LEFT TOOL AREA AND HARDWARE CONTROL TOOLS
LSM 710 and LSM 780
Carl Zeiss
Processing Tab
Systems
112 M60-1-0025
e
02/2010
Smooth Filter
The smooth filter is a lowpass filter with Gaussian
characteristic. The gray value of each center pixel is
replaced with the weighted average value of the
surrounding neighbor pixels. The "neighborhood"
is limited by the cut-off in pixels, set by the
Strength
slider. It has an analogous effect as the
kernel size (see Fig. 113). If a dimension is
processed by this tool is set with the tick boxes.
The modified pixel now is the center pixel of the
filter matrix.
Image noise will be reduced by the application of
the lowpass filter. Sharp edges of regions will blur.
Local maxima will be flattened. The dynamic range
will be reduced considerably.
Sharpen Filter
With the sharpen filter, the original image is
filtered with a lowpass filter first. The result of this
filtering is then subtracted from the original image.
This will improve image sharpness.
The tick boxes to choose the dimensions as well as
the
Strength
slider
(see Fig. 114). They are the
same as in the
Smooth Filter
.
Band Filter
With the band filter, the original image is filtered
with a "band blocker" filter. It filters out a certain
frequency band with position
Center
, width
Band
Width
and a steepness of the edges set by
Strength
.
This is particularly useful to remove periodic
perturbances in the image.
HDR offline mode
Two images with different exposures can be
processed with the offline HDR function (see
Section
Frame Mode for LSM
for operation) to
increase the grey dynamics and to improve the
visibility of weak structures.
Fig. 113
Smooth filter settings
Fig. 114
Sharpen filter settings
Fig. 115
Band filter settings
