Photo Techniques: Macro Images & Image Post Processing.
A macro image of President Grant converted to false colors using a Nik Color Efex Pro 3 “Infrared Thermal Image” filter. Notice the “The United States of America” micro-print.

David's Images of the Day Photoblog
A macro image of President Grant converted to false colors using a Nik Color Efex Pro 3 “Infrared Thermal Image” filter. Notice the “The United States of America” micro-print.