A Hierarchical Connection Graph Algorithm for Gable-Roof Detection in Aerial Image
A Hierarchical Connection Graph Algorithm for Gable-Roof Detection in Aerial Image
复制标题
航拍图像山墙屋顶检测的层次连接图算法
DOI:
10.1109/lgrs.2010.2055536
复制
发表时间:
2011
影响因子:
4.8
通讯作者:
中科院分区:
文献类型:
--
作者:
In this letter, we present a hierarchical connection graph (HCG) algorithm based on a self-avoiding polygon (SAP) model for detecting and extracting gable roofs from aerial imagery. The SAP model is a deformable shape model that is capable of representing gable roofs of various shapes and appearances. The model is composed of a sequence of roof-corner templates that are connected into a SAP, which serves as a flexible shape prior. An energy function that combines features from three channels (corner, boundary, and interior area) is defined over the sequence to quantify the variability in appearances of gable roofs. To infer the most probable state of the corner sequence for an input image, we use an efficient algorithm-called HCG algorithm. The algorithm converts the solution space of a SAP model into a directed graph (which we call “HCG”) and searches for the best path using dynamic programming (DP). It is efficient for two reasons: 1) By constructing an HCG, the algorithm can quickly prune out a large amount of invalid solutions using only geometric constraints, which are inexpensive to compute, and 2) by employing DP, the algorithm decomposes the searching problem into smaller overlapping subproblems and reuses energy scores, which are expensive to compute. Experimental results on a set of challenging gable roofs show that our algorithm has good performance and is computationally effective.
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影响因子:
4.5
作者:
Fischer, A;Kolbe, TH;Steinhage, V
通讯作者:
Steinhage, V
DOI:
10.1088/0305-4470/25/7/031
发表时间:
1992-04
期刊:
Journal of Physics A
影响因子:
--
作者:
M. Bousquet-Mélou
通讯作者:
M. Bousquet-Mélou
DOI:
10.2307/1907500
发表时间:
2022
期刊:
SSRN Electronic Journal
影响因子:
--
作者:
Manel Baucells;Sasa Zorc
通讯作者:
Manel Baucells;Sasa Zorc
DOI:
10.1007/bfb0015525
发表时间:
1996-04
期刊:
--
影响因子:
--
作者:
F. Bignone;O. Henricsson;P. Fua;M. Stricker
通讯作者:
F. Bignone;O. Henricsson;P. Fua;M. Stricker
影响因子:
8.2
作者:
K. Karantzalos;N. Paragios
通讯作者:
K. Karantzalos;N. Paragios