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You searched for: Journal ISPRS journal of photogrammetry and remote sensing Remove constraint Journal: ISPRS journal of photogrammetry and remote sensing Publication Year 2012 Remove constraint Publication Year: 2012 Source 2012 v.74 Remove constraint Source: 2012 v.74
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1. A simple method to recover the latency time of tactical grade IMU systems

Author:
Seube, Nicolas; Picard, Alan; Rondeau, Mathieu
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 85-89
ISSN:
0924-2716
Subject:
computer software; global positioning systems; lidar; surveys
Abstract:
... This paper investigates the problem of latency estimation between an IMU (Inertial Measurement Unit) and a LiDAR (Light Detection And Ranging). The latency is due to the IMU itself, but also to the acquisition software and hardware configuration, which is generally set-up by survey systems users. We propose a method for latency estimation, and we show that this method meets the accuracy requiremen ...
DOI:
10.1016/j.isprsjprs.2012.09.001

2. Assessment of hyperspectral MIVIS sensor capability for heterogeneous landscape classification

Author:
Forzieri, Giovanni; Moser, Gabriele; Catani, Filippo
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 175-184
ISSN:
0924-2716
Subject:
algorithms; autumn; cropland; data collection; equipment; floodplains; image analysis; land cover; landscapes; mixed forests; remote sensing; rivers; rural areas; Italy
Abstract:
... The potential and limitations of the hyperspectral remote sensing MIVIS sensor (Multispectral Infrared Visible Imaging Spectrometer) in classifying heterogeneous landscapes are explored in this study. In order to quantify the discriminant information derived from selected MIVIS subsets we classified a monitored scenario by progressively increasing the feature space dimensionality. The hyperspectra ...
DOI:
10.1016/j.isprsjprs.2012.09.011

3. A symmetry detector for map generalization and urban-space analysis

Author:
Haunert, Jan-Henrik
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 66-77
ISSN:
0924-2716
Subject:
algorithms; data collection; least squares; vector data
Abstract:
... This article presents an algorithmic approach to the problem of finding symmetries in building footprints, which is motivated by map generalization tasks such as symmetry-preserving building simplification and symmetry-aware grouping and aggregation. Moreover, symmetries in building footprints may be used for landmark selection and building classification. The presented method builds up on existin ...
DOI:
10.1016/j.isprsjprs.2012.08.004

4. Automated planimetric quality control in high accuracy airborne laser scanning surveys

Author:
Vosselman, George
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 90-100
ISSN:
0924-2716
Subject:
models; quality control; selection criteria; surveys; tiles
Abstract:
... With the increasing point densities of airborne laser scanning surveys, the applications of the generated point clouds have evolved from the production of digital terrain models to 3D modelling of a wide variety of objects. Likewise in quality control procedures criteria for height accuracy are extended with measures to describe the planimetric accuracy. This paper introduces a measure for the pot ...
DOI:
10.1016/j.isprsjprs.2012.09.002

5. Combined rigorous-generic direct orthorectification procedure for IRS-p6 sensors

Author:
Yousefzadeh, Meisam; Mojaradi, Barat
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 122-132
ISSN:
0924-2716
Subject:
Advanced Spaceborne Thermal Emission and Reflection Radiometer; algorithms; data collection; digital elevation models; georeferencing; orthophotography; remote sensing
Abstract:
... The accessibility of global data, such as the digital elevation model (DEM), and the development of global visualisations allow promising new methods for minimising the distortion in the online generation of rough orthorectified products to be developed. Direct georeferencing (DG) has attracted a considerable amount of attention in the applications of pushbroom raw images in orthorectification or ...
DOI:
10.1016/j.isprsjprs.2012.09.005

6. Constructing satellite-derived hyperspectral indices sensitive to canopy structure variables of a Cordilleran Cypress (Austrocedrus chilensis) forest

Author:
Peña, Marco A.; Brenning, Alexander; Sagredo, Ariel
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 1-10
ISSN:
0924-2716
Subject:
Libocedrus chilensis; canopy; environmental factors; forests; indigenous species; leaves; normalized difference vegetation index; reflectance; tree and stand measurements; trees; Andes region; Chile
Abstract:
... Satellite hyperspectral data were used to construct empirical spectral indices related to the canopy structure of a Cordilleran Cypress (Austrocedrus chilensis) forest located in the Andes of central Chile. Measurements of tree diameter at breast height (DBH) and tree height (TH) were performed for a set of plots located within a pure and unevenly aged stand of A. chilensis with moderate cover. No ...
DOI:
10.1016/j.isprsjprs.2012.06.010

7. Conventional and fuzzy comparisons of large scale land cover products: Application to CORINE, GLC2000, MODIS and GlobCover in Europe

