[Cyan]<CedarChest6.1>Documentation>ConvolutionFilterDoc.tioga!1

ConvolutionFilterDoc.tioga

Tim Diebert: May 21, 1986 8:15:44 am PDT

Convolution Filter

CEDAR 6.1 — FOR INTERNAL XEROX USE ONLY

Convolution Filter

Tim Diebert

Abstract: Package that performs NxM convolution filtering on an AIS image.

Created by: Tim Diebert

Maintained by: Tim Diebert <Diebert.pa>

Keywords: AIS, convolution, filter

XEROX Xerox Corporation
Palo Alto Research Center
3333 Coyote Hill Road
Palo Alto, California 94304

For Internal Xerox Use Only

1. Executive commands

ConvolutionFilter output ← input filterspec

A filterspec is stored in a text file called Filter.txt. The filter format of this plain text file is:

Sharp3: 3 by 3

-1 0 -1

0 4 0

-1 0 -1

Any size filter can be specified as well as any number in the matrix. The default filters are attached.

Filter.txt

Tim Diebert: July 30, 1985 9:01:10 am PDT

[FILTER]
First: 3 by 4
1 2 3
4 5 6
7 8 9
10 11 12

Sharp3: 3 by 3
-1 0 -1
0 4 0
-1 0 -1

Edge30: 3 by 3
-1 0 -1
0 4 0
-1 0 -1

Edge31: 3 by 3
-1 0 -1
0 5 0
-1 0 -1

Edge32: 3 by 3
-1 0 -1
0 6 0
-1 0 -1
Edge33: 3 by 3
-1 0 -1
0 7 0
-1 0 -1

Edge231: 3 by 3
-2 0 -2
0 10 0
-2 0 -2

ARYDI77: 7 by 7
-1 0 0 0 0 0 -1
0 -1 0 0 0 -1 0
0 0 -1 0 -1 0 0
0 0 0 12 0 0 0
0 0 -1 0 -1 0 0
0 -1 0 0 0 -1 0
-1 0 0 0 0 0 -1

ANNULUS77: 7 by 7
2 2 2 2 2 2 2
2 0 0 0 0 0 2
2 0 0 0 0 0 2
2 0 0 -48 0 0 2
2 0 0 0 0 0 2
2 0 0 0 0 0 2
2 2 2 2 2 2 2

ANNULUS77P: 7 by 7
-2 -2 -2 -2 -2 -2 -2
-2 0 0 0 0 0 -2
-2 0 0 0 0 0 -2
-2 0 0 48 0 0 -2
-2 0 0 0 0 0 -2
-2 0 0 0 0 0 -2
-2 -2 -2 -2 -2 -2 -2

Sharp: 5 by 5
-1 -1 -1 -1 -1
-1 0 0 0 -1
-1 0 17 0 -1
-1 0 0 0 -1
-1 -1 -1 -1 -1

Sharper: 7 by 7
-1 -1 -1 -1 -1 -1 -1
-1 0 0 0 0 0 -1
-1 0 0 0 0 0 -1
-1 0 0 24 0 0 -1
-1 0 0 0 0 0 -1
-1 0 0 0 0 0 -1
-1 -1 -1 -1 -1 -1 -1

Blur: 3 by 3
1 1 1
1 1 1
1 1 1