Loaded external JPEG's are poor quality

Hi all,

I’m loading external jpg’s dynamically for a website but the images look lower quality than the actual images.

What it looks like:

Actual image:

I’ve set JPEG quality to 100 in the publish settings but it doesn’t help. I’ve searched the forums and Googled but found no luck. Can anyone help me how to show them in their original quality? Thanks.

edit: the images are not being resized or manipulated.