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Artemis presentation
1. A Non-parametric Unsupervised Approach
for Content Based Image Retrieval and
Clustering
Technical
University
of
Crete
Authors:
Konstantinos Makantasis (Technical University of Crete)
Anastasios Doulamis (Technical University of Crete)
Nikolaos Doulamis (Cyprus University of Technology)
4th Workshop on Analysis and Retrieval of Tracked Events and Motion in Imagery Streams (ARTEMIS 2013)
2. OUTLINE
System Overview
Web Query
Image Retrieval
Outliers Removal
Image Clustering
Results
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS (ARTEMIS
2013)
3. SYSTEM OVERVIEW
Web Query
Image Retrieval
Image Clustering
Fully Automatic CBIR
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS
(ARTEMIS 2013)
4. WEB QUERY – IMAGE RETRIEVAL
Query
Flickr Image Database
Flickr API in Python
Query keywords are
associated with images’ title
Retrieval
Retrieved Set: hundreds to
thousands of photos
Retrieved Content: cultural
heritage monuments
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS
(ARTEMIS 2013)
5. OUTLIERS REMOVAL (1)
Retrieved dataset contains many
outliers (visually dissimilar images)
Inconsistent human generated tags
Uninformative machine generated
tags
Absence of camera generated meta-
data
(Retrieved dataset for “Porta Nigra”)
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS
(ARTEMIS 2013)
6. OUTLIERS REMOVAL (2)
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS
(ARTEMIS 2013)
7. OUTLIERS REMOVAL (3)
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS
(ARTEMIS 2013)
8. OUTLIERS REMOVAL (4)
Initial
Retrieved Set
Visually
Similar Images
Outliers
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS
(ARTEMIS 2013)
10. EXPERIMENTAL RESULTS (1)
Queries for 3 cultural heritage monuments
Porta Nigra
Parthenon, Athens
Descobrimentos
Initial Set
Outliers
Final Set
Number of Clusters
Porta Nigra
500
227 (45.4%)
273 (54.6%)
2
Parthenon
500
321 (64.2%)
179 (35.8%)
1
Descobrimentos
500
104 (20.8%)
396 (79.2%)
2
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS
(ARTEMIS 2013)
11. EXPERIMENTAL RESULTS (2)
Porta Nigra
Initial
retrieved
Set
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS
(ARTEMIS 2013)
14. CONTRIBUTION
Fully Automatic and Non-parametric algorithm
Handle digital and analog “born” images
Handle historic images
Based only on visual information
No a priori knowledge of the dataset
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS
(ARTEMIS 2013)
15. QUESTIONS
4TH WORKSHOP ON ANALYSIS AND RETRIEVAL OF TRACKED EVENTS AND MOTION IN IMAGERY STREAMS
(ARTEMIS 2013)