Update README.md

README.md

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-license: cc-by-nc-4.0
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+---
+license: cc-by-nc-4.0
+---
+# Koreatech-CGH 
+
+This dataset consists of RGBD–complex hologram pairs designed for training machine learning–based computer-generated holography (ML-CGH) models.  
+It can be used for tasks such as hologram generation, hologram upscaling, and related applications.  
+
+The holograms were generated using a layer-based hologram generation method[[arxiv]()].  
+
+Note that this dataset is licensed under the **Creative Commons Attribution 4.0 International License Non Commercial (CC BY-NC 4.0)**.
+
+---
+## Data Details
+
+### Directory structure
+```
+root
+  ├─test
+  │  ├─amp
+  │     └─*.exr
+  │  ├─depth
+  │  ├─img
+  │  └─phs
+  ├─train
+  │  ├─amp
+  │  ├─depth
+  │  ├─img
+  │  └─phs
+  └─validation
+      ├─amp
+      ├─depth
+      ├─img
+      └─phs
+```
+
+
+### Dataset Configuration
+|           | Format | Channels | Resolution | Precision | Range                   |
+|-----------|--------|----------|------------|-----------|-------------------------|
+| RGB       | .exr   | 3        | 256 × 256    | fp32      | 0-1                     |
+| Depth     | .exr   | 1        | 256 × 256    | fp32      | 0-1                     |
+| Amplitude | .exr   | 3        | 256 × 256    | fp32      | dependent to data |
+| Phase     | .exr   | 3        | 256 × 256    | fp32      | 0-1                     |
+
+### Hologram Parameters
+
+| Parameter                  | Value                                   |
+|-----------------------------|-----------------------------------------|
+| Resolution                  | 256 × 256                              |
+| Pixel Pitch                 | 3.6 μm                                 |
+| Wavelength (R,G,B)          | 638 nm, 532 nm, 450 nm                  |
+| Physical Extent (H × W × D) | 921.6 mm × 921.6 mm × 10.16681 mm     |
+
+
+### Data Splits  
+| Split       | Number of Samples |
+|-------------|-------------------|
+| Train       | 5,000             |
+| Validation  | 500             |
+| Test        | 500             |
+
+
+
+---
+### Source 3D Models
+The RGB-D scenes were generated from 3D meshes obtained from the [Google Scanned Objects](https://research.google/blog/scanned-objects-by-google-research-a-dataset-of-3d-scanned-common-household-items/
+).  
+
+---
+# License
+© 2025, SPIN Lab, Korea University of Technology and Education (KOREATECH) and Digital Holography Research Group, Electronics and Telecommunications Research Institute (ETRI)  
+This dataset is licensed under the **Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)** license.  
+You are free to use, modify, and distribute this work **for non-commercial purposes**, with proper attribution.  
+**Commercial use is strictly prohibited.**
+
+See [LICENSE](./LICENSE.txt) and the [official CC BY-NC 4.0 license](https://creativecommons.org/licenses/by-nc/4.0/) for full terms.
+
+For inquiries, please contact the corresponding author: **bluekdct@gmail.com**
+
+
+---
+
+## Acknowledgements
+
+
+---