The Experts below are selected from a list of 153 Experts worldwide ranked by ideXlab platform

Francesca Pieralice - One of the best experts on this subject based on the ideXlab platform.

  • evaluation and comparison of different radargrammetric approaches for digital surface models generation from cosmo skymed terrasar x radarsat 2 imagery analysis of beauport canada test site
    Isprs Journal of Photogrammetry and Remote Sensing, 2015
    Co-Authors: Paola Capaldo, Francesca Fratarcangeli, Francesca Pieralice, Andrea Nascetti, M Porfiri, M Crespi, Thierry Toutin
    Abstract:

    Abstract In this manuscript we analyze the potentialities of the radargrammetric DSMs generation using high resolution SAR imagery acquired by three different platforms (COSMO-SkyMed, TerraSAR-X and RADARSAT-2), with particular attention to geometric orientation models. Two orientation models are considered and compared: Toutin’s model (Canada Center for Remote Sensing), implemented in the commercial software package PCI-Geomatica and based on Ground Control Points (GCPs), and the radargrammetric model implemented in the scientific software SISAR (University of Rome La Sapienza), based on images metadata orbital information only. Moreover, a comparison between the DSMs following the image matching approaches implemented in PCI-Geomatica and SISAR has been performed. The analysis has been carried out over Beauport test site (Quebec, Canada), where three overlapping stereopairs, one for each of the mentioned platform, were acquired and a LiDAR ground truth and a dense set of GNSS Check points (CPs) are available. The presented results appear promising: DSMs accuracy are within 4 and 5 m for all sensors, independently from orientation model (with or without GCP) and image matching approach, provided good relative orientation is guaranteed, what mainly attains to the quality of metadata orbital information.

  • dsm generation from high resolution imagery applications with worldview 1 and geoeye 1
    European Journal of Remote Sensing, 2012
    Co-Authors: Paola Capaldo, Mattia Crespi, Francesca Fratarcangeli, Andrea Nascetti, Francesca Pieralice
    Abstract:

    In this paper we present and discuss some results obtained with a new proprietary matching strategy for DSMs generation, which is implemented in the SISAR software developed at the Area di Geodesia e Geomatica – Universita di Roma “La Sapienza”. In order to assess the accuracy of the new strategy, some tests were carried out, using a stereo pair of Augusta coastal zone (Sicily, South Italy) acquired from WorldView-1 and one of the first available GeoEye-1 stereo pairs, which was acquired over Rome. The results show that an accuracy at the level of about 2 m is achievable in open areas with both WorldWiew-1 and GeoEye-1 stereo pairs, whereas higher errors are displayed in urban areas. For WorldWiew-1 the results are still acceptable, being the accuracy at the level of 3 meters, but for GeoEye-1 the DSM extracted over a very dense urban area are much worse, with an accuracy at the level of 8-10 meters. Nonetheless, the new matching strategy has been proven effective, performing always better if compared with the one implemented in a well known and largely used software as PCI-Geomatics.

  • orientation of cartosat 1 stereo imagery
    2008
    Co-Authors: Mattia Crespi, Francesca Fratarcangeli, Francesca Giannone, Karsten Jacobsen, Francesca Pieralice
    Abstract:

    The Department of Space (DOS), Government of India has launched a series of satellites for Earth’s resource management and monitoring. These satellites have been very successful in providing data in various map scales. An increasing demand for large scale and topographic maps exists so that new satellites, like Cartosat-1, which is dedicated to stereo viewing for large scale mapping and terrain modelling applications, has been launched. This stereo capability fills the limited capacity of very high resolution satellites for three-dimensional point determination and enables the generation of detailed digital elevation models (DEMs) not having gaps in mountainous regions. The Cartosat-1 sensor offers a resolution of 2.5m GSD in panchromatic mode. One CCD-line sensor camera is looking with a nadir angle of 26° in forward direction, the other -5° aft along the track. The images are taken only with few seconds difference in time, avoiding the known problems of automatic matching of scenes taken at different days. The Institute “Area di Geodesia e Geomatica” - Sapienza Universita di Roma (with Eurimage S.p.A. and CyberCity AG) and the Institute of Photogrammetry and Geoinformation, Leibniz University Hannover participated at the ISPRS-ISRO Cartosat-1 Scientific Assessment Programme (C-SAP), in order to investigate the generation of Digital Surface Models (DSMs) from Cartosat-1 stereo scenes. In the present joint research the first version of Cartosat rigorous model implemented in the scientific software (SISAR-Software per Immagini Satellitari ad Alta Risoluzione) developed at the “Area di Geodesia e Geomatica” - Sapienza Universita di Roma, is described.

