Changing an objects colour? (PS/GIMP)

[boycee]

Hi there, it's very easy to change an objects colour to another colour, but how would one go about changing it to black/white. I've been trying to figgure out a way to convert this red rose to a black rose, the best I can come up with is simply a "black and white" looking photo of the rose.

Was wondering if anyone out there could have a go, and possibly share how they did it.

Click for full size


Any ideas?

 

[boycee]

Do you mean to have a black rose (petals) with white shadows dude?. It's impossible to have the black rose and the black background.

Well that's what I was thinking, as like you say the highlights would have to be white surely?

Maybe inverting, then somehow applying the hightlights to a black image, hmm....

Cheers for the efforts guys!