  The inexorable growth of online shopping and e-commerce demands scalable and
robust machine learning-based solutions to accommodate customer requirements.
In the context of automatic tagging classification and multimodal retrieval,
prior works either defined a low generalizable supervised learning approach or
more reusable CLIP-based techniques while, however, training on closed source
data. In this work, we propose OpenFashionCLIP, a vision-and-language
contrastive learning method that only adopts open-source fashion data stemming
from diverse domains, and characterized by varying degrees of specificity. Our
approach is extensively validated across several tasks and benchmarks, and
experimental results highlight a significant out-of-domain generalization
capability and consistent improvements over state-of-the-art methods both in
terms of accuracy and recall. Source code and trained models are publicly
available at: https://github.com/aimagelab/open-fashion-clip.
