Data Annotation

• Bounding box of ImageNet images

 Annotation file format: 
 Img_W Img_H xmin xmax ymin ymax

• Problems of Current Approach

1. some images are too large
2. the "null" string in result should be replaced by -1 -1 -1 -1
3. the following plot is that, if each image has a certain number of annotations (x axis), how many images can be inferred a true bounding box.

By the plot, we suggest using 6 annotations for each image to label.