The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Download
Publications Copernicus
Download
Citation
Articles | Volume XLVIII-4/W3-2022
https://doi.org/10.5194/isprs-archives-XLVIII-4-W3-2022-187-2022
https://doi.org/10.5194/isprs-archives-XLVIII-4-W3-2022-187-2022
02 Dec 2022
 | 02 Dec 2022

INVESTIGATING DIFFERENT SIMILARITY METRICS USED IN VARIOUS RECOMMENDER SYSTEMS TYPES: SCENARIO CASES

O. Stitini, S. Kaloun, and O. Bencharef

Keywords: Recommendation System RS, Similarity, Correlation, Distance, Item-based filtering, Collaborative Filtering, Content-based Filtering, Hybrid Filtering

Abstract. A recommendation system represents a very efficient way to propose solutions adapted to customers needs. It allows users to discover interesting items from a large amount of data according to their preferences. To do this, it uses a similarity metric, which determines how similar two users or products are. In the case of recommender systems, similarity computation is a practical step. The calculation of similarity may be used for both items and users. Following the similarity calculation, a user or item with a comparable computation value can be recommended together with the goods to a user with similar preferences. The user’s requirements influence the choice of similarity metric. This paper explores various similarity measurement methods employed in recommender systems. We compare correlation and distance techniques to determine the capabilities of different similitude calculation algorithms and synthesize which similarity measure is adapted for which type of recommendation.