A new system and method for medical image processing using a nonlinear recursive filter are disclosed. The liquid crystal panel 20 has a plurality of optical sensor elements 30 that detect the intensity of received infrared light, and the backlight 10 has an infrared LED 12 that emits infrared light. The secondary path extends between the first and second terminals and through the second switch and a semiconductor switching element. Conductive traces are formed over a substrate with interconnect sites having edges parallel to the conductive trace from a plan view for increasing escape routing density. The concealmentrecovery parameters may be selected from the group consisting of: a signal classification parameter, an energy information parameter and a phase information parameter.