To maximize display resolution, scene density, and image quality at an affordable cost, the U.S. Army Close Combat Tactical Trainer (CCTT) employs a 15Hz image update rate visual system. When operating at this low image update rate, visual anomalies occur which hinder the training task. Multiple imaging is one of the most serious visual anomalie observed in a low update rate visual system. Multiple imaging negatively affects image resolution, and can cause loss of situation awareness, and in some cases, simulator sickness. A technique, called Multiple Image Suppression (MIS), is used in the Commander's Popped Hatch (CPH) panoramic display in the CCTT visual system to significantly reduce the negative effects of multiple imaging.

This paper introduces the reader to the artifacts of multiple imaging that result from an image update rate that is less than the display refresh rate. It describes the side effects that can occur as a result of using Multiple Image Suppression. It describes the Multiple Image Suppression technique as implemented in the image generator and used on the Commander's Popped Hatch panoramic display of the M1A1, M1A2, and M2A2/M3A2 manned modules on the CCTT program. This paper explores the cost and performance benefits of Multiple Image Suppression. And finally, the paper examines expanded uses of the Multiple Image Suppression technique.