to the “Effects” tab, and enter 15 for the amount, 20 for size and 80 for
roughness. You could also apply a “Vignette.” Here I used -30 for the
amount, 40 for the midpoint and -35 for roundness.
It’s almost like an infrared image.
Levels
When applying a “Levels adjustment,” you can set black and white points in
order to decrease color tints, but where are the darkest and brightest spots
in the image? Go to New Adjustment Layer → Threshold to find those areas.
This function is available under the “Layer” menu.