1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>5.2. Edge</title>
<link rel="stylesheet" href="gimp-help-plain.css" type="text/css" />
<link rel="stylesheet" href="gimp-help-screen.css" type="text/css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1" />
<link rel="start" href="index.html" title=" " />
<link rel="up" href="ch06s05.html" title="5. Edge-detect filters" />
<link rel="prev" href="ch06s05.html" title="5. Edge-detect filters" />
<link rel="next" href="ch06s05s03.html" title="5.3. Difference of Gaussians" />
</head>
<body>
<div xmlns="" class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center" id="chaptername">5.2. Edge</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="ch06s05.html">Prev</a> </td>
<th width="60%" align="center" id="sectionname">5.2. Edge</th>
<td width="20%" align="right"> <a accesskey="n" href="ch06s05s03.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="plug-in-edge"></a>5.2. Edge</h3>
</div>
</div>
</div>
<a id="id3361495" class="indexterm"></a>
<div class="mediaobject">
<img src="../images/filters/filters-edgedetect-edge.png" />
</div>
<div class="simplesect" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="id3361519"></a>Overview</h4>
</div>
</div>
</div>
<p>
This filter is found in
<span class="guimenuitem">Image>/Filters/Edge-Detect/<span class="accel">E</span>dge</span>
</p>
</div>
<div class="simplesect" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="id3361757"></a>Options</h4>
</div>
</div>
</div>
<div class="variablelist">
<dl>
<dt>
<span class="term">Algorithm</span>
</dt>
<dd>
<p>
Edge detector offers several detection methods:
</p>
<p>
</p>
<div class="itemizedlist">
<ul type="disc">
<li>
<p>
<span class="guilabel">Sobel</span>: Here, this method has no options and so is less
interesting than the specific Sobel.
</p>
</li>
<li>
<p>
<span class="guilabel">Prewitt</span>: Result doesn't look different from Sobel.
</p>
</li>
<li>
<p>
<span class="guilabel">Gradient</span>: Edges are thiner, less contrasted and more
blurred than Sobel.
</p>
</li>
<li>
<p>
<span class="guilabel">Roberts</span>: No evident difference from Sobel.
</p>
</li>
<li>
<p>
<span class="guilabel">Differential</span>: Edges less bright.
</p>
</li>
<li>
<p>
<span class="guilabel">Laplace</span>: Less interesting than the specific one.
</p>
</li>
</ul>
</div>
<p>
</p>
</dd>
<dt>
<span class="term">Parameter Settings</span>
</dt>
<dd>
<p>
<span class="guilabel">Amount</span>:
a low value results in black, high-contrasted image with thin edges. A high value
results in thick edges with low contrast and many colors in dark areas.
</p>
<p>
<span class="guilabel">Wrap, Smear, Black</span>:
is the Wrapmode like "Displace" plug-in. It's useful for tilable image.
</p>
</dd>
</dl>
</div>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="ch06s05.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="ch06s05.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="ch06s05s03.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">5. Edge-detect filters </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> 5.3. Difference of Gaussians</td>
</tr>
</table>
</div>
</body>
</html>
|