Francesca Fratarcangeli - One of the best experts on this subject based on the ideXlab platform.

  • evaluation and comparison of different radargrammetric approaches for digital surface models generation from cosmo skymed terrasar x radarsat 2 imagery analysis of beauport canada test site
    Isprs Journal of Photogrammetry and Remote Sensing, 2015
    Co-Authors: Paola Capaldo, Francesca Fratarcangeli, Francesca Pieralice, Andrea Nascetti, M Porfiri, M Crespi, Thierry Toutin
    Abstract:

    Abstract In this manuscript we analyze the potentialities of the radargrammetric DSMs generation using high resolution SAR imagery acquired by three different platforms (COSMO-SkyMed, TerraSAR-X and RADARSAT-2), with particular attention to geometric orientation models. Two orientation models are considered and compared: Toutin’s model (Canada Center for Remote Sensing), implemented in the commercial software package PCI-Geomatica and based on Ground Control Points (GCPs), and the radargrammetric model implemented in the scientific software SISAR (University of Rome La Sapienza), based on images metadata orbital information only. Moreover, a comparison between the DSMs following the image matching approaches implemented in PCI-Geomatica and SISAR has been performed. The analysis has been carried out over Beauport test site (Quebec, Canada), where three overlapping stereopairs, one for each of the mentioned platform, were acquired and a LiDAR ground truth and a dense set of GNSS Check points (CPs) are available. The presented results appear promising: DSMs accuracy are within 4 and 5 m for all sensors, independently from orientation model (with or without GCP) and image matching approach, provided good relative orientation is guaranteed, what mainly attains to the quality of metadata orbital information.

  • dsm generation from high resolution imagery applications with worldview 1 and geoeye 1
    European Journal of Remote Sensing, 2012
    Co-Authors: Paola Capaldo, Mattia Crespi, Francesca Fratarcangeli, Andrea Nascetti, Francesca Pieralice
    Abstract:

    In this paper we present and discuss some results obtained with a new proprietary matching strategy for DSMs generation, which is implemented in the SISAR software developed at the Area di Geodesia e Geomatica – Universita di Roma “La Sapienza”. In order to assess the accuracy of the new strategy, some tests were carried out, using a stereo pair of Augusta coastal zone (Sicily, South Italy) acquired from WorldView-1 and one of the first available GeoEye-1 stereo pairs, which was acquired over Rome. The results show that an accuracy at the level of about 2 m is achievable in open areas with both WorldWiew-1 and GeoEye-1 stereo pairs, whereas higher errors are displayed in urban areas. For WorldWiew-1 the results are still acceptable, being the accuracy at the level of 3 meters, but for GeoEye-1 the DSM extracted over a very dense urban area are much worse, with an accuracy at the level of 8-10 meters. Nonetheless, the new matching strategy has been proven effective, performing always better if compared with the one implemented in a well known and largely used software as PCI-Geomatics.

  • orientation of cartosat 1 stereo imagery
    2008
    Co-Authors: Mattia Crespi, Francesca Fratarcangeli, Francesca Giannone, Karsten Jacobsen, Francesca Pieralice
    Abstract:

