Image URLs are the direct links to the images displayed on your product pages. They are different than the product link.
You can easily retrieve the image URLs by right clicking the images in your product page, and selecting "Open image in new tab" in the browser. This will give you the direct link to each image.
For example - Biocompare's homepage - has the logo on the top left. Following the above steps, points here - which is the direct link to this logo.
Image URLs and product links will be maintained separately in your database. Please reach out to your internal Database manager and check if they are able to retrieve this information.