Strech and flatten a picture

[lechiffre]

Hi everyone.Newbie here .

I need a bit of help with the picture below


I don't know exactly how to explain this but I would like to flatten this image.Basically the rounded edges have to fill each corner of a square . I was taught how to do this a while back but I have absolutely no idea how to this now.
Please help me out.

Regards

 

[sprucemagoo1]

If you meant like this, you can go Edit/Puppet Warp.

 

[lechiffre]

If you meant like this, you can go Edit/Puppet Warp.

Thank you Chad. I'm thinking its probably the puippet warp tool but you just cropped the image and it still has the rounded shape of the chinese funeral urn.

 

[sprucemagoo1]

I only rushed what I did to show what the tool did to make sure this was what you were after. If you want it to look good, you will have to do it yourself, as there is only you who knows how you want it to look.

 

[Paul]

Filter distort spherize.

 

[lechiffre]

Filter distort spherize.
View attachment 21468

Aye! Paul thank you. It works. Superb.