59 62 134 D 3407
D 3407
.
208.01.10
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02 07.2009
105
Sirona Dental Systems GmbH
3
Operation
Operator’s Manual SIDEXIS XG
Analysis tools
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3.7.4.12
Displaying the ruler
Explanation
You have the option of displaying a ruler for X-ray images.
This ruler is divided into millimeters.
Activation and deactivation
➢ In the menu bar
"[V]iew"
/
"[I]mage"
, select the menu item
"Ruler"
.
3.7.5
Image filters
Explanation
SIDEXIS XG offers a powerful and extensive collection of image processing
functions for preparing, interpreting and analyzing image information. The
processing functions discussed below always refer to the active image.
Basics
A few principles and associated terminology must be explained here to help
you to understand the possibilities of image information processing.
The digital data of the X-ray sensor and video camera are processed in the
computer into displayable image information. The smallest information
element is the so-called pixel, derived from the term “picture element”. The
captured image is broken down into individual scanning points or pixels which
are stored in the memory of the computer as numerical code. Each scanning
point (pixel) is assigned a value which corresponds to the gray or color value
of the small image area captured.
Since the image is now available in the computer as a series of clearly defined
numerical values, the image information can be processed by selectively
changing the values. The image processing results are displayed on the
screen as screen pixels or on the print-out as print pixels.
Since a large number of single pixels must be defined individually as
numerical values in each image, image files are very large. Computers with
large RAM (for processing) and large mass memory (for storage) are
necessary to manage these data volumes.
Depending on the nature of the pixel changes and the quantity of pixels to be
changed, image data processing can take a certain amount of time.
3.7.5.1
Brightness and contrast adjustment
Explanation
To better accentuate or delineate image details or to enhance the image
quality it is possible to adjust the brightness and contrast of the display.
Scope
This function can be used for X-ray and video images (but not for live and still
images).
The adjustment function refers to the selected image and can be activated at
any time.
CAUTION
For the above reasons, the number of simultaneously open images should
be limited. A large number of open images reduces the overall system
performance and increases the processing times. Large images have a
stronger impact than small ones. Images which are no longer required
should therefore be closed.
