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5.6.
3 × 3 filter
Configure each mode with FILTER-MODE. This
executes a matrix operation of 3 × 3 pixels to add
various processing to the image. In Mode 1, you can set
nine filter coefficients within the range of –10.000 to
+10.000 in increments of 0.001.
Mode 2 allows you to set pre-defined filters such as
Laplacian easily.
You can use the RMEM 1 command to call the current
setting value.
Note
When used in conjunction with partial scan mode, noise
may occur in the last line due to the fact that 3 × 3 pixel
data is used for conversion.
Adjust the ending position for partial scan reading, and
use data that does not include noise.
5.6.1.
Mode 1
Use FILTER to specify the parameters for the
coordinates and coefficient of 3 × 3 squares. The
coordinates of the factor are as shown below.
x Setting example
(a) Secondary differentiation (Laplacian) filter
of 8 proximity
This filter detects an edge-a point where the contrast is
changed like the outline of the object in the picture.
Input
12
FILT 11
FILT 21
FILT 12
FILT 22
FILT 13
FILT 23
Output
FILT 31
12
FILT 32
FILT 33
11
21
12
22
13
23
1
1
1
–8
1
1
31
32
33
1
1
1
29
5. DSP Operation
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