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MIRAGE

This is the main working branch of MIRAGE. It uses the Stable Cascade diffusion model for reconstructions, and a set of Ridge regression models as the decoding backbone.

To install the proper environment, follow src/setup.sh.

To use this branch, you must also clone the StableCascade repo from https://github.com/Stability-AI/StableCascade.git into your src directory, such that it is located at `MIRAGE/src/StableCascade/

You will need a checkpoint for the VDVAE to use the low level pipeline, you can download the checkpoint using the following command:

  • wget https://openaipublic.blob.core.windows.net/very-deep-vaes-assets/vdvae-assets-2/imagenet64-iter-1600000-model-ema.th

It should download the Stable Cascade models you need automatically, but if it doesn't, you can also download the following files from the stable cascade huggingface repo, and place them into your cache_dir.

  • effnet_encoder.safetensors
  • previewer.safetensors
  • stage_a.safetensors
  • stage_b.safetensors
  • stage_c.safetensors

Installation

  1. Git clone this repository:
git clone https://github.com/MedARC-AI/MIRAGE.git
  1. Download necessary project files from the two hugginface repositories and place them in the same folder as your git clone.

Warning: This will download over 300 GB of data! You may want to only download some parts of the huggingface dataset (e.g., not all the pretrained models contained in "train_logs", only one of the preparations of brain activity—whole brain or not—whole brain betas are only necessary for SNR thresholding.)

cd MIRAGE
git clone https://huggingface.co/datasets/pscotti/mindeyev2 .
git clone https://huggingface.co/datasets/reesekneeland/MIRAGE/ .

or for specifically downloading only parts of the dataset (will need to edit depending on what you want to download):

from huggingface_hub import snapshot_download, hf_hub_download
snapshot_download(repo_id="pscotti/mindeyev2", repo_type = "dataset", revision="main", allow_patterns="*.tar",
    local_dir= "your_local_dir", local_dir_use_symlinks = False, resume_download = True)
hf_hub_download(repo_id="pscotti/mindeyev2", filename="coco_images_224_float16.hdf5", repo_type="dataset")
  1. Run . src/setup.sh to install a new "mei-env" virtual environment. Make sure the virtual environment is activated with "source mei-env/bin/activate".

Usage

  • src/Train.ipynb trains models using our ridge regression backbone
  • src/recon_inference_mi.ipynb will run inference on the NSD Imagery dataset using a trained model, outputting tensors of reconstructions/predicted captions/etc.
  • src/final_evaluations_multi_mi.ipynb will compute quantitative metrics