I'm using the Vision API web detection feature for batch searching images in order to track down exact matches for photo copyright infringements. Upon testing a photo, I see that the results I get from using Google Image Search on images.google.com and looking at "Find Image Source" to get pages with the exact image, differs from the results I'm getting on Vision API. Specifically, there are several results that Google Image search returns that Vision API does not.
The images are encoded as base64 and I've set a max result score to 300 which is more that enough.
How can I get more exact match results from the API that Google Image Search is returning?
Appreciate any insight here!