Body: <p>Is it okay if I label my images with their original size and then resize them, or should I first resize them and then label them?</p>
  <p>I mean do I need to recalibrate my labels if I resized my images?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-08-06T11:26:51.043Z
Comments.Text: If resizing does not change the contents of the images, then you probably can first label them and later resize them. However, resizing can actually change the $x$ and $y$ dimensions differently and make certain objects look different (e.g. stretched) and maybe no more really recognizable. I would say that if resizing changes both dimensions by the same amount, then it should be safe to label the images first, but, to be honest, I have never really studied this issue seriously.
Comments.UserDisplayName: nbro
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-08-06T13:28:01.553Z
Comments.Text: @nbro Thanks for the response, I will consider that.
Comments.UserDisplayName: Ali Khalili
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-08-06T14:42:51.880Z
Comments.Text: your labels are related to x,y positions into the image? if yes, you must change the x,y in labels by the same factor you use on resize your photo.
Comments.UserDisplayName: Rogelio Triviño
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-08-06T16:53:13.130Z
Comments.Text: @AliKHalili In my comment above, I assumed you're doing image classification. However, as Rogelio wrote above, it's true that, if you're trying to solve a task like image segmentation (i.e. dense classification), then you'll probably need to change the labels after resizing.
Comments.UserDisplayName: nbro
Tags: <object-detection><object-recognition><data-preprocessing>
Title: Can I resize my images after labeling them?
UserDisplayName: Ali Khalili
ThreadText: # Can I resize my images after labeling them?
  
  (Asked by: username_0 on 2020-08-06)
  
  Is it okay if I label my images with their original size and then resize them, or should I first resize them and then label them?
  
  I mean do I need to recalibrate my labels if I resized my images?
  
  **Tags:** object-detection, object-recognition, data-preprocessing
  
  > **Comments:**
  > **username_1**: If resizing does not change the contents of the images, then you probably can first label them and later resize them. However, resizing can actually change the $x$ and $y$ dimensions differently and make certain objects look different (e.g. stretched) and maybe no more really recognizable. I would say that if resizing changes both dimensions by the same amount, then it should be safe to label the images first, but, to be honest, I have never really studied this issue seriously.  
  > **username_0**: @username_1 Thanks for the response, I will consider that.  
  > **username_2**: your labels are related to x,y positions into the image? if yes, you must change the x,y in labels by the same factor you use on resize your photo.  
  > **username_1**: @AliKHalili In my comment above, I assumed you're doing image classification. However, as username_2 wrote above, it's true that, if you're trying to solve a task like image segmentation (i.e. dense classification), then you'll probably need to change the labels after resizing.  
  
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  ## 0 answers
  
  