Let me show you a cool little feature on Google.
1) Type in images.google.com on your url bar.
2)^This will show up.
3)Click on the little camera (circled above.)
4)^That will show up.
5) Either paste the url of the post of the picture you want or upload it if you have it saved on your computer.
6) You will have all the different options if the original picture!
It seriously takes less than 3 minutes. You can always just type in the name of person thats in the picture on regular google and click the images option images and you’ll get what you’re looking for.