LSM 710 and LSM 780
LEFT TOOL AREA AND HARDWARE CONTROL TOOLS
Systems
Acquisition Tab
Carl Zeiss
02/2010 M60-1-0025
e
71
As a result of the HDR process, the grey scale is independent from the initial bit depth, but covers a range
from 0-1.
Also, the grey stepping is much finer, with much better visibility of weak structures (Fig. 61).
Fig. 61
HDR image display
The
Sampling
mode is a means to improve the image display as it evens out the differences between the
very high and the very low intensities in the image. However, it is not suitable for quantitative analysis as
the grey level steps become non-linear.
The image re-calculation works already with a single image (
Frame
= 1) and is done in the following way
taking
Intensity
3.
1.
Image x 1; cut off of grey levels above the dynamic range; Result divided by 1
2.
Image x 2; cut off of grey levels above the dynamic range; Result divided by 2
3.
Image x 3; cut off of grey levels above the dynamic range; Result divided by 3
The three resulting images are summed up and again divided by 3.
This procedure is adapted accordingly if a higher
Intensity
number is set.
If two images are
acquired
(
Frame
= 2) and Intensity is still at 3, the second image is rated lower and is
multiplied and divided in three steps with the value 4,5 and 6; The then 6 resulting images are summed
up and divided by 3.
The image acquisition parameters are not changed for the acquisition of the two (or more)
Frames
.
