Contrast polarity and orientation
(In collaboration with Andrei Gorea)
In both panels the text is: "ONE AIM". To see the hidden text better, use a transparent red or green filter.
The color image was exhibited in the New York Arts Biennial 1997, Eighth Floor Gallery, New York City , N.Y., October 14-25, 1997, under the title "Now you see it, now you don't; or don't you?" The exhibit, under the title "Thresholds: Limits of Perception", featured works by artists and scientists.
Letters "O" and "E" are formed by orientation. Letters "A" & "M" are formed by color. Letters "N" & "I" are formed by color and orientation.