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The digital aerial photography revolution / S. Cassettari in Geoinformatics, vol 11 n° 4 (01/06/2008)
[article]
Titre : The digital aerial photography revolution Type de document : Article/Communication Auteurs : S. Cassettari, Auteur Année de publication : 2008 Article en page(s) : pp 36 - 41 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] diffusion par internet
[Termes IGN] histoire
[Termes IGN] image aérienne
[Termes IGN] image numérique
[Termes IGN] mercatique
[Termes IGN] photogrammétrie numérique
[Termes IGN] photographie numérique
[Termes IGN] Royaume-UniRésumé : (Auteur) In this article, the development of digital photography in the UK from the 1980's onward are charted. It draws on the author's own experiences as someone who has been involved throughout this period. He states that in the last 20 years, digital aerial imagery has come a very long way, since it has developed from a niche product used by a few specialists to an information source with broad appeal to both professionals and consumers, that is quickly and cheaply accessible. In the short term and beyond, the prospects are very good, with a continuing role for those business innovators that have brought everyone this far. Copyright GEOinformatics Numéro de notice : A2008-242 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29237
in Geoinformatics > vol 11 n° 4 (01/06/2008) . - pp 36 - 41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 262-08041 SL Revue Centre de documentation Revues en salle Disponible The influence of thematic and spatial resolution on maps of a coral reef ecosystem / M. Kendall in Marine geodesy, vol 31 n° 2 (June - September 2008)
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Titre : The influence of thematic and spatial resolution on maps of a coral reef ecosystem Type de document : Article/Communication Auteurs : M. Kendall, Auteur ; T. Miller, Auteur Année de publication : 2008 Article en page(s) : pp 75 - 102 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] cartographie écologique
[Termes IGN] détection de changement
[Termes IGN] échantillonnage d'image
[Termes IGN] écologie
[Termes IGN] écosystème
[Termes IGN] image spatiale
[Termes IGN] limite de résolution géométrique
[Termes IGN] récif corallien
[Termes IGN] relief sous-marinRésumé : (Auteur) Four maps of a reef ecosystem were created using two levels of both spatial and thematic resolution commonly used in science and management applications. Differences among maps were quantified using ecologically meaningful landscape indices. The objective was to inform research and management activities that are based on maps of reef ecosystems. Results indicate that inferences regarding the structure and organization of reef ecosystems are sensitive to changes in resolution of the maps characterizing them. Hard bottom, sand, and patchy features were the most sensitive to change in map resolution whereas continuous seagrass beds and linear reef features were not. Copyright Taylor & Francis Numéro de notice : A2008-495 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/01490410802053617 En ligne : https://doi.org/10.1080/01490410802053617 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29564
in Marine geodesy > vol 31 n° 2 (June - September 2008) . - pp 75 - 102[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 230-08021 RAB Revue Centre de documentation En réserve L003 Disponible Comparison of nine fusion techniques for very high resolution data / K.G. Nikolapoulos in Photogrammetric Engineering & Remote Sensing, PERS, vol 74 n° 5 (May 2008)
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Titre : Comparison of nine fusion techniques for very high resolution data Type de document : Article/Communication Auteurs : K.G. Nikolapoulos, Auteur Année de publication : 2008 Article en page(s) : pp 647 - 659 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse comparative
[Termes IGN] analyse en composantes principales
[Termes IGN] distorsion d'image
[Termes IGN] fusion d'images
[Termes IGN] image à résolution submétrique
[Termes IGN] image à très haute résolution
[Termes IGN] image multibande
[Termes IGN] image panchromatique
[Termes IGN] image Quickbird
[Termes IGN] pansharpening (fusion d'images)
[Termes IGN] qualité des données
[Termes IGN] transformation de Brovey
[Termes IGN] transformation en ondelettes
[Termes IGN] transformation intensité-teinte-saturationRésumé : (Auteur) The term “image fusion” covers multiple techniques used to combine the geometric detail of a high-resolution panchromatic image and the color information of a low-resolution multispectral image to produce a final image with the highest possible spatial information content while still preserving good spectral information quality. During the last twenty years, many methods such as Principal Component Analysis (PCA), Multiplicative Transform, Brovey Transform, and IHS Transform have been developed producing good quality fused images. Despite the quite good visual results, many research papers have reported the limitations of the above fusion techniques. The most significant problem is color distortion. Another common problem is that the fusion quality often depends upon the operator’s fusion experience and upon the data set being fused. In this study, we compare the efficiency of nine fusion techniques and more specifically the efficiency of IHS, Modified IHS, PCA, Pansharp, Wavelet, LMM (Local Mean Matching), LMVM (Local Mean and Variance Matching), Brovey, and Multiplicative fusion techniques for the fusion of QuickBird data. The suitability of these fusion techniques for various applications depends on the spectral and spatial quality of the fused images. In order to quantitatively measure the quality of the fused images, we have made the following controls. First, we have examined the visual qualitative result. Then, we examined the correlation between the original multispectral and the fused images and all the statistical parameters of the histograms of the various frequency bands. Finally, we performed an unsupervised classification, and we compared the resulting images. All the fusion techniques improve the resolution and the visual result. The resampling method practically has no effect on the final visual result. The LMVM, the LMM, the Pansharp, and the Wavelet merging technique do not change the statistical parameters of the original images. The Modified IHS provokes minor changes to the statistical parameters than the classical IHS or than the PCA. After all the controls, the LMVM, the LMM, the Pansharp, and the Modified IHS algorithm seem to gather the more advantages in fusion panchromatic and multispectral data. Copyright ASPRS Numéro de notice : A2008-178 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.74.5.647 En ligne : https://doi.org/10.14358/PERS.74.5.647 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29173
