Update README.md

README.md

@@ -46,6 +46,7 @@ RDD2020 dataset can be directly used for developing and benchmarking machine lea
 
 ## Dataset Structure
 
+### Data Instance
 The data will follow the structure below:
 ```
 {
@@ -64,6 +65,14 @@ The data will follow the structure below:
 }
 ```
 
+### Data Fields
+“image_id”[string]: ID of the image, created by combining the country plus a sequential number.
+“country”[string]: The country where the photo was taken.
+  "type"[string]: The dataset category the image belongs to, such as 'train', 'test1', or 'test2'. "image"[integer]: The image data converted into PIL format.
+"crack_type"[string]: Types of cracks detected in the image.
+"crack_coordinates"[integer]: Contains crack coordinates as integers.
+
+
 ## Dataset Creation
 
 ### Curation Rationale