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:

• The participants must register by sending a message to %20shrec [at] nist.gov (SHREC[at]nist[dot]gov). Early registration is encouraged, so that we get an impression of the number of participants at an early stage.
• The test database will be made available via this website. Participants should also test their methods on the database used in last year's SHREC Non-rigid track and submit their results to get the password to access the new database.
• Participants will submit the dissimilarity matrix (also named as distance matrix) for the test database. Upto 5 matrixs per group may be submitted, resulting from different runs. Each run may be a different algorithm, or a different parameter setting. More information on the dissimilarity matrix file format
• The evaluations will be done automatically.
• The organization will release the evaluation scores of all the runs.
• The participants write a one page description of their method and the organizers will verify the submitted results.
• The track results are combined into a joint paper, published in the proceedings of the Eurographics Workshop on 3D Object Retrieval.
• The description of the tracks and their results are presented at the Eurographics Workshop on 3D Object Retrieval (April 10, 2011).

Schedule

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.