    The Department of Space (DOS), Government of India has launched a series of satellites for Earth’s resource management and monitoring. These satellites have been very successful in providing data in various map scales. An increasing demand for large scale and topographic maps exists so that new satellites, like Cartosat-1, which is dedicated to stereo viewing for large scale mapping and terrain modelling applications, has been launched. This stereo capability fills the limited capacity of very high resolution satellites for three-dimensional point determination and enables the generation of detailed digital elevation models (DEMs) not having gaps in mountainous regions. The Cartosat-1 sensor offers a resolution of 2.5m GSD in panchromatic mode. One CCD-line sensor camera is looking with a nadir angle of 26° in forward direction, the other -5° aft along the track. The images are taken only with few seconds difference in time, avoiding the known problems of automatic matching of scenes taken at different days. The Institute “Area di Geodesia e Geomatica” - Sapienza Universita di Roma (with Eurimage S.p.A. and CyberCity AG) and the Institute of Photogrammetry and Geoinformation, Leibniz University Hannover participated at the ISPRS-ISRO Cartosat-1 Scientific Assessment Programme (C-SAP), in order to investigate the generation of Digital Surface Models (DSMs) from Cartosat-1 stereo scenes. In the present joint research the first version of Cartosat rigorous model implemented in the scientific software (SISAR-Software per Immagini Satellitari ad Alta Risoluzione) developed at the “Area di Geodesia e Geomatica” - Sapienza Universita di Roma, is described.

Paola Capaldo - One of the best experts on this subject based on the ideXlab platform.

  • evaluation and comparison of different radargrammetric approaches for digital surface models generation from cosmo skymed terrasar x radarsat 2 imagery analysis of beauport canada test site
    Isprs Journal of Photogrammetry and Remote Sensing, 2015
    Co-Authors: Paola Capaldo, Francesca Fratarcangeli, Francesca Pieralice, Andrea Nascetti, M Porfiri, M Crespi, Thierry Toutin
    Abstract:

    Abstract In this manuscript we analyze the potentialities of the radargrammetric DSMs generation using high resolution SAR imagery acquired by three different platforms (COSMO-SkyMed, TerraSAR-X and RADARSAT-2), with particular attention to geometric orientation models. Two orientation models are considered and compared: Toutin’s model (Canada Center for Remote Sensing), implemented in the commercial software package PCI-Geomatica and based on Ground Control Points (GCPs), and the radargrammetric model implemented in the scientific software SISAR (University of Rome La Sapienza), based on images metadata orbital information only. Moreover, a comparison between the DSMs following the image matching approaches implemented in PCI-Geomatica and SISAR has been performed. The analysis has been carried out over Beauport test site (Quebec, Canada), where three overlapping stereopairs, one for each of the mentioned platform, were acquired and a LiDAR ground truth and a dense set of GNSS Check points (CPs) are available. The presented results appear promising: DSMs accuracy are within 4 and 5 m for all sensors, independently from orientation model (with or without GCP) and image matching approach, provided good relative orientation is guaranteed, what mainly attains to the quality of metadata orbital information.

  • dsm generation from high resolution imagery applications with worldview 1 and geoeye 1
    European Journal of Remote Sensing, 2012
    Co-Authors: Paola Capaldo, Mattia Crespi, Francesca Fratarcangeli, Andrea Nascetti, Francesca Pieralice
    Abstract:

    In this paper we present and discuss some results obtained with a new proprietary matching strategy for DSMs generation, which is implemented in the SISAR software developed at the Area di Geodesia e Geomatica – Universita di Roma “La Sapienza”. In order to assess the accuracy of the new strategy, some tests were carried out, using a stereo pair of Augusta coastal zone (Sicily, South Italy) acquired from WorldView-1 and one of the first available GeoEye-1 stereo pairs, which was acquired over Rome. The results show that an accuracy at the level of about 2 m is achievable in open areas with both WorldWiew-1 and GeoEye-1 stereo pairs, whereas higher errors are displayed in urban areas. For WorldWiew-1 the results are still acceptable, being the accuracy at the level of 3 meters, but for GeoEye-1 the DSM extracted over a very dense urban area are much worse, with an accuracy at the level of 8-10 meters. Nonetheless, the new matching strategy has been proven effective, performing always better if compared with the one implemented in a well known and largely used software as PCI-Geomatics.

Mattia Crespi - One of the best experts on this subject based on the ideXlab platform.

