Which commandment does the making of the images violate?
Judges 17:4 (ESV)
4So when he restored the money to his mother, his mother took 200 pieces of silver and gave it to the silversmith, who made it into a carved image and a metal image. And it was in the house of Micah.
The production of the the carved image and metal image violates the second commandment (see Exodus 20:4, Exodus 20:23; Exodus 34:17; Leviticus 19:4).
4 So when he restored the money to his mother, his mother took 200 pieces of silver and gave it to the silversmith, who made it into a carved image and a metal image. And it was in the house of Micah.