, the transfer function of SAR acquisition systems can introduce a statistical correlation, which decreases the despeckling efficiency of such filters. In this paper, a whitening method is proposed for processing a complex image acquired by a SAR system. We demonstrate that the proposed approach allows the successful application of classical despeckling algorithms. First, we perform an estimation of the SAR system frequency response based on some statistical properties of the acquired image and by using realistic assumptions. Then, a decorrelation process is applied on the acquired image, taking into account the presence of point targets. Finally, the image is despeckled. The experimental results show that the despeckling filters achieve better performance when they are preceded by the proposed whitening method; furthermore, the radiometric characteristics of the image are preserved. Numéro de notice : A2014-077 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2246838 En ligne : https://doi.org/10.1109/TGRS.2013.2246838 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32982
in IEEE Transactions on geoscience and remote sensing > vol 52 n° 2 (February 2014) . - pp 1044 - 1058[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-2014021 RAB Revue Centre de documentation En réserve L003 Disponible LiDAR-derived surface roughness texture mapping: Application to mount St. Helens Pumice Plain deposit analysis / Patrick L. Whelley in IEEE Transactions on geoscience and remote sensing, vol 52 n° 1 tome 2 (January 2014)
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Titre : LiDAR-derived surface roughness texture mapping: Application to mount St. Helens Pumice Plain deposit analysis Type de document : Article/Communication Auteurs : Patrick L. Whelley, Auteur Année de publication : 2014 Article en page(s) : pp 426 - 438 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] alluvion
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] montagne
[Termes IGN] plaine
[Termes IGN] rugosité du sol
[Termes IGN] Saint-Helens, Mont
[Termes IGN] semis de points
[Termes IGN] texture d'image
[Termes IGN] volcanRésumé : (Auteur) Statistical measures of patterns (textures) in surface roughness are used to quantitatively differentiate volcanic deposit facies on the Pumice Plain, on the northern flank of Mount St. Helens (MSH). Surface roughness values are derived from a Light Detection and Ranging (LiDAR) point cloud collected in 2004 from a fixed-wing airborne platform. Patterns in surface roughness are characterized using co-occurrence texture statistics. Pristine-pyroclastic, reworked-pyroclastic, mudflow, boulder beds, eroded lava flows, braided streams, and other units within the Pumice Plain are all found to have significantly distinct roughness textures. The MSH deposits are reasonably accessible, and the textural variations have been verified in the field. Results of this work indicate that by affecting the distribution of large clasts and tens-of-meter scale landforms, modification of pyroclastic deposits by lahars alters the morphology of the surface in detectable quantifiable ways. When a lahar erodes a pyroclastic deposit, surface roughness increases, as does the randomness in the deposit surface. Conversely, when a lahar deposits material, the resulting landforms are less rough but more random than pristine pumice-rich pyroclastic deposits. By mapping these relationships and others, volcanic deposit facies can be differentiated. This new method of mapping, based on roughness texture, has the potential to aid mapping efforts in more remote regions, both on this planet and elsewhere in the solar system. Numéro de notice : A2014-040 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2241443 En ligne : https://doi.org/10.1109/TGRS.2013.2241443 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32945
in IEEE Transactions on geoscience and remote sensing > vol 52 n° 1 tome 2 (January 2014) . - pp 426 - 438[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-2014011B RAB Revue Centre de documentation En réserve L003 Disponible
Titre : OpenGL ES 3.0 programming guide Type de document : Guide/Manuel Auteurs : Dan Ginsburg, Auteur ; Budirijanto Purnomo, Auteur Mention d'édition : second edition Editeur : Londres, Paris, New York, Amsterdam, ... : Addison-Wesley Année de publication : 2014 Collection : Graphics programming Importance : 516 p. Format : 18 x 23 cm ISBN/ISSN/EAN : 978-0-321-93388-1 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Informatique
[Termes IGN] environnement de développement
[Termes IGN] OpenGL ES
