CLIP4STR

This is a **third-party implementation** of the paper CLIP4STR: A Simple Baseline for Scene Text Recognition with Pre-trained Vision-Language Model. CLIP4STR aims to build a scene text recognizer with the pre-trained vision-language model. In this re-implementation, we try to reproduce the performance of the original paper and evaluate the effectiveness of pre-trained VL models in the STR area. ## Installation ### Prepare data First of all, you need to download the STR dataset. - We recommend you follow the instructions of [PARSeq](https://github.com/baudm/parseq) at its [parseq/Datasets.md](https://github.com/baudm/parseq/blob/main/Datasets.md) . The gdrive links are [gdrive-link1](https://drive.google.com/drive/folders/1NYuoi7dfJVgo-zUJogh8UQZgIMpLviOE) and [gdrive-link2](https://drive.google.com/drive/folders/1D9z_YJVa6f-O0juni-yG5jcwnhvYw-qC) from PARSeq. - For convenient, you can also download the STR dataset with real training images at [BaiduYunPan str_dataset](https://pan.baidu.com/s/1DY8zYYQ9EHi3_P9pY46DdQ?pwd=hpvw). - For the RBU(6.5M) training dataset, it is a combination of [the above STR dataset] + [val data of benchmarks (SVT, IIIT5K, IC13, IC15)] + [[Union14M_L_lmdb_format](https://1drv.ms/u/s!AotJrudtBr-K7xAHjmr5qlHSr5Pa?e=LJRlKQ)]. For convenient, you can also download at [BaiduYunPan str_dataset_ub](https://pan.baidu.com/s/1h8I1sUlhR9_YkD7YnEQaEA?pwd=cn67). - weights of CLIP pre-trained models: - [CLIP-ViT-B/32](https://openaipublic.azureedge.net/clip/models/40d365715913c9da98579312b702a82c18be219cc2a73407c4526f58eba950af/ViT-B-32.pt) - [CLIP-ViT-B/16](https://openaipublic.azureedge.net/clip/models/5806e77cd80f8b59890b7e101eabd078d9fb84e6937f9e85e4ecb61988df416f/ViT-B-16.pt) - [CLIP-ViT-L/14](https://openaipublic.azureedge.net/clip/models/b8cca3fd41ae0c99ba7e8951adf17d267cdb84cd88be6f7c2e0eca1737a03836/ViT-L-14.pt) - [OpenCLIP-ViT-B-16-DataComp-XL-s13B-b90K.bin](https://huggingface.co/laion/CLIP-ViT-B-16-DataComp.XL-s13B-b90K/blob/main/open_clip_pytorch_model.bin) - [OpenCLIP-ViT-L-14-DataComp-XL-s13B-b90K.bin](https://huggingface.co/laion/CLIP-ViT-L-14-DataComp.XL-s13B-b90K/blob/main/open_clip_pytorch_model.bin) - [OpenCLIP-ViT-H-14-laion2B-s32B-b79K.bin](https://huggingface.co/laion/CLIP-ViT-H-14-laion2B-s32B-b79K/blob/main/open_clip_pytorch_model.bin) - [appleDFN5B-CLIP-ViT-H-14.bin](https://huggingface.co/apple/DFN5B-CLIP-ViT-H-14/blob/main/open_clip_pytorch_model.bin) - For models from huggingface.co, you should rename them as the shown names. Generally, directories are organized as follows: ``` ${ABSOLUTE_ROOT} ├── dataset │ │ │ ├── str_dataset_ub │ └── str_dataset │ ├── train │ │ ├── real │ │ └── synth │ ├── val │ └── test │ ├── code │ │ │ └── clip4str │ ├── output (save the output of the program) │ │ ├── pretrained │ └── clip (download the CLIP pre-trained weights and put them here) │ └── ViT-B-16.pt │ ... ``` ### Dependency Requires `Python >= 3.8` and `PyTorch >= 1.12`. The following commands are tested on a Linux machine with CUDA Driver Version `525.105.17` and CUDA Version `11.3`. ``` conda create --name clip4str python=3.8.5 conda install pytorch==1.12.0 torchvision==0.13.0 