title: YOLOv4 annotations saves dimensions in a [0,1] float
body: <p>This is from an annotations file for an image:</p>
  <pre><code>0 0.6142131979695431 0.336 0.467005076142132 0.392
  </code></pre>
  <p>The first zero is the class label. <code>0.6142131979695431</code> and <code>0.336</code> are the xy coordinates of the bounding box. <code>0.467005076142132</code> and <code>0.392</code> are the width and the height of the bounding box. However, what I don't get is why the x, y, width and height are in a [0,1] float. Someone told me that its a percentage but a percentage relative to what?</p>
  <p>For example. I am writing software that builds a synthetic dataset. This is one training image I produced. It has the bounding boxes around the objects I want to detect.</p>
  <p><a href="https://i.stack.imgur.com/aeGrd.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/aeGrd.jpg" alt="enter image description here" /></a></p>
  <p>The bounding boxes wrap the Wizards and Ubuntu logos perfectly. So how can I annotate them like the format above?</p>