59 62 134 D 3407
D 3407
.
208.01.10
.
02 07.2009
119
Sirona Dental Systems GmbH
3
Operation
Operator’s Manual SIDEXIS XG
Analysis tools
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3.7.5.17
Transfer function
Explanation
SIDEXIS XG Version 1.5 and higher can acquire and process X-ray images
with a 16-bit gray scale depth.
In order to enable their display on screen, these 16-bit X-ray images are
automatically converted to 8-bit gray-scale images.
This is done with a
"Transfer"
function.
This conversion is performed uniformly over the existing gray scale range of
the 16-bit X-ray image.
Using the
"Transfer"
function described here, the conversion of each 16-bit X-
ray image to an 8-bit gray scale image can be influenced individually.
Possibilities
The following possibilities exist:
● Windowing
During windowing, a so-called "window" is selected within the gray scale
spectrum of the X-ray image.
The gray tones contained in the window are then distributed evenly over
the 8-bit gray levels (256 gray tones). All values below the window appear
black. All values above the window appear white.
● Gamma correction
The display of the medium tones can be altered via an adjustable gamma
function.
Scope
This function works only with X-ray exposures.
Activating the function
➢ Click the button.
or
➢ Use the
"[V]iew"
menu bar to select the
"Transfer"
menu item.
Function
The function is explained via an example for operation.
3.7.5.17.1
Operating example
Condition
The display of an X-ray image is to be improved.
Command
1. Activate the X-ray image concerned.
2. Activate the
"Transfer"
function.
NOTICE
Decreasing the size of the window increases the contrast for certain
structures, thus making it possible to selectively display them in sharp
relief.
NOTICE
The display of X-ray images with an 8-bit gray scale depth can also be
usefully influenced with the
"Transfer"
function.
