Cross-Modal Retrieval in Multimodal AI

Instruction: Describe methods to implement cross-modal retrieval in a multimodal AI system, focusing on retrieving text-based information using image queries.

Context: This question tests the candidate's understanding of cross-modal retrieval techniques, showcasing their knowledge in linking and interpreting data across different modalities.

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For image-to-text retrieval, I would index permitted text passages or captions using the text encoder of an aligned image-text model. Encode the query image with its compatible image encoder, normalize nonzero embeddings, retrieve nearby text vectors by cosine similarity, and return the original text with its source...

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