Consider a scenario where you're building a multimodal model to generate image captions. You've pre-trained a large language model (LLM) on a massive text corpus and a convolutional neural network (CNN) on ImageNet. How would you effectively combine these pre- trained components for your image captioning task, considering the need to maintain high caption quality and training efficiency?
Correct Answer: A,D
Fine-tuning both the CNN and LLM jointly allows the model to adapt both visual feature extraction and language generation to the specific task of image captioning, leading to potentially higher quality captions. However, this can be computationally expensive. Using a transformer-based encoder to process both modalities before the LLM decoder allows for effective cross-modal attention and fusion, which is also a strong approach. Freezing either the CNN or LLM limits the model's ability to adapt. Training separately and averaging outputs is unlikely to produce coherent captions.