Skews in the Phenomenon Space Hinder Generalization in Text-to-Image Generation

master branch for public viewing

development branch contains notebooks for early dataset exploration, debugging, unbatched inference and making plots.

Modify <largefiles_dir> if you keep large files in a separate directory.

Calculation of the proposed metrics, COMPLETENESS and BALANCE: quantifying_skew.ipynb

Setup

1. Python Environment

git clone [email protected]:zdxdsw/skewed_relations_T2I.git &&
cd skewed_relations_T2I &&
python3 -m venv venv &&
source venv/bin/activate &&
pip install --upgrade pip &&
pip install -r requirements.txt

Toubleshooting: If you're having ImportError or imcompatibility issues, try installing the specific version. pip install torch==2.2.2 torchvision==0.17.2 torchaudio==2.2.2 --index-url https://download.pytorch.org/whl/cu118. This requires cuda11.8. If your machine supports multiple cuda versions, you might want to do the following: export LD_LIBRARY_PATH=/usr/local/cuda-11.8/lib.

2. Accelerate config

$ accelerate config # This will automatically generate ~/.cache/huggingface/accelerate/default_config.yaml.

Example config:

compute_environment: LOCAL_MACHINE
debug: false
distributed_type: MULTI_GPU
downcast_bf16: 'no'
gpu_ids: all
machine_rank: 0
main_training_function: main
mixed_precision: fp16
num_machines: 1
num_processes: 4
rdzv_backend: static
same_network: true
tpu_env: []
tpu_use_cluster: false
tpu_use_sudo: false
use_cpu: false

Pixel Diffusion Experiments with Synthetic Images

1. Training configs

Config your training hyperparameters in skewed_relations_T2I/scripts/diffuser_icons/config.py.

To reproduce results in our paper, copy configs from skewed_relations_T2I/scripts/diffuser_icons/configs/pixel_icons_singleobj_pt_config.py and skewed_relations_T2I/scripts/diffuser_icons/configs/pixel_icons_twoobjs_ft_config.py

2. Synthetic dataset

Due to the simplicity of synthetic data, we do not save a copy. Data is constructed on the fly in the dataloader. Please refer to dataset.py for how splits with different degrees of skew are created, and this summary chart for mapping split_method to metrics.

3. Training commands

cd skewed_relations_T2I/scripts/diffusion_icons
accelerate launch trainer.py

4. Testing commands

cd skewed_relations_T2I/scripts/diffusion_icons
accelerate launch tester.py --load_from_dir <handle> --load_from_epochs <load_from_epochs> --eval_batch_size <eval_batch_size>

<handle>: Every experiment will have a unique identifier, created from the timestamp at which it is launched. E.g. 0515_222602 (%m%d_%H%M%S)

<load_from_epochs>: String seperated by spaces. E.g. "99 199 299 399 499 599"

<eval_batch_size>: Per gpu batch size.

By default, tester.py will run inference on both training and testing set. To opt out from training (testing) set, set --num_iter_train 0 (--num_iter_test 0).

5. Evaluation script

Fixed filters are created from GTH icons. Then generated images are evaluated via pixel-level pattern matching. Please refer to this notebook.

6. Ablation experiments

To disable image positional embeddings, comment the line patch_size = 2 in config.py or set patch_size = None. (It needs to re-run both single-obj pretraining and two-objs finetuning.)

To switch language encoder from T5 to CLIP, modify config.py: lm = "t5" <--> lm = "clip_"

Pixel Diffusion Experiments with Natural Images

1. Download WhatsUp dataset

Images are released by the WhatsUp official repo. Download controlled_clevr.tar.gz from https://drive.google.com/drive/u/0/folders/164q6X9hrvP-QYpi3ioSnfMuyHpG5oRkZ.

cd <largefiles_dir>/skewed_relations_T2I &&
mkdir -p data/whatsup_vlms

Move the folder controlled_clevr to <largefiles_dir>/skewed_relations_T2I/data/whatsup_vlms/.

WhatsUp annotation files are preprocessed --- filtering for selected relations & objects --- and saved to skewed_relations_T2I/data/aggregated. Refer to whatsup_preprocess.ipynb for preprocessing code.

