Update README.md

README.md

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-license: mit
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+---
+license: mit
+task_categories:
+- text-to-image
+tags:
+- layout-to-image
+---
 # nuScenes-time-weather-GeoDiffusion Dataset Card
 
-nuImages-GeoDiffusion is the official dataset annotation file used to train [GeoDiffusion](https://arxiv.org/abs/2306.04607) on the nuImages dataset. We follow the implementations of [mmdetection3d](https://github.com/open-mmlab/mmdetection3d/blob/main/configs/nuimages/README.md/#introduction), while saving the annotation results in standard COCO format. Check detailed usage in our [Github repo](https://github.com/KaiChen1998/GeoDiffusion).
+nuScenes-time-weather-GeoDiffusion is the official dataset annotation file used to train [GeoDiffusion](https://arxiv.org/abs/2306.04607) on the nuScenes dataset with time of day (i.e., daytime/night) and weather (i.e., sunny/rain).
+Since the nuImages dataset does not equip with those meta tags, we opt for the nuScenes dataset and generate the 2D bounding box annotations via inference with a [Mask R-CNN](https://github.com/open-mmlab/mmdetection3d/tree/main/configs/nuimages#instance-segmentation) pre-trained on the nuImages dataset, which is then saved in the standard COCO format. 
+Check detailed usage in our [Github repo](https://github.com/KaiChen1998/GeoDiffusion).