update README.md

README.md

@@ -46,6 +46,8 @@ configs:
 
 # NYUv2
 
+This is an **unofficial, preprocessed version** of NYUv2 made available for easier integration with modern ML workflows. The dataset was converted from the original `.mat` format into a split structure with embedded RGB images, depth maps, semantic masks, and instance masks in Hugging Face-compatible format.
+
 ## Dataset Description
 
 - **Homepage:** [NYU Depth Dataset V2](https://cs.nyu.edu/~fergus/datasets/nyu_depth_v2.html)
@@ -82,4 +84,5 @@ If you use this dataset, please cite the original authors:
   title     = {Indoor Segmentation and Support Inference from RGBD Images},
   booktitle = {ECCV},
   year      = {2012}
-}
+}
+```