The term "cameo" gets bandied around quite a lot without, as far as I know, an unambiguous description. It is certainly dangerous to draw conclusions from photographs as to whether a coin is cameo or not. It appears to me that the method of photography and lighting etc can make huge differences to the appearance of a coin.
For example, I own 2 1948 proof pennies and the photographs that I took with my digital SLR, macro lens and built-in flash make them look like cameos and yet when I hold them in hand they are clearly not. Terry Eagleton sent me a 1953 proof penny which looks like a cameo in hand but my photographs of it do not !
I'm assuming that a true cameo appears to have a darkish background with a lighter "frosted" raised image ?
My photo on left
This the original Heritage photo which is more as it appears in hand.
The basic message, as always, is to be wary of photographs and judge it in your hand wherever possible !