Sony XCL-U100, Technical Manual

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5. DSP Operation
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(b) Image sharpening filter
Parts where the density varies such as edges are
emphasized by subtracting the secondary differentiation
from the target image. The following filter multiplies the
Laplacian filter of 8 proximity by a weighting
coefficient of 0.111, and then subtracts the value from
the original image, so the edges are emphasized while
controlling the sharpness level.
5.6.2. Mode 2
Six patterns have been provided.
–0.111 –0.111 –0.111
–0.111 1.888 –0.111
–0.111 –0.111 –0.111
Filter type
Effect Factor
1 Laplacian filter of 8 proximity
Detects edges. 1 1 1
1 –8 1
1 1 1
2 Laplacian filter of 4 proximity
Detects edges. 0 1 0
1 –4 1
0 1 0
3 Moving average filter
Blurs the image. 0.111 0.111 0.111
0.111 0.111 0.111
0.111 0.111 0.111
4 Weighted average filter
Blurs the image. 0.062 0.125 0.062
0.125 0.250 0.125
0.062 0.125 0.062
5 r direction edge detection filter
Detects top/bottom LowToHi pixels.
–1 –1 –1
0 0 0
1 1 1
6
t
direction edge detection filter
Detects left/right LowToHi pixels.
–1 0 1
–1 0 1
–1 0 1