  • dsm generation from high resolution imagery applications with worldview 1 and geoeye 1
    European Journal of Remote Sensing, 2012
    Co-Authors: Paola Capaldo, Mattia Crespi, Francesca Fratarcangeli, Andrea Nascetti, Francesca Pieralice
    Abstract:

    In this paper we present and discuss some results obtained with a new proprietary matching strategy for DSMs generation, which is implemented in the SISAR software developed at the Area di Geodesia e Geomatica – Universita di Roma “La Sapienza”. In order to assess the accuracy of the new strategy, some tests were carried out, using a stereo pair of Augusta coastal zone (Sicily, South Italy) acquired from WorldView-1 and one of the first available GeoEye-1 stereo pairs, which was acquired over Rome. The results show that an accuracy at the level of about 2 m is achievable in open areas with both WorldWiew-1 and GeoEye-1 stereo pairs, whereas higher errors are displayed in urban areas. For WorldWiew-1 the results are still acceptable, being the accuracy at the level of 3 meters, but for GeoEye-1 the DSM extracted over a very dense urban area are much worse, with an accuracy at the level of 8-10 meters. Nonetheless, the new matching strategy has been proven effective, performing always better if compared with the one implemented in a well known and largely used software as PCI-Geomatics.

  • orientation of cartosat 1 stereo imagery
    2008
    Co-Authors: Mattia Crespi, Francesca Fratarcangeli, Francesca Giannone, Karsten Jacobsen, Francesca Pieralice
    Abstract:

    The Department of Space (DOS), Government of India has launched a series of satellites for Earth’s resource management and monitoring. These satellites have been very successful in providing data in various map scales. An increasing demand for large scale and topographic maps exists so that new satellites, like Cartosat-1, which is dedicated to stereo viewing for large scale mapping and terrain modelling applications, has been launched. This stereo capability fills the limited capacity of very high resolution satellites for three-dimensional point determination and enables the generation of detailed digital elevation models (DEMs) not having gaps in mountainous regions. The Cartosat-1 sensor offers a resolution of 2.5m GSD in panchromatic mode. One CCD-line sensor camera is looking with a nadir angle of 26° in forward direction, the other -5° aft along the track. The images are taken only with few seconds difference in time, avoiding the known problems of automatic matching of scenes taken at different days. The Institute “Area di Geodesia e Geomatica” - Sapienza Universita di Roma (with Eurimage S.p.A. and CyberCity AG) and the Institute of Photogrammetry and Geoinformation, Leibniz University Hannover participated at the ISPRS-ISRO Cartosat-1 Scientific Assessment Programme (C-SAP), in order to investigate the generation of Digital Surface Models (DSMs) from Cartosat-1 stereo scenes. In the present joint research the first version of Cartosat rigorous model implemented in the scientific software (SISAR-Software per Immagini Satellitari ad Alta Risoluzione) developed at the “Area di Geodesia e Geomatica” - Sapienza Universita di Roma, is described.

  • orientation orthorectification terrain and city modeling from cartosat 1 stereo imagery preliminary results in the first phase of isprs isro c sap
    Journal of Applied Remote Sensing, 2008
    Co-Authors: Mattia Crespi, Francesco Barbato, Laura De Vendictis, Fabio Volpe, Roberta Onori, Daniela Poli, Xinhua Wang
    Abstract:

    CARTOSAT-1, launched in May 2005, is basically a stereo mission, as it is equipped with two cameras onboard, namely Aft and Fore, tilted along track by -5° and +26° respectively, allowing the acquisition of stereo data with a resolution of 2.5 m. The Institute "Area di Geodesia e Geomatica" at Sapienza Universita di Roma, Eurimage S.p.A. and the former CyberCity AG participated at the ISPRS-ISRO Cartosat-1 Scientific Assessment Programme (C-SAP), in order to investigate the generation of Digital Surface Models (DSMs) from Cartosat-1 stereo scenes. The paper describes the work carried out during the summer of 2006, on the stereopair belonging to the test field called TS-8, acquired on 8th June 2005 over the city of Rome, Italy. The processing included the sensor orientation, Digital Surface Model (DSM) generation, orthoimage production and 3D features extraction. For the evaluation of the DSM, orthophoto and 3D feature accuracy, a large scale 3D map (1:2'000) was used.

