5
Do you use CPanel with your webhost provider? If you do then you can click on your file manager and then click on your uploads folder to view all your images. The images should have all their permissions written to the right of the names. They should all say 644. If they don't, you can click on the title of the image and see a change permissions link in the menu that pops up on the right top of the page. You can change your permissions that way.