Working Groups

WG III/1 - Terms of Reference:

• Promote within ISPRS more or less fully automatic methods for:
  • calibration and orientation without requiring markers,
  • surface reconstruction.
• Current state-of-the-art methods are to be tested with respect to general applicability, reliability, and performance. Thereby, a further refinement and robustification of the methods is to be fostered.
• WG III/1 will therefore provide various synthetic and real test data sets for image calibration/orientation as well as surface reconstruction tasks. It will invite researchers to evaluate their algorithms against known ground truth data with respect to general applicability and robustness.

WG III/2 - Terms of Reference:

• Information extraction from point clouds,
• Registration of point clouds,
• Classification/segmentation of natural and urban areas from point clouds,
• Analysis of full-waveform lidar data,
• Data management systems,
• Feature extraction and 3D modelling,
• Quality analysis of lidar data.

WG III/3 - Terms of Reference:

• Information mining in large satellite, aerial, and street view image archives;
• Satellite, aerial and street-view image indexing and retrieval;
• Machine learning and context aware image understanding;
• Image semantics and knowledge representation;
• Integration of heterogeneous features : textural, spectral and geometrical attributes;
• Integration of low and high level features (points, segments, regions, graphs, etc.);
• Integration of 3D information and spatial relations between the features;
• Multi-resolution image indexing;
• Image retrieval for localisation and pose estimation;
• Managing huge heterogeneous data sets.

WG III/4 - Terms of Reference:

• Models and techniques for extraction of buildings, roads, cars, vegetation, and other objects for the generation and update of high-resolution 3D city models and road databases from aerial, spaceborne and terrestrial image, laser, and (In)SAR data.
• Interpretation of the above sensor data possibly together with information from traditional cartographic products, CAD models, and urban GIS.
• Development of analysis tools and models required to integrate information about multiple object classes and their interconnections within complex scenes.
• Automatic and semi-automatic generation of urban models with level-of-detail (LOD) and inferred attribution including analysis of the trade-off between geometry and radiometry / texture for visualization
• Assessment of efficiency and quality of techniques for these objects and their dependence on the quality of the input data.

WG III/5 - Terms of Reference:

• camera and camera network calibration from image sequences including cameras with non-standard geometry and variable framerate,
• ego-motion determination for navigation and object reconstruction,
• detection, reconstruction, classification and tracking of single and multiple objects in image sequences,
• event reconstruction from image sequences as well as single and multiple video streams,
• qualitiy assessment of calibration, orientation and object detection using image sequences.

ICWG III/VII - Terms of Reference:

• Statistical and non-statistical methods,
• Pixel-based and object-based methods,
• Graphical models (random fields, Bayesian nets) and stochastic grammars,
• Scale space methods,
• Data fusion,
• Quality and uncertainty,
• Benchmarking.