| | --- |
| | license: cc-by-4.0 |
| | language: |
| | - am |
| | - hy |
| | - zh |
| | - ka |
| | - ja |
| | - km |
| | - lo |
| | - my |
| | - te |
| | - ta |
| | - ml |
| | - he |
| | - hi |
| | - ko |
| | - kn |
| | - or |
| | - bn |
| | - el |
| | - gu |
| | - la |
| | - ru |
| | - si |
| | - th |
| | - uk |
| | - ar |
| | - bo |
| | size_categories: |
| | - 100K<n<1M |
| | tags: |
| | - Cherokee |
| | - Hanunoo |
| | - Kaithi |
| | - Lisu |
| | - Miao |
| | - Osage |
| | - Sharada |
| | - Siddham |
| | - Soyombo |
| | - TaiTham |
| | - TaiViet |
| | - Takri |
| | - Thaana |
| | - Tirhuta |
| | - Tifinagh |
| | - soyombo |
| | - siddham |
| | - sharada |
| | - osage |
| | - miao |
| | - lisu |
| | - kaithi |
| | - Ethiopian |
| | - Adlam |
| | --- |
| | |
| |
|
| | # 🌍 Tiny Multilingual CAPTCHA Library |
| |
|
| | **Repository:** `remiai3/tiny-captcha-library` |
| | A multilingual dataset of **synthetic 4-character CAPTCHA images** designed for **OCR, multilingual vision models, and script recognition research**. |
| | This dataset spans **44 world writing systems** and is especially useful for **low-resource script OCR training**. |
| |
|
| | ## 📌 Dataset Summary |
| |
|
| | Each script includes **10,000 unique CAPTCHA images**. |
| | The dataset is provided in **two parallel formats**: |
| |
|
| | - **CSV version** (standard ML workflows) |
| | - **Parquet version** (faster loading for large-scale pipelines) |
| |
|
| | ⚠️ The images inside both folders are **identical** — only the label file format differs. |
| | So per language: |
| | - 10,000 unique images |
| | - 10,000 duplicate copies (same images, different label format) |
| |
|
| | ## 🗂 Dataset Structure |
| |
|
| | tiny-captcha-library/ |
| | │ |
| | ├── 4char/ |
| | │ ├── <Language_Name>/ |
| | │ │ ├── images.zip |
| | │ │ └── labels.csv |
| | │ └── ... |
| | │ |
| | ├── 4char_parquet/ |
| | │ ├── <Language_Name>/ |
| | │ │ ├── images.zip |
| | │ │ └── labels.parquet |
| | │ └── ... |
| | │ |
| | ├── Amharic.png |
| | ├── Armenian.png |
| | └── ... |
| | |
| | ### Folder Details |
| | | Folder | Contains | Purpose | |
| | |-------|----------|---------| |
| | | **4char/** | Images + `labels.csv` | Standard format | |
| | | **4char_parquet/** | Same images + `labels.parquet` | Efficient ML pipelines | |
| | Each language folder includes: |
| | - `images.zip` → CAPTCHA images |
| | - Label file mapping image filename → correct 4-character text |
| | |
| | ## 🌐 Supported Scripts |
| | Amharic, Armenian, Arabic, Bengali, Cherokee, Chinese, Georgian, Greek, Gujarati, Hebrew, Hindi, Hanunoo, Japanese, Kaithi, |
| | Kannada, Khmer, Lao, Latin, Lisu, Malayalam, Miao, Modi, Myanmar, Odia, Osage, Russian, Sharada, Siddham, Sinhala, Soyombo, |
| | Tai Tham, Tai Viet, Takri, Thaana, Tirhuta, Tamil, Telugu, Thai, Ukrainian, Tifinagh, Korean, Tibetan, Ethiopian, Adlam |
| | |
| | ## 🖼 Sample CAPTCHA Styles |
| | |
| | <table align="center"> |
| | <tr> |
| | <td align="center"><img src="./Amharic.png" width="110"/><br>Amharic</td> |
| | <td align="center"><img src="./Arabic.png" width="110"/><br>Arabic</td> |
| | <td align="center"><img src="./Armenian.png" width="110"/><br>Armenian</td> |
| | <td align="center"><img src="./Bengali.png" width="110"/><br>Bengali</td> |
| | <td align="center"><img src="./Cherokee.png" width="110"/><br>Cherokee</td> |
| | <td align="center"><img src="./Chinese.png" width="110"/><br>Chinese</td> |
| | </tr> |
| | |
| | <tr> |
| | <td align="center"><img src="./Georgian.png" width="110"/><br>Georgian</td> |
| | <td align="center"><img src="./Greek.png" width="110"/><br>Greek</td> |
| | <td align="center"><img src="./Gujarati.png" width="110"/><br>Gujarati</td> |
| | <td align="center"><img src="./Hanunoo.png" width="110"/><br>Hanunoo</td> |
| | <td align="center"><img src="./Hebrew.png" width="110"/><br>Hebrew</td> |
