Charm-tokenizer 1.0.9

Official implementation of Charm tokenizer for ViTs

Charm: The Missing Piece in ViT fine-tuning for Image Aesthetic Assessment

Accepted at CVPR 2025

We introduce Charm , a novel tokenization approach that preserves Composition, High-resolution, Aspect Ratio, and Multi-scale information simultaneously. By preserving critical aesthetic information, Charm achieves significant performance improvement across different image aesthetic assessment datasets.

Quick Inference

• Step 1) Check our GitHub Page and install the requirements.

pip install -r requirements.txt

• Step 2) Install Charm tokenizer.

pip install Charm_tokenizer

• Step 3) Tokenization + Position embedding preparation

from Charm_tokenizer.ImageProcessor import Charm_Tokenizer

img_path = r"img.png"

charm_tokenizer = Charm_Tokenizer(patch_selection='frequency', training_dataset='tad66k', without_pad_or_dropping=True)
tokens, pos_embed, mask_token = charm_tokenizer.preprocess(img_path)

The mask_token indicates which patches are in high resolution and which are in low resolution.

• Step 4) Predicting aesthetic score

from Charm_tokenizer.Backbone import backbone

model = backbone(training_dataset='tad66k', device='cpu')
prediction = model.predict(tokens, pos_embed, mask_token)

Note:

1. While random patch selection during training helps avoid overfitting,for consistent results during inference, fully deterministic patch selection approaches should be used.
2. For the training code, check our GitHub Page.