  • radiometric quality and dsm generation analysis of cartosat 1 stereo imagery
    The International Archives of the Photogrammetry Remote Sensing and Spatial Information Sciences, 2008
    Co-Authors: Mattia Crespi, Laura De Vendictis, Daniela Poli, K Wolff, G Colosimo, Armin Gruen, F Volp
    Abstract:

    CARTOSAT-1, launched in May 2005, is equipped with two cameras, Aft and Fore, tilted along-track by -5° and +26° respectively, allowing the acquisition of stereo data with a geometrical resolution of 2.5 m. The Institute “Area di Geodesia e Geomatica” at Sapienza Universita di Roma, Eurimage S.p.A. and the Institute of Geodesy and Photogrammetry, ETH Zurich participated in the ISPRS-ISRO Cartosat-1 Scientific Assessment Programme (C-SAP), in order to investigate the generation of Digital Surface Models (DSMs) from Cartosat-1 stereo scenes. This paper follows up on the previous work done by the Institutes and shows the analysis of a new standard stereopair belonging to the additional test field TS-Castelgandolfo, acquired on 18th July 2006 over the area of Castelgandolfo, Rome, Italy (30 x 30 km). The images are processed, in order to test both the image quality and the potential for DSM generation, following the procedures already established. The results obtained in all steps of the investigation, particularly those related to image quality, the orientation with different models and software and the effectiveness of image filtering for enhancing the DSM generation are presented and discussed.

Andrea Nascetti - One of the best experts on this subject based on the ideXlab platform.

  • evaluation and comparison of different radargrammetric approaches for digital surface models generation from cosmo skymed terrasar x radarsat 2 imagery analysis of beauport canada test site
    Isprs Journal of Photogrammetry and Remote Sensing, 2015
    Co-Authors: Paola Capaldo, Francesca Fratarcangeli, Francesca Pieralice, Andrea Nascetti, M Porfiri, M Crespi, Thierry Toutin
    Abstract:

    Abstract In this manuscript we analyze the potentialities of the radargrammetric DSMs generation using high resolution SAR imagery acquired by three different platforms (COSMO-SkyMed, TerraSAR-X and RADARSAT-2), with particular attention to geometric orientation models. Two orientation models are considered and compared: Toutin’s model (Canada Center for Remote Sensing), implemented in the commercial software package PCI-Geomatica and based on Ground Control Points (GCPs), and the radargrammetric model implemented in the scientific software SISAR (University of Rome La Sapienza), based on images metadata orbital information only. Moreover, a comparison between the DSMs following the image matching approaches implemented in PCI-Geomatica and SISAR has been performed. The analysis has been carried out over Beauport test site (Quebec, Canada), where three overlapping stereopairs, one for each of the mentioned platform, were acquired and a LiDAR ground truth and a dense set of GNSS Check points (CPs) are available. The presented results appear promising: DSMs accuracy are within 4 and 5 m for all sensors, independently from orientation model (with or without GCP) and image matching approach, provided good relative orientation is guaranteed, what mainly attains to the quality of metadata orbital information.

  • dsm generation from high resolution imagery applications with worldview 1 and geoeye 1
    European Journal of Remote Sensing, 2012
    Co-Authors: Paola Capaldo, Mattia Crespi, Francesca Fratarcangeli, Andrea Nascetti, Francesca Pieralice
    Abstract:

    In this paper we present and discuss some results obtained with a new proprietary matching strategy for DSMs generation, which is implemented in the SISAR software developed at the Area di Geodesia e Geomatica – Universita di Roma “La Sapienza”. In order to assess the accuracy of the new strategy, some tests were carried out, using a stereo pair of Augusta coastal zone (Sicily, South Italy) acquired from WorldView-1 and one of the first available GeoEye-1 stereo pairs, which was acquired over Rome. The results show that an accuracy at the level of about 2 m is achievable in open areas with both WorldWiew-1 and GeoEye-1 stereo pairs, whereas higher errors are displayed in urban areas. For WorldWiew-1 the results are still acceptable, being the accuracy at the level of 3 meters, but for GeoEye-1 the DSM extracted over a very dense urban area are much worse, with an accuracy at the level of 8-10 meters. Nonetheless, the new matching strategy has been proven effective, performing always better if compared with the one implemented in a well known and largely used software as PCI-Geomatics.