Results 211 to 220 of about 267,276 (259)

Building extraction from LIDAR data

IEEE/ISPRS Joint Workshop on Remote Sensing and Data Fusion over Urban Areas (Cat. No.01EX482), 2002
A strategy for building reconstruction relying on LIDAR data only is presented. Roofs are modeled as plane surfaces, connected along ridges and bordered by the eaves lines. Edge pixels and plane surfaces are detected and labelled as roof slopes based on gradient orientation and plane fitting by RANSAC; a similar procedure applies to eaves lines.
NARDINOCCHI C.   +2 more
openaire   +3 more sources

Building extraction with morphology

2009 4th International Conference on Recent Advances in Space Technologies, 2009
Building extraction is one of the biggest problems of the photogrammetry. Automatic building extraction from aerial imagery in an urban environment is the main focus of this study. The strategy of our approach is to reduce the complexity of the image with the mathematical morphology. True color aerial images have been used as the information source.
Bayram, Buelent, ACAR, Uğur
openaire   +3 more sources

Template-Based Hierarchical Building Extraction

IEEE Geoscience and Remote Sensing Letters, 2014
Automatic building extraction is an important field of research in remote sensing. This letter introduces a new object-based building extraction approach. So far, many object-based algorithms for building extraction have been proposed. However, these algorithms mainly operate in two phases: object construction and building extraction.
Sellaouti, A.   +3 more
openaire   +1 more source

A grammatical framework for building rooftop extraction

2009 IEEE International Geoscience and Remote Sensing Symposium, 2009
Roof detection has been studied for several decades, one of the big challenge is its structure and appearance diversity. In this paper, we present a grammatical framework to account for these diversities and a multiple way compositional algorithm to extract rooftops from aerial images.
Qiongchen Wang, Zhiguo Jiang 0001
openaire   +2 more sources

Use of shadows for extracting buildings in aerial images

Computer Vision, Graphics, and Image Processing, 1989
Summary: Two new methods integrating region growing and edge detection are presented to extract buildings in aerial images. In the domain we are considering, building shadows play an important role in enhancing the detection accuracy and reliability.
Yuh-Tay Liow, Theodosios Pavlidis
openaire   +2 more sources

Polygonal Building Extraction by Frame Field Learning

2021 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2021
While state of the art image segmentation models typically output segmentations in raster format, applications in geographic information systems often require vector polygons. To help bridge the gap between deep network output and the format used in downstream tasks, we add a frame field output to a deep segmentation model for extracting buildings from
Nicolas Girard   +3 more
openaire   +1 more source

Building query optimizers for information extraction

ACM SIGMOD Record, 2009
Text documents often embed data that is structured in nature. This structured data is increasingly exposed using information extraction systems , which generate structured relations from documents, introducing an opportunity to process expressive, structured queries over text databases.
Alpa Jain   +2 more
openaire   +1 more source

Building precise classifiers with automatic rule extraction

Proceedings of ICNN'95 - International Conference on Neural Networks, 2002
An algorithm is presented to train a special kind of a local basis function classifier. The so-called "rectangular basis function network" (RecBFN) consists of hidden units, each covering a rectangular area in the input space, using a trapezoidal activation function.
Huber, Klaus-Peter, Berthold, Michael R.
openaire   +1 more source

Microtiles: Extracting Building Blocks from Correspondences

Computer Graphics Forum, 2012
AbstractIn this paper, we develop a theoretical framework for characterizing shapes by building blocks. We address two questions: First, how do shape correspondences induce building blocks? For this, we introduce a new representation for structuring partial symmetries (partial self‐correspondences), which we call “microtiles”.
Javor Kalojanov   +5 more
openaire   +3 more sources

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