m66256fp Renesas Electronics Corporation., m66256fp Datasheet - Page 12

• Manufacturer Part Number: m66256fp
• Description: 5120 ? 8-bit Line Memory Fifo
• Manufacturer: Renesas Electronics Corporation.

M66256FP
Application Example
Laplacian Filter Circuit for Correction of Resolution in the Secondary Scanning Direction
REJ03F0250-0200 Rev.2.00 Sep 14, 2007
Page 12 of 13
Line (n + 1)
image data
B
Primary scanning
direction
N
A
B
M66256
M66256
D
D
D
D
to
to
1-line
1-line
delay
delay
0
7
0
7
Q
Q
Q
Q
to
to
0
7
0
7
Line (n − 1)
image data
A
Line (n − 1)
Line n
Line (n + 1)
× 2
Line n image data
N
N' = N + K { (N − A) + (N − B) }
= N + K {2N − (A + B)}
K: Laplacian coefficient
× K
Corrected
image data