Best program for turning 2d image into stl file

I am new to the 3d printing community. I am looking for a program the transfer a 2d image into a high def stl file if there is a program like that or if there is another way of doing it. Also what are the best programs to use.

this is what i use, http://www.imprimindo3d.com.br/software-para-impressao-de-lithophanes/

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