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18th International Conference on Similarity Search and Applications, SISAP 2025
Reykjavik, Iceland, October 1-3, 2025
https://www.sisap.org/2025/
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==== Important Dates ====

Regular and Special Session Papers
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Abstract deadline: May 11, 2025 (AoE)
Paper deadline: May 18, 2025 (AoE)
Paper notification: July 14, 2025 (AoE)
Camera-ready due: July 31, 2025 (AoE)

Demonstration and Doctoral Symposium Papers
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Paper deadline: June 6, 2025 (AoE)
Paper notification: July 14, 2025 (AoE)
Camera-ready due: July 31, 2025 (AoE)



=== Scope ===
The 18th International Conference on Similarity Search and Applications (SISAP) is an annual forum for researchers and application developers in the area of similarity data management. It aims at the technological problems shared by numerous application domains, such as data mining, information retrieval, multimedia retrieval, computer vision, pattern recognition, computational biology, geography, biometrics, machine learning, and many others that make use of similarity search as a necessary supporting service. From its roots in metric indexing, SISAP has expanded to become the only international conference entirely devoted to all issues surrounding the theory, design, analysis, practice, and application of content-based and feature-based similarity search. Since 2021, SISAP has been a *CORE Rank B* conference.

The conference proceedings will be published by Springer as a volume in the Springer Lecture Notes in Computer Science (LNCS) series.


=== Important Additional Scholarly Activities at SISAP ===
-SISAP Indexing Challenge: https://sisap-challenges.github.io/2025/index.html
-Fifth Doctoral Symposium on Similarity Search and Applications: https://www.sisap.org/2025/doctoralsymposium.html

=== Special Sessions ===
Special sessions are mini-venues, each focusing on one state-of-the-art research direction within the field of similarity search and applications. For SISAP 2025, we call for contributions for the following two special sessions:

– * IRMC: Interactive Retrieval for Multimedia Collections *
This session focuses on innovative methods and systems that enhance user interaction and experience in multimedia retrieval, covering areas such as user-centric interfaces, relevance feedback mechanisms, and interactive search paradigms.
Learn more: https://www.sisap.org/2025/call4specialsessionpapers.html#irmc

– * BRIDGES: Bridging Past and Present: Similarity Search for Digital Cultural Heritage and GLAM Content *
This session focuses on advances in similarity search and retrieval techniques for digital cultural heritage and GLAM (Galleries, Libraries, Archives, and Museums) content, addressing both technical innovations and real‐world applications. The session aims to bring together researchers, practitioners, and GLAM professionals to explore novel methodologies, discuss challenges, and showcase successful implementations of similarity‐based retrieval in cultural heritage contexts.
Learn more:https://www.sisap.org/2025/call4specialsessionpapers.html#bridges

=== Regular and Special Session Papers ===
The organisers of SISAP 2025 call for novel and original research papers that address the various topics of interest related to the conference. We encourage contributions both to theoretical aspects and applications.
Full papers (from 9 to 14 pages) are expected to be descriptions of complete technical work, whereas short papers (of up to 8 pages) can describe innovative approaches or preliminary results which may nevertheless require more work to mature. Vision papers and other position papers should be submitted as short research papers.
Special session papers will supplement the regular research papers and be included in the proceedings of SISAP 2025, which will be published by Springer.
Regular and special session research papers will be peer-reviewed in a double-blind review process. Thus, the submissions must be properly anonymized.
A small selection of the best papers presented at the conference will be recommended for inclusion in a special issue of Elsevier’s Information Systems journal. These extended versions will be subject to a second round of peer review at the journal.
The Best Paper will be recognized with a certificate and a monetary prize, thanks to Springer's sponsorship.


