how do i get a silhouette with PS

[wainism]

hi,wanna ask u gurus out there abt how do i go abt getting a silhouette from a photo.
meaning,lets say i have a photo of a person,but i wanna get a silhouette for a poster.any ideas?
i tried to lasso the shape out,stroke and fill with balck.but the edges turn out blurry.pls help!!!
i m using CS

 

[sinlg]

hi,wanna ask u gurus out there abt how do i go abt getting a silhouette from a photo.
meaning,lets say i have a photo of a person,but i wanna get a silhouette for a poster.any ideas?
i tried to lasso the shape out,stroke and fill with balck.but the edges turn out blurry.pls help!!!
i m using CS

How about create an adjustment layer, and dodge the person out.. make the person darker?