m66257fp Renesas Electronics Corporation., m66257fp Datasheet - Page 11

• Manufacturer Part Number: m66257fp
• Description: 5120 ? 8-bit ? 2 Line Memory Fifo
• Manufacturer: Renesas Electronics Corporation.

M66257FP
Application Example
Laplacian Filter Circuit for Correction of Resolution in the Secondary Scanning Direction
REJ03F0251-0200 Rev.2.00 Sep 14, 2007
Page 11 of 12
Line (n + 1)
image data
B
Primary scanning
direction
N
A
B
M66257
D
D
to
1-line
2-line
delay
delay
0
7
Q
Q
to
10
17
Q
Q
to
00
07
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