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Hypernymy Understanding Evaluation of Text-to-Image Models via WordNet Hierarchy

This repository contains the official implementation of the In-Subtree Probability and the Subtree Coverage Score, two metrics for measuring the hypernymy capabilities in text-to-image generation. Also, this repository contains the code of experiments from the corresponding paper.

Installation

1. Clone the repository.
2. pip install -r requirements.txt
3. pip install -e .
4. If you want to evaluate GLIDE, install it using the tutorial from the official repository.

How to evaluate a model

• Generate synset images from the model using generate_images.py.
  • Example: python scripts/generate_images.py --model_name=CompVis/ldm-text2im-large-256 --images_per_synset=32 --remove_leaves=True --batch_size=16 --image_size=224 --images_path=PATH_TO_IMAGES --gpu_id=0 --use_float16=True
• Classify them using classify_images.py.
  • Example: python scripts/classify_images.py --model_name=vit_b_16 --images_path=PATH_TO_IMAGES --logits_path=PATH_TO_LOGITS --batch_size=256 --gpu_id=0
• Calculate the metrics using calculate_metrics.py.
  • The metrics proposed in the paper are called SubtreeInProb and SubtreeIS.
  • Example: python scripts/calculate_metrics.py --logits_path=PATH_TO_LOGITS/vit_b_16_logits.npz --metric_names=SubtreeInProb,SubtreeIS --metrics_path=PATH_TO_METRICS
  • You also need to divide the SCS (SubtreeIS value) by ~1.6236 to get the leaderboard value.

For further details on how to run the scripts, please read the absl app flags.

Structure of the repository

• laion_400M/ – code for counting lemmas in laion_400M.
• notebooks/ – jupyter notebooks with our analyses.
• scripts/ – code for launching metric computations.
• src/ – code for our metrics.
• wordnet_classes/ – imagenet to wordnet mappings.

Scripts

• generate_images.py – generates images for synsets using the Diffusers text-to-image pipeline.
• generate_images_glide.py – generates images for synsets from GLIDE.
• classify_images.py – classifies the generated images.
• calculate_metrics.py – calculates the metrics from logits.
• generate_coco.py – generates MS-COCO samples from a diffusers text-to-image pipeline.
• generate_coco_glide.py – generates MS-COCO samples from GLIDE.

Notebooks

• analysis.ipynb – computing the main metrics from logits, granular comparison, unknown concepts.
• sweeps.ipynb – guidance and number of diffusion steps sweep plots.
• human_eval.ipynb – human evaluation results.
• coco_metrics.ipynb – computing MS COCO metrics (FID and CLIPScore).
• train_data_correlation.ipynb – computing correlation between synset metric and frequency in dataset.

For further details on how to run the scripts, please read the absl app flags.