Welcome to the Partial Matching Track on Watertight Models of SHape REtrieval Contest 2007

What's SHREC?

SHREC '07 is a competition whose objective is to evaluate the effectiveness of 3D-shape retrieval algorithms. This year the contest is divided into different tracks. This page refers to the Partial Matching track.

Description of the track

Two collections of 3D models will be provided to the participants of the track: the data-set and the query-set:

• The data-set collection consists of 400 3D watertight models represented in the ASCII Off format.
• The query-set collection consists of 30 3D watertight models, each one obtained by merging or removing several subparts of models belonging to the data-set. Also in this case the query models are represented in the ASCII Off format.

Watertight Models are object models represented by seamless surfaces, i. e. without defective holes or gaps. Each query model shares common subparts with (possibly) more than one model belonging to the data-set. Given a query model, the goal of this track is the retrieval of the largest number of models belonging to the data-set, such that they share similar subparts with the given query.

A set of relevant, marginally relevant and not relevant models (belonging to the data-set) is associated to each query model. This set (the ground-truth) is defined a priori by the organizers of the track and will be used to evaluate the performance of the retrieval algorithms. The performance will be evaluated by using the measures and tools developed in SHREC '06.

Results

Results are now ready. Here you can find all the most significant graphs we extracted.

Given a database of 400 watertight models, and a set of 30 hybrid query models, we defined for each query the set of highly and marginally relevant items, that is, respectively, the classes which share a similar subpart with the query, and those ones which are reasonably similar to it.

Dataset	Queryset

Query Number	Relevant Classes	Marginally Relevant Classes
1	cup, teddy	vase, four legs
2	human, table	armadillo, chair
3	buste, mechanic
4	plier, spring	airplane, bird
5	ant, glasses	octopus
6	four legs, airplane	bird, plier, teddy
7	armadillo, vase, bearing	human, cup
8	fish, bird, mechanic	airplane, plier
9	chairs, bearings	tables
10	human, table	armadillo, chair
11	fisher, hand
12	human, octopus	armadillo, ant
13	hand, spring
14	human, fish	armadillo
15	four legs, vase	cup, teddy
16	bird, buste	airplane, plier
17	chair, plier	airplane, bird, table
18	ant, octopus
19	airplane, armadillo	human, bird, plier
20	teddy, spectacle	four leg
21	cup, springs	vase
22	four legs, cup	vase, teddy
23	armadillo, bearing, bird	human, airplane, plier
24	airplane, bird	plier
25	head, vase	cup
26	chair, table
27	teddy, hand	four legs
28	octopus, plier	bird, airplane, ant
29	airplane, mechanical	bird, plier
30	four legs, human	armadillo, teddy

Here you can find all sort of graphs we computed, and a "readme" file which explains what is in each folder.