Question

The original image file that I submit to Vantage has the following size:

After processing in Vantage, in the output JSON file I can see that the image size has been changed:

Why does it happen?

Answer

Vantage may change the size of an image / scale up an image in case it considers it to be required for the best OCR rates possible. It cannot be turned off on a user's side. The technology decides on its own when to do it and when not.