Selecting one pixel from each blob in a binary image

[Ofnuts]

Can't tell for Gimp3, but for Gimp 2.10 I would do something like this:

• Select by color the white: pdb.gimp_image_select_color()
  
• Obtain a path from the selection pdb.plug_in_sel2path()
  
• This gives you a path where each stroke is an envelope for each identified white blob
  
• You can then use the coordinates of the anchors to compute an approximate centroid and round that value to get the coordinates of a pixel in the blob.