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Bottom-up/Top-Down Image Parsing by Attribute Graph Grammar
Beijing, China October 17-October 20
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/ICCV.2005.50Tenth IEEE International Conference o ...
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Feng Han, University of California at Los Angeles
Song-Chun Zhu, University of California at Los Angeles
In this paper, we present an attribute graph grammar for image parsing on scenes with man-made objects, such as buildings, hallways, kitchens, and living rooms. We choose one class of primitives — 3D planar rectangles projected on images, and six graph grammar production rules. Each production rule not only expands a node into its components, but also includes a number of equations that constrain the attributes of a parent node and those of its children. Thus our graph grammar is context sensitive. The grammar rules are used recursively to produce a large number of objects and patterns in images and thus the whole graph grammar is a type of generative model. The inference algorithm integrates bottom-up rectangle detection which activates top-down prediction using the grammar rules. The final results are validated in a Bayesian framework. The output of the inference is a hierarchical parsing graph with objects, surfaces, rectangles, and their spatial relations. In the inference, the acceptance of a grammar rule means a recognition of an object, and actions are taken to pass the attributes between a node and its parent through the constraint equations associated with this production rule. When an attribute is passed from a child node to a parent node, it is called bottom-up, and the opposite is called top-down.
Citation:
Feng Han, Song-Chun Zhu, "Bottom-up/Top-Down Image Parsing by Attribute Graph Grammar," iccv, vol. 2, pp.1778-1785, Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 2, 2005
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