LSM 510
OPERATION IN EXPERT MODE
LSM 510 META
Display and Analysis of Images
Carl Zeiss
03/06
B 45-0021 e
4-301
First / Last
•
Click on the
First
button to calculate the topography surface by using the first slice coming from the
top, where the intensity reaches the value defined by the lower intensity threshold.
This mode provides better result for surfaces of semitransparent materials with inclusions of
higher reflectivity or transparent multilayers with subsurface layers of higher signal intensity.
Extended First / Last Mode
1. Definition of an intensity (I) threshold.
2. Starting from top / bottom of a stack to find I = 400.
3. Search of a local maximum one FWHM of actual Z PSF forwards / backwards.
4. Search of the next local maximum one FWHM forwards / backwards from the last max until you have
not found any new local maximum.
5. Last local maximum is taken as surface point.
Fill Holes procedure
•
Intensity of a missing pixel of a hole has to be interpolated by the distance-weighted intensity of all
surrounding pixels.
•
Fill hole algorithm is optimized for short calculation times.
4.13.24.3 Topography
Thresholds
Intensity
threshold
Click on the
Intensity
button to calculate the topography surface by using the lower and the upper
intensity thresholds for image display. Use of this function is recommended to find the real surface in the
case of images with pronounced noise. All image pixels with intensity less or higher than the thresholds
set are ignored for the surface calculation.
•
Click on the
Intensity
button to select the
intensity thresholds for the surface generation.
The
Intensity Threshold
window appears.
•
Set the lower and upper intensity thresholds
using the appropriate sliders.
•
Click on
Close
to close the
Intensity
Threshold
window.
Fig. 4-289
Intensity Threshold window