AI Image Captioning: How Machines Describe What They See

Image captioning combines computer vision and natural language processing to generate human-readable descriptions of images.

How Image Captioning Works

Modern captioning models use an encoder-decoder architecture:

1. Vision Encoder (e.g., ViT): Extracts visual features from the image

2. Language Decoder (e.g., GPT-2): Generates text based on those features

3. Attention mechanism: Focuses on relevant image regions while generating each word

Applications

Tips for Better Captions

Generate captions for any image with our Image Captioner tool.

Need finer-grained labels instead of a single caption? Our Image Classifier returns the top-5 predictions with confidence scores.