Need High quality of SVG file

[mongkol]

Dear Experters,
Here's the first time to see this forum.I see experters who shows many experiences at here.
I have some questions and need your help.
I need SVG file to use with my CNC plasma table. I try testing free download from commercial url removed and see SVG files with high quality.--> It's OK for CNC plasma table.
I try to convert my picture per attached sample file JPG to SVG file. My SVG file is not smooth and not high quality.
It's difficult to see high quality of SVG file as same as commercial url removed. I don't know how to do good SVG same as this web.
Question,
Is it possible to convert JPG file to be SVG file with high quality?
Remark:I use xara Xtreme5 and inkscape software.(convert raster to vector)

Ton