title: should I create json annotation for validation images?
body: <p>I am trying to implement mask rcnn for my own dataset but couldnt find any info about annotations for the val folder that contains the images for validattion. I created json annotations using Via 2.0.8 for my training set and that make senese. but if the validation images are the images to test later on why to make annotations for them. I can't train my module without json file in the val folder. </p>
  
  <p>I tried to copy the json annotation for training images to the validation folder. it worker I think but that means I should have the same amount of images in both training and val with same names as well.</p>