The image requirements for Amazon are:
Drawings and illustrations of the products are not allowed. It must be a professionally lit photograph of the product being sold.
It must not contain confusing additional objects.
The image must be in focus, professionally lit and photographed or scanned, with realistic color, and smooth edges.
Books, Music, and Video/DVD images should be the front cover art, and fill 100% of the image frame. Jewel cases, promotional stickers, and cellophane are not allowed.
All other products should fill 85% or more of the image frame.
The full product must be in frame.
Backgrounds must be pure white (#FFFFFF).
The image must not contain additional text, graphics, or inset images.
Pornographic and offensive materials are not allowed.
Read more about the image requirements of Amazon here.