how to make facebook recognize my webpage images

Question

i developed a website ut when i share any page in facebook

facebook should recognize my page and select images to select a thumbnail

but this do not happen in my website as if facebook can not recognize my page

or cannot read it and select images from it what should i do

to let facebook recognize my page and load all images in the page to navigate left and right to select a thumb for the shared page

Answer 1

Looks like the question has already been answered here. Here is another useful link. Thanks for asking. It made me find out something I can use.

Update: After trying it and finding it not to work I tried the method in this post. It initially didn't work, but that was because I forgot to upload the image. So it may be the case that the original method may still work.