Time Delay Map

Command:

Image Analysis > Special Images > Time Delay Map

The time delay (TD) map is typically used to visualize the thickness of some material, or other physical properties which cause a time shift of pulsed excitation signals. Each pixel of a TD map contains the time shift exhibited at the particular position of the material. The time shift is calculated by measuring the difference in the between a reference point and the intersection of the signal with a user-defined threshold L₁. The reference point can be either zero (see figure below, left) or derived from a second threshold L₂ (right).

How To:

Please follow these steps to create a time delay map: If the dataset contains more than one signal (spectrum), select the appropriate one. Please note that the time delay map can be applied to any kind of signal, not only time signals. Select the type of delay (one level or two levels) The calculated map is displayed in the image at the lower right. The map may either be transfered to the 2D Imager (button ), or to the Image Stack (button );