DDE is basically a filter designed to enhance the high spatial frequencies (edges etc.) and appears as boosted lens modulation transfer function, or MTF. The DDE filter attenuates high amplitude signals, making more of the total dynamic range available to display faint objects and details. The amount of attenuation is automatically determined by analyzing scene statistics.
Enabling, disabling, and adjusting DDE in FLIR OEM products such as Tau2 and Quark2 cameras can be accomplished by the user via the Camera Control GUI, or by serial command to the camera. Experimentation may be necessary to see if or how much DDE is beneficial to a particular application.