SHREC 2011 - Shape Retrieval Contest of Non-rigid 3D Watertight Meshes

Call For Participation:
SHREC 2011 - Shape Retrieval Contest of Non-rigid 3D Watertight Meshes

Introduction


As shown in the figure, non-rigid 3D objects are commonly seen in our surroundings. However, previous efforts have been mainly devoted to the retrieval of rigid 3D models, and thus comparing non-rigid 3D shapes is still a challenging problem in content-based 3D object retrieval. Therefore, we organize this track to promote the development of non-rigid 3D shape retrieval.

The objective of this track is to evaluate the performance of 3D shape retrieval approaches on a large-scale database of non-rigid 3D watertight meshes generated by our group.

Task description
The task is to evaluate the dissimilarity between every two objects in the database and then output the dissimilarity matrix.

Data set
Our large-scale database consists of 600 non-rigid 3D objects (see the figure for some examples) that are created by our group using some modeling software and our own codes. We classified these models properly to make sure that every class contains equal number of models. The models are represented as watertight triangle meshes and the file format is selected as the ASCII Object File Format (*.off).

(Note that: Some of these models we recreated and modified with permission are originally from several publicly available databases: such as McGill database, TOSCA shapes, Princeton Shape Benchmark, etc.)

Evaluation Methodology
We will employ the following evaluation measures: Precision-Recall curve; E-Measure; Discounted Cumulative Gain; Nearest Neighbor, First-Tier (Tier1) and Second-Tier (Tier2).

Procedure
The following list is a step-by-step description of the activities:

Schedule
January 24 - Call for participation.
January 28 - 10 sample models of the test database will be available on line.
February 1 - Please register before this date.
February 1 - Distribution of the whole database. Participants can start the retrieval.
February 7 -
(extended to February 9)
Submission of results (dissimilarity matrix) and a one page description of their method(s)).
February 10 - Distribution of relevance judgments and evaluation scores.
February 11 - Submission of final descriptions (one page) for the contest proceedings.
February 15 - Track is finished, and results are ready for inclusion in a track report
February 22 - Camera ready track papers submitted for printing
April 10 - EUROGRAPHICS Workshop on 3D Object Retrieval including SHREC'11

Organizers
Zhouhui Lian , Afzal Godil

Please Cite the paper :
SHREC'11 Track: Shape Retrieval on Non-rigid 3D Watertight Meshes, Z. Lian, A. Godil, B. Bustos, M. Daoudi, J. Hermans, S. Kawamura, Y. Kurita, G. Lavoué, H.V. Nguyen, R. Ohbuchi, Y. Ohkita, Y. Ohishi, F. Porikli, M. Reuter, I. Sipiran, D. Smeets, P. Suetens, H. Tabia, and D. Vandermeulen , In: H. Laga and T. Schreck, A. Ferreira, A. Godil, I. Pratikakis, R. Veltkamp (eds.), Proceedings of the Eurographics/ACM SIGGRAPH Symposium on 3D Object Retrieval, 2011. pdf paper