Siemens SIMATIC MV500 Operating Manual page 42

Application
5.1 Program
Parameter Possible values
Improve image
On
•
Off
•
42
Default Description
Off By enabling this function, you activate additional
image enhancement methods. Enabling this leads to
increased decoding time.
MED:3:3;
•
Median filtering, suppresses image noise.
NRM;
•
Histogram normalization, improves reading of
text with poor contrast. Performs normalization of
the gray values. This function requires no pa-
rameters.
EQU;
•
Histogram equalization, improves reading of text
with very poor contrast. Performs an equal distri-
bution of the gray values. If the images have a
good contrast, this can lead to unwanted intensi-
fication of image noise. This function requires no
parameters.
ERO:X:Y;
•
Refers to the dark image components.
Reduces the dot width (signal erosion of X pixels
in the x-direction and Y pixels in the y-direction).
DIL:X:Y;
•
Refers to the dark image components.
Increases the dot width and connects printing
dots, e.g., for inkjet (signal dilation of X pixels in
the x-direction and Y pixels in the y-direction).
X, Y, 1 to 7 in each case, whereby at least one of
the two must be > 1.
SOB:X:Y;
•
Sobel operator, finds and intensifies edges (large
changes in brightness). The following combina-
tions are possible for the X:Y values: 1:3 (only
vertical edges), 3:1 (only horizontal edges), and
3:3 (all edges).
MAV:X:Y
•
MAV ≙ Moving Average; moving average. Sup-
presses image noise. The intensity of the effect
can be varied using parameters X and Y. The
value range for X and Y is 1 to 7 pixels in each
case. The filter calculates a moving average of
the pixel values in a rectangular window. The
width and height of the window are specified by
parameters X and Y.
You can specify the image filters in any order and
also specify several of them in succession.
Operating Manual, 05/2019, C79000-G8976-C495-02
SIMATIC MV500