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YOLO Dataset Format (Image Classification)

Image Classification​

Each image must have a corresponding label file. Expected folder structure:

datasets/
 human_face/        ← one folder per class
  image1.jpg
  image2.jpg
  labels/           ← YOLO .txt annotation files
   image1.txt
   image2.txt
  classes.txt       ← class names for this folder

Label file format — one line per bounding box:

<class_id> <x_center> <y_center> <width> <height>
  • All coordinate values normalised between 0.0 and 1.0
  • class_id is zero-based, matching your classes.txt file
NOTE

If a label file is missing for an image, the tool treats that image as unannotated. Use the Dataset Health tab to find and manage unannotated images before training.