in Photogrammetric Engineering & Remote Sensing, PERS > vol 74 n° 5 (May 2008) . - pp 647 - 659[article]Shadow-Effect correction in aerial color imagery / H.G. Sohn in Photogrammetric Engineering & Remote Sensing, PERS, vol 74 n° 5 (May 2008)
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Titre : Shadow-Effect correction in aerial color imagery Type de document : Article/Communication Auteurs : H.G. Sohn, Auteur ; K.H. Yun, Auteur Année de publication : 2008 Article en page(s) : pp 611 - 618 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] correction des ombres
[Termes IGN] données multisources
[Termes IGN] image aérienne
[Termes IGN] image en couleur
[Termes IGN] image satellite
[Termes IGN] milieu urbain
[Termes IGN] segmentation d'imageRésumé : (Auteur) Due to the existence of shadows, especially in urban environments, it is difficult to extract semantic information from aerial and high-resolution satellite images. In this paper, an efficient method of correcting shadow effects using multisource data sets in aerial color images is proposed. The proposed method has three steps. First, it accurately detects the shadowed regions using the image geometry and the solar position of the image acquisition data. Then, the detected shadowed regions are segmented according to land surface type. Finally, the shadow effects of the segmented regions are corrected by directly comparing the same non shadow features with the segmented shadows. In the application part of this paper, the proposed techniques were applied in the extraction of an asphalt road from an image. Copyright ASPRS Numéro de notice : A2008-177 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.74.5.611 En ligne : https://doi.org/10.14358/PERS.74.5.611 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29172
in Photogrammetric Engineering & Remote Sensing, PERS > vol 74 n° 5 (May 2008) . - pp 611 - 618[article]Topographic data bases in the product generation of IRS-P6 Liss-4 imagery / M.V. Jyothi in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 3 (May - June 2008)
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Titre : Topographic data bases in the product generation of IRS-P6 Liss-4 imagery Type de document : Article/Communication Auteurs : M.V. Jyothi, Auteur ; P. Radhadevi, Auteur ; S.S. Solanki, Auteur Année de publication : 2008 Article en page(s) : pp 322 - 332 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] base de données topographiques
[Termes IGN] image à résolution subdecamétrique
[Termes IGN] image IRS-LISS
[Termes IGN] image multibande
[Termes IGN] image panchromatique
[Termes IGN] MNS GTOPO30
[Termes IGN] MNS SRTM
[Termes IGN] modèle numérique de surfaceRésumé : (Auteur) A continuous and autonomous co-registration and geo-location of image data from multiple sensors with widely varying view angles and resolution is one of the unique challenges of IRS-P6 data processing. The Liss-4 camera is capable of imaging in either multi-spectral or panchromatic modes with steerability up to +/- 27°. As the satellite sweeps longer strips with oblique viewing configuration, data product generation requires an elevation database to accommodate the errors due to terrain topography. SRTM, GTOPO30, DCW etc. are becoming hidden information to product generation schemes. In this paper, we analyze and justify the requirement of inclusion of a global DEM in the product generation system for Liss-4 data. In the first part of the study, after a brief introduction of sensor model, comparison of elevation from SRTM and GTOPO30 is made which leads towards a conclusion that GTOPO30 is adequate for improving the accuracy. The second part deals with the impact of GTOPO30 on geometric accuracy. Thirdly we analyze the terrain effects on band-to-band registration of Liss-4 multispectral data. A perfect band-to-band registration cannot be achieved without inclusion of digital elevation model. Many Liss-4 data sets with different tilts that cover terrain patches with flat, rolling and highly undulating nature are studied and the results reported. Copyright ISPRS Numéro de notice : A2008-214 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2007.10.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2007.10.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29209
in ISPRS Journal of photogrammetry and remote sensing > vol 63 n° 3 (May - June 2008) . - pp 322 - 332[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-08031 SL Revue Centre de documentation Revues en salle Disponible ASTER DEMs for geomatic and geoscientific applications: a review / Thierry Toutin in International Journal of Remote Sensing IJRS, vol 29 n° 7 (April 2008)
PermalinkEffects of spatial resolution ratio in image fusion / Y. Ling in International Journal of Remote Sensing IJRS, vol 29 n° 7 (April 2008)
PermalinkISRV: an improved synthetic variable ratio method for image fusion / L. Wang in Geocarto international, vol 23 n° 2 (April - May 2008)
PermalinkApplications of ICA for the enhancement and classification of polarimetric SAR images / H. Wang in International Journal of Remote Sensing IJRS, vol 29 n° 6 (March 2008)
PermalinkSpecies identification of individual trees by combining high resolution LiDAR data with multi-spectral images / Johan Holmgren in International Journal of Remote Sensing IJRS, vol 29 n° 5 (March 2008)
PermalinkLand-cover classification using ASTER: multi-band combinations based on wavelet fusion and SOM neural network / H. Bagan in Photogrammetric Engineering & Remote Sensing, PERS, vol 74 n° 3 (March 2008)
PermalinkModélisation de la végétation en milieu urbain : détection et caractérisation à partir d'images aériennes haute résolution couleur et infra-rouge / Corina Iovan in Revue Française de Photogrammétrie et de Télédétection, n° 189 (Mars 2008)
PermalinkUsing colour, texture, and hierarchical segmentation for high-resolution remote sensing / Roger Trias-Sanz in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 2 (March - April 2008)
PermalinkAn efficient approach to building superstructure reconstruction using digital elevation maps / Fadi Dornaika (2008)
PermalinkAutomatic registration of optical images, a stake for future missions: Application to ortho-rectification, time series and mosaic products / Simon Baillarin (2008)
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