I'm having trouble with imported images in Blender, they don't respond the same way as the native images on Blender do. I save .svg files with Illustrator and it is vector art. I'm just trying to get an embossed look on these images.
I think you will run into problems with such complex paths/curves. Extrude might work but I think beveling wont work well.
For an embossed look I would use the image as a bump map/texture/heigh map:
Add a plane in blender, UV-unwrap it and add your image as a bump map. You should unsharpen your image for a smooth beveling effect.
You could even mix differently smoothed images together for a more distinct look.