| | <td align="center"><img src="./Hindi.png" width="110"/><br>Hindi</td> |
| | </tr> |
| | |
| | <tr> |
| | <td align="center"><img src="./Japanese.png" width="110"/><br>Japanese</td> |
| | <td align="center"><img src="./Kaithi.png" width="110"/><br>Kaithi</td> |
| | <td align="center"><img src="./Kannada.png" width="110"/><br>Kannada</td> |
| | <td align="center"><img src="./Khmer.png" width="110"/><br>Khmer</td> |
| | <td align="center"><img src="./Lao.png" width="110"/><br>Lao</td> |
| | <td align="center"><img src="./Latin.png" width="110"/><br>Latin</td> |
| | </tr> |
| | |
| | <tr> |
| | <td align="center"><img src="./Lisu.png" width="110"/><br>Lisu</td> |
| | <td align="center"><img src="./Malayalam.png" width="110"/><br>Malayalam</td> |
| | <td align="center"><img src="./Miao.png" width="110"/><br>Miao</td> |
| | <td align="center"><img src="./Modi.png" width="110"/><br>Modi</td> |
| | <td align="center"><img src="./Myanmar.png" width="110"/><br>Myanmar</td> |
| | <td align="center"><img src="./Odia.png" width="110"/><br>Odia</td> |
| | </tr> |
| | |
| | <tr> |
| | <td align="center"><img src="./Osage.png" width="110"/><br>Osage</td> |
| | <td align="center"><img src="./Russian.png" width="110"/><br>Russian</td> |
| | <td align="center"><img src="./Sharada.png" width="110"/><br>Sharada</td> |
| | <td align="center"><img src="./Siddham.png" width="110"/><br>Siddham</td> |
| | <td align="center"><img src="./Sinhala.png" width="110"/><br>Sinhala</td> |
| | <td align="center"><img src="./Soyombo.png" width="110"/><br>Soyombo</td> |
| | </tr> |
| | |
| | <tr> |
| | <td align="center"><img src="./TaiTham.png" width="110"/><br>Tai Tham</td> |
| | <td align="center"><img src="./TaiViet.png" width="110"/><br>Tai Viet</td> |
| | <td align="center"><img src="./Takri.png" width="110"/><br>Takri</td> |
| | <td align="center"><img src="./Tamil.png" width="110"/><br>Tamil</td> |
| | <td align="center"><img src="./Telugu.png" width="110"/><br>Telugu</td> |
| | <td align="center"><img src="./Thaana.png" width="110"/><br>Thaana</td> |
| | </tr> |
| | |
| | <tr> |
| | <td align="center"><img src="./Thai.png" width="110"/><br>Thai</td> |
| | <td align="center"><img src="./Tirhuta.png" width="110"/><br>Tirhuta</td> |
| | <td align="center"><img src="./Ukrainian.png" width="110"/><br>Ukrainian</td> |
| | <td align="center"><img src="./Tifinagh.png" width="110"/><br>Tifinagh</td> |
| | <td align="center"><img src="./Korean.png" width="110"/><br>Korean</td> |
| | <td align="center"><img src="./Tibetan.png" width="110"/><br>Tibetan</td> |
| | </tr> |
| | <tr> |
| | <td align="center"><img src="./Ethiopian.png" width="110"/><br>Ethiopian</td> |
| | <td align="center"><img src="./Adlam.png" width="110"/><br>Adlam</td> |
| | <td></td> |
| | <td></td> |
| | <td></td> |
| | <td></td> |
| | </tr> |
| | </table> |
| | |
| | ## 🏷 Label Format |
| | ### CSV |
| | | filename | label | |
| | |----------|-------| |
| | | img_00001.png | text | |
| | | img_00002.png | text | |
| | |
| | ### Parquet |
| | Same structure as CSV but stored in columnar format. |
| | |
| | ## 📊 Dataset Statistics |
| | | Metric | Value | |
| | |-------|------| |
| | | Total Scripts | 44 | |
| | | Unique Images per Script | 10,000 | |
| | | Total Unique Images | 440,000 | |
| | | Images Including Duplicates | 880,000 | |
| | | Characters per CAPTCHA | 4 | |
| | |
| | ## 🎯 Intended Use |
| | This dataset is designed for: |
| | - Multilingual OCR training |
| | - Vision-language model pretraining |
| | - Script recognition research |
| | - Robust text recognition under distortion |
| | 🚫 Not intended for bypassing real-world CAPTCHA security systems. |
| | |
| | ## ⚙️ Example Loading |
| | |
| | ```python |
| | import pandas as pd |
| | |
| | df = pd.read_csv("labels.csv") |
| | print(df.head()) |
