Stella Yu : Publications

Hierarchical Scene Annotation
Michael Maire and Stella X. Yu and Pietro Perona
British Machine Vision Conference, Bristol, UK, 9-13 September 2013
Paper | Slides | Dataset | Code

Abstract
We present a computer-assisted annotation system, together with a labeled dataset and benchmark suite, for evaluating an algorithm's ability to recover hierarchical scene structure. We evolve segmentation groundtruth from the two-dimensional image partition into a tree model that captures both occlusion and object-part relationships among possibly overlapping regions. Our tree model extends the segmentation problem to encompass object detection, object-part containment, and figure-ground ordering.

We mitigate the cost of providing richer groundtruth labeling through a new web-based annotation tool with an intuitive graphical interface for rearranging the region hierarchy. Using precomputed superpixels, our tool also guides creation of user-specified regions with pixel-perfect boundaries. Widespread adoption of this human-machine combination should make the inaccuracies of bounding box labeling a relic of the past.

Evaluating the state-of-the-art in fully automatic image segmentation reveals that it produces accurate two-dimension partitions, but does not respect groundtruth object-part structure. Our dataset and benchmark is the first to quantify these inadequacies. We illuminate recovery of rich scene structure as an important new goal for segmentation.


Keywords
image annotation, scene dataset, object segmentation, occlusion