First, we’ll transform a photo into a series of circles. This is done by combining several filters.
Open an image to edit.
Duplicate the layer (Layer> Duplicate Layer or Ctrl+J).
Select the new layer and apply a Mosaic filter (Filter> Pixelate> Mosaic) with a Cell Size of 8 square.
Apply a Find Edges filter (Filter> Stylize> Find Edges).
Apply a Median filter (Filter> Noise> Median) with a Radius of 2 pixels.
To reduce the size of the dots, we’ll use the Maximum filter (Filter> Other> Maximum) to enlarge the white areas. Use a Radius of 1 pixel.
Now we’ll create the outline of the circles. This layer will also be reused to create the star effect in the next page.
Duplicate the top layer (Layer> Duplicate Layer or Ctrl+J) and change the blending mode to Screen.