[Termes IGN] texture d'imageRésumé : (Editeur) OpenGL® ES™ is the industry’s leading software interface and graphics library for rendering sophisticated 3D graphics on handheld and embedded devices. The newest version, OpenGL ES 3.0, makes it possible to create stunning visuals for new games and apps, without compromising device performance or battery life. In the second edition of this book, the authors cover the entire API and Shading Language. They carefully introduce OpenGL ES 3.0 features such as shadow mapping, instancing, multiple render targets, uniform buffer objects, texture compression, program binaries, and transform feedback. Through detailed, downloadable C-based code examples, you’ll learn how to set up and program every aspect of the graphics pipeline. Step by step, you’ll move from introductory techniques all the way to advanced per-pixel lighting and particle systems. Throughout, you’ll find cutting-edge tips for optimizing performance, maximizing efficiency with both the API and hardware, and fully leveraging OpenGL ES 3.0 in a wide spectrum of applications. All code has been built and tested on iOS 7, Android 4.3, Windows (OpenGL ES 3.0 Emulation), and Ubuntu Linux, and the authors demonstrate how to build OpenGL ES code for each platform. Note de contenu : Chapter 1: Introduction to OpenGL ES 3.0
Chapter 2: Hello Triangle: An OpenGL ES 3.0 Example
Chapter 3: An Introduction to EGL
Chapter 4: Shaders and Programs
Chapter 5: OpenGL ES Shading Language
Chapter 6: Vertex Attributes, Vertex Arrays, and Buffer Objects
Chapter 7: Primitive Assembly and Rasterization
Chapter 8: Vertex Shaders
Chapter 9: Texturing
Chapter 10: Fragment Shaders
Chapter 11: Fragment Operations
Chapter 12: Framebuffer Objects
Chapter 13: Sync Objects and Fences
Chapter 14: Advanced Programming with OpenGL ES 3.0
Chapter 15: State Queries
Chapter 16: OpenGL ES Platforms
Appendix A: GL_HALF_FLOAT
Appendix B: Built-In Functions
Appendix C: ES Framework APINuméro de notice : 22076 Affiliation des auteurs : non IGN Thématique : INFORMATIQUE Nature : Manuel informatique Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=47089 Remote sensing image segmentation by combining spectral and texture features / H. Li in IEEE Transactions on geoscience and remote sensing, vol 52 n° 1 tome 1 (January 2014)
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Titre : Remote sensing image segmentation by combining spectral and texture features Type de document : Article/Communication Auteurs : H. Li, Auteur Année de publication : 2014 Article en page(s) : pp 16 - 16 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse combinatoire (maths)
[Termes IGN] appariement d'histogramme
[Termes IGN] image spectrale
[Termes IGN] segmentation d'image
[Termes IGN] texture d'image
[Termes IGN] valeur radiométriqueRésumé : (Auteur) We present a new method for remote sensing image segmentation, which utilizes both spectral and texture information. Linear filters are used to provide enhanced spatial patterns. For each pixel location, we compute combined spectral and texture features using local spectral histograms, which concatenate local histograms of all input bands. We regard each feature as a linear combination of several representative features, each of which corresponds to a segment. Segmentation is given by estimating combination weights, which indicate segment ownership of pixels. We present segmentation solutions where representative features are either known or unknown. We also show that feature dimensions can be greatly reduced via subspace projection. The scale issue is investigated, and an algorithm is presented to automatically select proper scales, which does not require segmentation at multiple-scale levels. Experimental results demonstrate the promise of the proposed method. Numéro de notice : A2014-034 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2012.2234755 En ligne : https://doi.org/10.1109/TGRS.2012.2234755 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32939
in IEEE Transactions on geoscience and remote sensing > vol 52 n° 1 tome 1 (January 2014) . - pp 16 - 16[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-2014011A RAB Revue Centre de documentation En réserve L003 Disponible Challenges in adapting example-based texture synthesis for panoramic map creation: a case study / Helen Jenny in Cartography and Geographic Information Science, vol 40 n° 4 (September 2013)