torchaudio==0.12.0 -c pytorch pip install -r requirements.txt ``` If you meet problems in continual training of an intermediate checkpoint, try to upgrade your PyTorch ``` conda install pytorch==1.13.1 torchvision==0.14.1 torchaudio==0.13.1 pytorch-cuda=11.7 -c pytorch -c nvidia ``` ## Results ### CLIP4STR pre-trained on OpenAI WIT-400M `CLIP4STR-B` means using the `CLIP-ViT-B/16` as the backbone, and `CLIP4STR-L` means using the `CLIP-ViT-L/14` as the backbone. | Method | Train data | IIIT5K | SVT | IC13 | IC15 | IC15 | SVTP | CUTE | HOST | WOST | |------------|------------|--------|-------|-------|-------|-------|-------|-------|-------|-------| | | | 3,000 | 647 | 1,015 | 1,811 | 2,077 | 645 | 288 | 2,416 | 2,416 | | CLIP4STR-B | MJ+ST | 97.70 | 95.36 | 96.06 | 87.47 | 84.02 | 91.47 | 94.44 | 80.01 | 86.75 | | CLIP4STR-L | MJ+ST | 97.57 | 95.36 | 96.75 | 88.02 | 84.40 | 91.78 | 94.44 | 81.08 | 87.38 | | CLIP4STR-B | Real(3.3M) | 99.20 | 98.30 | 98.23 | 91.44 | 90.61 | 96.90 | 99.65 | 77.36 | 87.87 | | CLIP4STR-L | Real(3.3M) | 99.43 | 98.15 | 98.52 | 91.66 | 91.14 | 97.36 | 98.96 | 79.22 | 89.07 | | Method | Train data | COCO | ArT | Uber | | Checkpoint | |------------|------------|-------|--------|--------|-|--------| | | | 9,825 | 35,149 | 80,551 | | | |CLIP4STR-B | MJ+ST | 66.69 | 72.82 | 43.52 | | [a5e3386222](https://github.com/VamosC/CLIP4STR/releases/download/1.0.0/clip4str_base16x16_synth_a5e3386222.ckpt) | |CLIP4STR-L | MJ+ST | 67.45 | 73.48 | 44.59 | | [3544c362f0](https://zenodo.org/record/8369439) | |CLIP4STR-B | Real(3.3M) | 80.80 | 85.74 | 86.70 | | [d70bde1f2d](https://github.com/VamosC/CLIP4STR/releases/download/1.0.0/clip4str_base16x16_d70bde1f2d.ckpt) | |CLIP4STR-L | Real(3.3M) | 81.97 | 85.83 | 87.36 | | [f125500adc](https://zenodo.org/record/8369439) | ### CLIP4STR pre-trained on DataComp-1B, LAION-2B, and DFN-5B All models are trained on RBU(6.5M). | Method | Pre-train | Train | IIIT5K | SVT | IC13 | IC15 | IC15 | SVTP | CUTE | HOST | WOST | |------------|------------|------------|--------|-------|-------|-------|-------|-------|-------|-------|-------| | | | | 3,000 | 647 | 1,015 | 1,811 | 2,077 | 645 | 288 | 2,416 | 2,416 | | CLIP4STR-B | DC-1B | RBU | 99.5 | 98.3 | 98.6 | 91.4 | 91.1 | 98.0 | 99.0 | 79.3 | 88.8 | | CLIP4STR-L | DC-1B | RBU | 99.6 | 98.6 | 99.0 | 91.9 | 91.4 | 98.1 | 99.7 | 81.1 | 90.6 | | CLIP4STR-H | LAION-2B | RBU | 99.7 | 98.6 | 98.9 | 91.6 | 91.1 | 98.5 | 99.7 | 80.6 | 90.0 | | CLIP4STR-H | DFN-5B | RBU | 99.5 | 99.1 | 98.9 | 91.7 | 91.0 | 98.0 | 99.0 | 82.6 | 90.9 | | Method | Pre-train | Train | COCO | ArT | Uber | log | Checkpoint | |------------|----------------|------------|--------|--------|--------|-----|--------| | | | | 9,825 | 35,149 | 80,551 | | | |CLIP4STR-B | DC-1B | RBU | 81.3 | 85.8 | 92.1 | [6e9fe947ac_log](https://huggingface.co/mzhaoshuai/CLIP4STR/blob/main/clip4str_base_6e9fe947ac_log.txt) | [6e9fe947ac](https://huggingface.co/mzhaoshuai/CLIP4STR/blob/main/clip4str_base_6e9fe947ac.pt), [BaiduYun](https://pan.baidu.com/s/1KCmM4K16nslPoZbUPxIfnQ?pwd=g6z6) | |CLIP4STR-L | DC-1B | RBU | 82.7 |86.4 | 92.2 | [3c9d881b88_log](https://huggingface.co/mzhaoshuai/CLIP4STR/blob/main/clip4str_large_3c9d881b88_log.txt) | [3c9d881b88](https://huggingface.co/mzhaoshuai/CLIP4STR/blob/main/clip4str_large_3c9d881b88.pt), [BaiduYun](https://pan.baidu.com/s/1V1Wd114MUhszdPwQyD85DA?pwd=4q74) | |CLIP4STR-H | LAION-2B | RBU | 82.5 | 86.2 | 91.2 | [5eef9f86e2_log](https://huggingface.co/mzhaoshuai/CLIP4STR/blob/main/clip4str_huge_5eef9f86e2_log.txt) | [5eef9f86e2](https://huggingface.co/mzhaoshuai/CLIP4STR/blob/main/clip4str_huge_5eef9f86e2.pt), [BaiduYun](https://pan.baidu.com/s/1RFOdzHFEeDOs5EC2F3u3Ng?pwd=ex5w) | |CLIP4STR-H | DFN-5B | RBU | 83.0 | 86.4 | 91.7 | [3e942729b1_log](https://huggingface.co/mzhaoshuai/CLIP4STR/blob/main/clip4str_huge_3e942729b1_log.txt) | [3e942729b1](https://huggingface.co/mzhaoshuai/CLIP4STR/blob/main/clip4str_huge_3e942729b1.pt), [BaiduYun](https://pan.baidu.com/s/1duQnOsKZcOF3oiGlsdkBHw?pwd=e2ty) | ## Training - Before training, you should set the path properly. Find the `/PUT/YOUR/PATH/HERE` in `configs`, `scripts`, `strhub/vl_str`, and `strhub/str_adapter`. For example, the `/PUT/YOUR/PATH/HERE` in the `configs/main.yaml`. Then replace it with your own path. A global searching and replacement is recommended. For CLIP4STR with `CLIP-ViT-B`, refer to ``` bash scripts/vl4str_base.sh ``` 8 NVIDIA GPUs with more than 24GB memory (per GPU) are required. For users with limited GPUs, you can change `trainer.gpus=A`, `trainer.accumulate_grad_batches=B`, and `model.batch_size=C` under the condition `A * B * C = 1024` in the bash scripts. Do not modify the code, the `PyTorch Lightning` will handle the left. For CLIP4STR with `CLIP-ViT-L`, refer to ``` bash scripts/vl4str_large.sh ``` We also provide the training script of `CLIP4STR + Adapter` described in the original paper, ``` bash scripts/str_adapter.sh ``` ## Inference ``` bash test.sh {gpu_id} {subpath_of_ckpt} ``` For example, ``` bash scripts/test.sh 0 clip4str_base16x16_d70bde1f2d.ckpt ``` If you want to read characters from an image, try: ``` bash test.sh {gpu_id} {subpath_of_ckpt} {image_folder_path} ``` For example, ``` bash scripts/read.sh 0 clip4str_base16x16_d70bde1f2d.ckpt misc/test_images Output: image_1576.jpeg: Chicken ``` ## Citations ``` @article{zhao2023clip4str, title={Clip4str: A simple baseline for scene text recognition with pre-trained vision-language model}, author={Zhao, Shuai and Quan, Ruijie and Zhu, Linchao and Yang, Yi}, journal={arXiv preprint arXiv:2305.14014}, year={2023} } ``` ## Acknowledgements * [baudm/parseq](https://github.com/baudm/parseq) * [openai/CLIP](https://github.com/openai/CLIP) * [mlfoundations/open_clip](https://github.com/mlfoundations/open_clip) * [huggingface/transformers](https://github.com/huggingface/transformers) * [large-ocr-model/large-ocr-model.github.io](https://github.com/large-ocr-model/large-ocr-model.github.io) * [Mountchicken/Union14M](https://github.com/Mountchicken/Union14M) * [mzhaoshuai/CenterCLIP](https://github.com/mzhaoshuai/CenterCLIP) * [VamosC/CoLearning-meet-StitchUp](https://github.com/VamosC/CoLearning-meet-StitchUp) * [VamosC/CapHuman](https://github.com/VamosC/CapHuman) * Dr. Xiaohan Wang from Stanford University.