Solving this ai problem

I have any building floor plan
User like to automate the task of plotting
Color & symbol coded light controlling device (rectangular boxes with color & symbol ) on to floor plan wherever needed .
How can this be solved below are possible solution ,suggest the best possible approach .

  1. Using any image processing solution
  2. Obj detection problem is there may be many floor plans needed loads of devices ,quite tedious of generate annotation plus floor plan is just contain edges and boundaries with text label designating what that block is
  3. Gans . I give raw and white image , gan return color coded corrected image of it .
    This is like floor plan generator
    Archigan: generative task for apartment building design posted on nvidia developer blog .