Are Martian Craters concaved or convexed ?

Question

I always thought they were concaved, but when you look at them as convexed, they dont look like craters at all, they look like huge rocks/ meteorites that are protruding from the ground.
I noticed this long ago, but just remembered whilst looking at some pics.

Take a look at this pic on the ESA (European Space Agency) website, make sure you zoom in on it when its downloaded, this ones about 2 meg>
http://esamultimedia.esa.int/images/mars...

Additional Details

Look at the pic and then answer please.

You can see that if they are concaved then the shadows on the rims are wrong.
If they are convexed and protruding from the ground then the shadows are correct.

Please dont answer without seeing the pic.
Im very good at English and dont need an explanation of vocabulary terms such as the meaning of 'concaved' thank you. It just means youve missed the point.

SORRY and THANKS, the link above is incomplete. This is the intended link>
http://esamultimedia.esa.int/images/marsexpress/224co01HellasRem_H.jpg

Dont dismiss it straight away, let your eyes adjust

If its an optical illusion its good, be cause whenever i look now, for a couple of seconds they look concaved but then my eyes focus and its the opposite.
Take a look

Answer 1

they are more than likely concave... hence the word crater....its just the image that makes it look that way I guess...something convex would be a hill or a mountian

Answer 2

when I tried to see the pic,the site wasnt working,and Im gonna answer anyway,if it is a crater,it has to be concave,a crater is an indentation in the ground.

Answer 3

It is most likely that since they were probably created by meteors or other objects striking the planet that they are most likely Concave.

By the way, I did try to look at the picture but is appears that your link is broken or incomplete.