User manual

Phantom Help File180

4.2.5.2.4 Define an EDR, (Extreme Dynamic Range), Exposure Time

The EDR, (Extreme Dynamic Range), exposure time feature is very useful when the subject contains

very bright areas as well as darker areas and both must be exposed properly throughout the cine file.

The EDR function permits the end-user to expose for darker areas in the subject via the Sample Rate

and Exposure time settings and then set a separate and independent pixel level EDR exposure for all

the portions of the image that might become saturated, (over exposed).

NOTE

The EDR feature is automatically enabled when any value, other than zero, is entered in the

EDR Exposure field, and the EDR feature cannot be used in conjunction with the Auto

Exposure feature and should not be enabled while performing a CSR, (Current Session

Reference), or Black Reference calibration adjustment.

EDR Exposure times should be set at approximately 1/2 of the Exposure Time as a starting

point. By setting the EDR Exposure to 1/2 of the Exposure Time the brightest pixels in the

images will be exposed for one stop less than the darker pixels.

STEP-BY-STEP PROCEDURE

Click the Live Control Panel Tab.

Click on Cine Settings.

Specify the selected Phantom camera's EDR parameter:

Click the down-arrow to the right of the EDR exposure time entry window and select a

predefined EDR exposure time from the pull-down selection list, alternately

Optionally the end-user can enter any number in increments of 1 from the minimum to

maximum value displayed in the list box. These values can be in 1µs increments, or a

percentage of the Exposure Time value.

For details on changing the EDR Unit to µs, or percent, see, Step-by-Step

Procedures>Menubar Procedures>Tool Menu Procedures>Preferences - Phantom Camera

Control Preferences.

RESULT: The Phantom Camera Control application will set the EDR exposure time in the EDR entry

window.