2. Training configs

Config your training hyperparameters in skewed_relations_T2I/scripts/diffuser_real/config.py.

To reproduce results in our paper, copy configs from skewed_relations_T2I/scripts/diffuser_real/configs/pixel_natural_singleobj_pt_config.py and skewed_relations_T2I/scripts/diffuser_real/configs/pixel_natural_twoobjs_ft_config.py

3. Drawing subsamples

Instances are converted to the tuple representation $(f_1, r_1, f_2, r_2)$ and subsampled in the tuple representation space. Please refer to dataset.py for how subsamples with different degrees of skew are drawn, and this summary chart for mapping subsample_method to metrics.

4. Training commands

cd skewed_relations_T2I/scripts/diffusion_real
accelerate launch trainer.py

5. Testing commands

cd skewed_relations_T2I/scripts/diffusion_real
accelerate launch tester.py --load_from_dir <handle> --load_from_epochs <load_from_epochs> --eval_batch_size <eval_batch_size>

<handle>: Every experiment will have a unique identifier, created from the timestamp at which it is launched. E.g. 0515_222602 (%m%d_%H%M%S)

<load_from_epochs>: String seperated by spaces. E.g. "99 199 299 399 499 599"

<eval_batch_size>: Per gpu batch size.

By default, tester.py will run inference on both training and testing set. To opt out from training (testing) set, set --num_iter_train 0 (--num_iter_test 0).

6. AutoEval with ViT

cd <largefiles_dir>/skewed_relations_T2I &&
mkdir autoeval

Download the finetuned ViT checkpoint from here (328MB) and move it to <largefiles_dir>/skewed_relations_T2I/autoeval.

For your reference, we provide code for finetuning ViT.

7. Evaluation commands

cd skewed_relations_T2I/scripts/diffusion_real
python eval.py --ckpt_handle <handle> --epochs_for_eval <epochs_for_eval> --output_folder <output_folder> # single_gpu job

<handle>: Every experiment will have a unique identifier, created from the timestamp at which it is launched. E.g. 0515_222602 (%m%d_%H%M%S)

<epochs_for_eval>: String seperated by spaces. E.g. "1999 3999 5999"

<output_folder>: E.g. "output" or "output_withvae"

Latent Diffusion Experiments

1. Download pre-trained vae checkpoints from huggingface.

cd <largefiles_dir>/skewed_relations_T2I &&
mkdir -p from_pretrained/vae/sd2 &&
cd from_pretrained/vae/sd2 &&
wget https://huggingface.co/stabilityai/stable-diffusion-2-1/resolve/main/vae/config.json &&
wget https://huggingface.co/stabilityai/stable-diffusion-2-1/resolve/main/vae/diffusion_pytorch_model.bin &&
wget https://huggingface.co/stabilityai/stable-diffusion-2-1/resolve/main/vae/diffusion_pytorch_model.fp16.bin &&
wget https://huggingface.co/stabilityai/stable-diffusion-2-1/resolve/main/vae/diffusion_pytorch_model.fp16.safetensors &&
wget https://huggingface.co/stabilityai/stable-diffusion-2-1/resolve/main/vae/diffusion_pytorch_model.safetensors

2. Training configs

To reproduce results in our paper, copy configs from

• Experiments on synthetic images: skewed_relations_T2I/scripts/diffuser_icons/configs/vae_icons_singleobj_pt_config.py and skewed_relations_T2I/scripts/diffuser_icons/configs/vae_icons_twoobjs_ft_config.py

• Experiments on natural images: skewed_relations_T2I/scripts/diffuser_real/configs/vae_natural_singleobj_pt_config.py and skewed_relations_T2I/scripts/diffuser_real/configs/vae_natural_twoobjs_ft_config.py

3. Training/Testing/Evaluation commands

Same as previous sections.

Credits

@huggingface Diffusers

@amitakamath whatsup_vlms

Cite Us 🙏

@article{chang2024skews,
  title={Skews in the Phenomenon Space Hinder Generalization in Text-to-Image Generation},
  author={Chang, Yingshan and Zhang, Yasi and Fang, Zhiyuan and Wu, Yingnian and Bisk, Yonatan and Gao, Feng},
  journal={arXiv preprint arXiv:2403.16394},
  year={2024}
}