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Titre : Challenges in adapting example-based texture synthesis for panoramic map creation: a case study Type de document : Article/Communication Auteurs : Helen Jenny, Auteur ; Bernhard Jenny, Auteur Année de publication : 2013 Article en page(s) : pp 297 - 304 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie
[Termes IGN] déformation géométrique
[Termes IGN] image panoramique
[Termes IGN] peinture
[Termes IGN] synthèse d'image
[Termes IGN] texture d'imageRésumé : (Auteur) Panoramic hiking and skiing maps are popular among tourists and map collectors. Such three-dimensional (3D) maps allow for easy orientation and provide the observer with an immersive impression of the landscape to be discovered or remembered. The most impressive panoramic masterpieces are almost exclusively painted manually or with minor digital tool support. Software packages that allow modern cartographers to create 3D maps of comparable visual quality (semi-) automatically are currently not available. Computer graphics has developed a number of methods for painterly rendering, including imitating the characteristics of a panorama artist's brush stroke and raster-based methods that synthesize new texture from examples. In this article, the latter approach is explored, and the idea of creating terrain textures for arbitrary regions by reassembling them from pieces of scanned hand-painted masterworks is pursued. Panorama painters vary the appearance of land cover depending on terrain characteristics and viewing parameters. This article suggests how the example-based texture synthesis approach could be adapted to accommodate such dependencies. A case study of transferring the appearance of H.C. Berann's hand-painted panorama of the Swiss Jungfrau region to a digital panorama of a different region is presented. The case study shows that a number of previously unanticipated hurdles are encountered when using hand-painted panoramas as input to an example-based texture synthesis algorithm. By identifying the challenges of applying texture-by-example to panoramic map making and by suggesting possible solutions, the authors aim to promote the creation of more visually appealing and legible digital panoramic maps. Numéro de notice : A2013-761 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2013.795001 En ligne : https://doi.org/10.1080/15230406.2013.795001 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32897
in Cartography and Geographic Information Science > vol 40 n° 4 (September 2013) . - pp 297 - 304[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 032-2013041 RAB Revue Centre de documentation En réserve L003 Disponible A synergistic approach for recovering occlusion-free textured 3D maps of urban facades from heterogeneous cartographic data / Karim Hammoudi in International journal of advanced robotic systems, vol 10 (2013)
PermalinkTexture classification of PolSAR data based on sparse coding of wavelet polarization textons / Chu He in IEEE Transactions on geoscience and remote sensing, vol 51 n° 8 (August 2013)
PermalinkForest biomass estimation using texture measurements of high-resolution dual-polarization C-band SAR data / Latifur Rahman Sarker in IEEE Transactions on geoscience and remote sensing, vol 51 n° 6 Tome 1 (June 2013)
PermalinkTexture augmented detection of macrophyte species using decision trees / Cameron Proctor in ISPRS Journal of photogrammetry and remote sensing, vol 80 (June 2013)
PermalinkAccroissement stochastique de la résolution spatiale des traceurs géophysiques de l'océan : application aux observations satellitaires de la température de surface de l'océan / Brahim Boussidi in Revue Française de Photogrammétrie et de Télédétection, n° 202 (Avril 2013)
PermalinkContribution of texture and red-edge band for vegetated areas detection and identification / Arnaud Le Bris (2013)
PermalinkOrthorectification de surfaces complexes acquises par lasergrammétrie et photogrammétrie dans le cadre des travaux de modélisation archéologique de l’église de Dugny / Hélène Macher (2013)
PermalinkReconnaissance de bâtiments et localisation de photographies au moyen d'un descripteur de texture / W. Suleiman in Revue internationale de géomatique, vol 22 n° 3 (septembre - novembre 2012)
PermalinkVisualisation 3D de terrain texturé : préservation au niveau du pixel des qualités géométriques et colorimétriques, une méthode temps réel, innovante et simple / T.V. Lê in Revue internationale de géomatique, vol 22 n° 3 (septembre - novembre 2012)
PermalinkCreating 3D models of major cities, improving speed and cost-efficiency / A. Yakubenko in GIM international, vol 26 n° 7 (July 2012)
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