Author:
Pérez-Hoyos, A.; García-Haro, F.J.; San-Miguel-Ayanz, J.
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 185-201
ISSN:
0924-2716
Subject:
data collection; land cover; moderate resolution imaging spectroradiometer; monitoring; uncertainty; Europe
Abstract:
... One of the major drawbacks of land cover products is the lack of interoperability among them. Since their development was driven by different national or international initiatives, they were developed for different purposes and hold diverse technical characteristics. Thus, comparison among products and quality monitoring is necessary in assessing their usefulness. This paper provides a methodology ...
DOI:
10.1016/j.isprsjprs.2012.09.006

8. Estimating the fundamental matrix under pure translation and radial distortion

Author:
Steger, Carsten
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 202-217
ISSN:
0924-2716
Subject:
algorithms; industrial applications; models
Abstract:
... Four algorithms for estimating the fundamental matrix and radial distortion for the case that the images are related by a pure camera translation are proposed. This restricted class of motions is important in robotics and industrial applications. It is assumed that the radial distortions can be modeled by the division model. First, a linear 3-point minimal solver is derived, which is essential to ...
DOI:
10.1016/j.isprsjprs.2012.09.012

9. Estimation of vertical plant area density profiles in a rice canopy at different growth stages by high-resolution portable scanning lidar with a lightweight mirror

Author:
Hosoi, Fumiki; Omasa, Kenji
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 11-19
ISSN:
0924-2716
Subject:
Oryza sativa; canopy; developmental stages; leaves; lidar; rice; stems
Abstract:
... We used a high-resolution portable scanning lidar together with a lightweight mirror and a voxel-based canopy profiling method to estimate the vertical plant area density (PAD) profile of a rice (Oryza sativa L. cv. Koshihikari) canopy at different growth stages. To improve the laser’s penetration of the dense canopy, we used a mirror to change the direction of the laser beam from horizontal to ve ...
DOI:
10.1016/j.isprsjprs.2012.08.001

10. Forest variable estimation using a high-resolution digital surface model

Author:
Järnstedt, J.; Pekkarinen, A.; Tuominen, S.; Ginzler, C.; Holopainen, M.; Viitala, R.
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 78-84
ISSN:
0924-2716
Subject:
canopy; models; aerial photography; photogrammetry; forest inventory; remote sensing; stand basal area; forests
Abstract:
... Airborne laser scanning is today considered the most accurate remote sensing method for forest inventory. The main advantage of laser scanning is the three-dimensional data. Three-dimensional canopy surface models can also be derived by means of digital aerial photogrammetry on the basis of optical remote sensing imagery. The photogrammetric surface models require high-resolution aerial images wit ...
DOI:
10.1016/j.isprsjprs.2012.08.006

11. Hyperspectral shape-based unmixing to improve intra- and interclass variability for forest and agro-ecosystem monitoring

Author:
Tits, Laurent; De Keersmaecker, Wanda; Somers, Ben; Asner, Gregory P.; Farifteh, Jamshid; Coppin, Pol
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 163-174
ISSN:
0924-2716
Subject:
agroecosystems; data collection; forests; models; monitoring; temporal variation; value added; vegetation cover
Abstract:
... The monitoring of forests and agro-ecosystems often requires the use of a spectral mixture model to provide detailed information on spatial and temporal variations in vegetation cover. Two key issues in the mapping of vegetation cover in complex ecosystems are the high spectral similarity (i.e. low interclass variability) between and the high spectral variability among different vegetation species ...
DOI:
10.1016/j.isprsjprs.2012.09.013

12. LiDAR-Landsat data fusion for large-area assessment of urban land cover: Balancing spatial resolution, data volume and mapping accuracy

Author:
Singh, Kunwar K.; Vogler, John B.; Shoemaker, Douglas A.; Meentemeyer, Ross K.
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 110-121
ISSN:
0924-2716
Subject:
Landsat; agricultural land; canopy; forests; land cover; lidar; models; thematic maps; urban areas; North Carolina
Abstract:
... The structural characteristics of Light Detection and Ranging (LiDAR) data are increasingly used to classify urban environments at fine scales, but have been underutilized for distinguishing heterogeneous land covers over large urban regions due to high cost, limited spectral information, and the computational difficulties posed by inherently large data volumes. Here we explore tradeoffs between p ...
DOI:
10.1016/j.isprsjprs.2012.09.009

13. Mapping evergreen forests in the Brazilian Amazon using MODIS and PALSAR 500-m mosaic imagery

Author:
Sheldon, Sage; Xiao, Xiangming; Biradar, Chandrashekhar
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 34-40
ISSN:
0924-2716
Subject:
algorithms; forests; moderate resolution imaging spectroradiometer; time series analysis; Amazonia
Abstract:
... In this study, we evaluate a methodology that uses dual-polarization L-band SAR 500-m mosaic PALSAR imagery to identify and map forests in the Brazilian Amazon and an algorithm that uses time-series MODIS imagery to map evergreen forest. IKONOS images were used to evaluate forest maps derived from PALSAR and MODIS imagery. A comparison between the PALSAR forest map and IKONOS forest maps shows tha ...
DOI:
10.1016/j.isprsjprs.2012.07.003

