how can i import an image into a sketch.

basically i have a irregular spline that i need to trace as best as possible.   im makiing a trimming edge for a part that was hand crafted.  I have made a photocopy of the spline and need to insert that image into a sketch to i can draw on top of it.  i have tried every option in the -insert -object dialogue. and none of them are working as desired.  is there any way i can do this.  please help.

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