I bought a copy of Roy Lichtenstein (Benedikt Taschen, 1988) from a BOOKSALE outlet a few weeks ago. In a chapter titled “A Closer Look at Benday Dots,” I saw for the first time an image of Lichtenstein’s painting Magnifying glass (1963). (The image below is from IMAGE DUPLICATOR.) I laughed out loud when I first saw it. It is only now that I understand what is so funny about it.
The Ben Day dots are intended to indicate that the region has a color that is a combination of the color of the dots and the color of the background. In this case, the intent is to tell the reader that the region with the dots is colored gray (black dots, white background). If a region is magnified, the image that results would still be the same color as the original. (See the edited image below left.) So, the “correct” way to represent the situation is as shown below right, with no change in the Ben Day dots of the original image and the magnified image.
With Ben Day dots, it is understood that there aren’t actually any black dots. Lichtenstein’s painting is funny because it confuses a model of a reality (a gray plane) with a model of a different reality (a plane with dots).