=== Demonstration Papers ===
SISAP 2025 invites novel, impactful demonstrations aligned with its topics of interest. Submissions (up to 8 pages, including references) must include a mandatory 1-page PDF appendix describing how the demo will be conducted on-site. Demonstrations will be evaluated on novelty, technical challenges, and on-site impact in a single-blind review process.
Learn more: https://www.sisap.org/2025/demonstrations.html

=== Doctoral Symposium Papers ===
SISAP 2025 Doctoral Symposium provides a forum for PhD students to present their research ideas and receive feedback from senior members of the research community. The Symposium fosters a collaborative environment, encouraging constructive discussions and sharing of ideas.
The doctoral symposium papers will be peer-reviewed in a single-blind review process.
Learn more: https://www.sisap.org/2025/doctoralsymposium.html


=== SISAP Indexing Challenge ===
The SISAP Indexing Challenge is an event for researchers and practitioners to test new and/or well-tuned and optimised indexing approaches for shared tasks in laboratory and practical conditions. The Indexing Challenge results provide valuable comparisons of competing approaches and their implementations from given viewpoints and environments.
The Indexing Challenge papers will be peer-reviewed in a single-blind review process.
Learn more: https://sisap-challenges.github.io/2025/index.htm


=== Topics of interest ===
Topics of interest to the SISAP community include (but are not limited to) the following:

Similarity
*Similarity queries (k-NN, range, reverse NN, top-k, Approximate and/or precise solutions, etc.)
*Similarity measures (for vectors, graphs, structures, time series, complex data, tensors, secondary similarity, etc.)
*Similarity operations (joins, ranking, classification, categorization, filtering, etc.)

Scalability
*Indexing and access methods for similarity-based processing
*High-performance/large-scale similarity search (distributed, parallel, etc.)
*Data management (transaction support, dynamic maintenance, etc.)

Theory
*Models of similarity
*Intrinsic dimensionality and Curse of dimensionality
*Discriminability and contrast
*Languages for similarity databases
*Manifolds and subspaces

Analytics, Learning, Artificial Intelligence
*Feature selection and extraction for similarity search
*Representations learning for feature extraction
*Visual analytics for similarity-based operations
*Learning/adaptive similarity measures
*Similarity in learning and mining
*Merging/combining multiple similarity modalities

Evaluation
*Evaluation techniques for similarity queries and operations
*Cost models and analysis for similarity data processing
*Performance studies and comparisons
*Test collections and benchmarks

Applications
*Multimedia retrieval systems
*Dense retrieval
*Vector databases
*Similarity search in emerging data domains
*Applications of similarity-based operations
*Industrial applications and case studies
*Similarity search cloud services
*Security and privacy of in similarity search
*Similarity for forensics and security


=== Organization ===
Steering Committee
*Giuseppe Amato, CNR-ISTI, Italy
*Edgar Chávez, CICESE, México
*Stéphane Marchand-Maillet, University of Geneva, Switzerland
*Marco Patella, University of Bologna, Italy
*Benjamin Kimia,Brown Unversity, USA
*Oscar Pedreira, University of A Coruña, Spain

General Co-Chairs
*Björn Þór Jónsson, Reykjavik University, Iceland
*Lucia Vadicamo, CNR-ISTI, Italy

Program Committee Co-Chairs
*Giuseppe Amato, CNR-ISTI, Italy
*Vladimir Mic, Aarhus University, Denmark
*Agma J. M. Traina, University of São Paulo, Brazil

Demonstration Chair
*Gylfi Þór Guðmundsson, Reykjavik University, Iceland

PhD Symposium Chair
*Laurent Amsaleg, IRISA-CNRS, France

Publications Chair
*Nicola Messina, CNR-ISTI, Italy

Publicity Chair
*Luca Ciampi, CNR-ISTI, Italy
*Conrado Martinez, Universitat Politècnica de Catalunya, Spain

SISAP Indexing Challenge Chairs
*Eric S. Tellez, CICESE-INFOTEC-CONACyT, Mexico
*Martin Aumüller, ITU Copenhagen, Denmark
*Vladimir Mic, Aarhus University, Denmark
*Edgar Chávez, CICESE, México