Hi.
Inkscape has a perspective extension to distort paths that way.
With a raster images?
No way, the image itself needs to be distorted too for the effect.
Gimp can do that.
So you may trace the raster part roughly and run the extension.
(On a side note, stroke widths are discarded, they won't be thinner near the vanishing point.)
If it's for a 3D appear, you can use transformation to achieve parallel projected or axonometric look, with raster images.
http://www.inkscapeforum.com/viewtopic.php?f=5&t=16307