14. Mapping tropical forests and rubber plantations in complex landscapes by integrating PALSAR and MODIS imagery

Author:
Dong, Jinwei; Xiao, Xiangming; Sheldon, Sage; Biradar, Chandrashekhar; Xie, Guishui
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 20-33
ISSN:
0924-2716
Subject:
carbon cycle; cloud cover; cropland; data collection; deciduous forests; deforestation; emissions; forest management; land cover; landscapes; moderate resolution imaging spectroradiometer; neural networks; plantations; rubber; surface water; synthetic aperture radar; tropical forests; tropics; China; Japan
Abstract:
... Knowledge of the spatial distribution of forest types in tropical regions is important for implementation of Reducing Emissions from Deforestation and Forest Degradation (REDD), better understanding of the global carbon cycle, and optimal forest management. Frequent cloud cover in moist tropical regions poses challenges for using optical images to map and monitor forests. Recently, Japan Aerospace ...
DOI:
10.1016/j.isprsjprs.2012.07.004

15. Matching of straight line segments from aerial stereo images of urban areas

Author:
Ok, Ali Ozgun; Wegner, Jan Dirk; Heipke, Christian; Rottensteiner, Franz; Soergel, Uwe; Toprak, Vedat
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 133-152
ISSN:
0924-2716
Subject:
aerial photography; probability; urban areas
Abstract:
... Reliable extraction of corresponding straight lines in overlapping images can be used for different purposes such as 3D object extraction, image registration, automated triangulation, etc. In this study, a new approach for the matching of straight line features from stereo aerial images is presented. Initial correspondences between stereo images are generated using a pair-wise stereo matching appr ...
DOI:
10.1016/j.isprsjprs.2012.09.003

16. Quantification of crown changes and change uncertainty of trees in an urban environment

Author:
Ardila, Juan P.; Bijker, Wietske; Tolpekin, Valentyn A.; Stein, Alfred
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 41-55
ISSN:
0924-2716
Subject:
aerial photography; cities; residential areas; spatial data; tree crown; trees; uncertainty; urban areas; urban forestry; Netherlands
Abstract:
... Local authorities require a detailed report of the state of green resources in cities to quantify the benefits of urban trees and determine urban forestry interventions. This study uses bitemporal remote sensing data to monitor changes of urban trees over time. It presents a fuzzy approach to recognize the fuzziness of tree crowns from high resolution images in urban areas. The method identifies t ...
DOI:
10.1016/j.isprsjprs.2012.08.007

17. Range camera self-calibration with scattering compensation

Author:
Lichti, Derek D.; Qi, Xiaojuan; Ahmed, Tanvir
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 101-109
ISSN:
0924-2716
Subject:
cameras; data collection; models
Abstract:
... Time-of-flight range camera data are prone to the scattering bias caused by multiple internal reflections of light received from a highly reflective object in the camera’s foreground that induce a phase shift in the light received from background targets. The corresponding range bias can have serious implications on the quality of data of captured scenes as well as the geometric self-calibration o ...
DOI:
10.1016/j.isprsjprs.2012.09.008

18. Temporal characteristics of thermal satellite images for urban heat stress and heat island mapping

Author:
Nichol, Janet E.; To, Pui Hang
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 153-162
ISSN:
0924-2716
Subject:
Advanced Spaceborne Thermal Emission and Reflection Radiometer; air temperature; cities; climatic factors; heat island; heat stress; monitoring; remote sensing; summer; thermal properties; towns; urban planning; wind speed; China
Abstract:
... The reconstruction of urban climate is still challenging to climatologists in spite of over five decades of research including direct data measurement and model building. Methods for measuring and monitoring urban climate have strengths and weaknesses depending on the application. The mapping of patterns of urban heat stress over a city is not useful if the patterns depicted apply only to the time ...
DOI:
10.1016/j.isprsjprs.2012.09.007

19. The spectral response of Buxus sempervirens to different types of environmental stress – A laboratory experiment

Author:
de Jong, Steven M.; Addink, Elisabeth A.; Hoogenboom, Priscilla; Nijland, Wiebe
Source:
ISPRS journal of photogrammetry and remote sensing 2012 v.74 pp. 56-65
ISSN:
0924-2716
Subject:
Buxus sempervirens; absorption; branches; canopy; chlorine; drought; heat; image analysis; leaf area index; leaves; plant stress; poisoning; reflectance; spectroscopy; summer; temperature; vegetation; wavelengths; winter; France
Abstract:
... The European Mediterranean regions are expected to encounter drier summer conditions and warmer temperatures for the winter of +2°C and of +5°C for the summer in the next six decennia. As a result the natural vegetation will face harsher conditions due to lower water availability, longer summer droughts and higher temperatures resulting in plant stress conditions. To monitor vegetation conditions ...
DOI:
10.1016/j.isprsjprs.2012.08.005