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
|
<?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>4.3. Noisify</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="ch06s04.html" title="4. Noise filters" />
<link rel="prev" href="ch06s04s02.html" title="4.2. Hurl" />
<link rel="next" href="ch06s04s04.html" title="4.4. Pick" />
</head>
<body>
<div xmlns="" class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center" id="chaptername">4.3. Noisify</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="ch06s04s02.html">Prev</a> </td>
<th width="60%" align="center" id="sectionname">4.3. Noisify</th>
<td width="20%" align="right"> <a accesskey="n" href="ch06s04s04.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-noisify"></a>4.3. Noisify</h3>
</div>
</div>
</div>
<a id="id3360347" class="indexterm"></a>
<div class="mediaobject">
<img src="../images/filters/filters-noise-noisify.png" />
</div>
<div class="simplesect" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="id3360783"></a>Overview</h4>
</div>
</div>
</div>
<p>
This filter is found in
<span class="guimenuitem">Image>Filters/Noise/<span class="accel">N</span>oisify</span>
</p>
<p>
The Noisify filter increases, for random selected pixels in active layer or selection,
color of one or more channels. That's the equivalent of an added "noise" in sound field
</p>
</div>
<div class="simplesect" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="id3360903"></a>Options</h4>
</div>
</div>
</div>
<div class="variablelist">
<dl>
<dt>
<span class="term">Preview</span>
</dt>
<dd>
<p>
This preview displays interactively changes before they are applied to the image. It reproduces
the upper left corner of the layer or the selection.
</p>
</dd>
<dt>
<span class="term">Red Blue Green Sliders</span>
</dt>
<dd>
<p>
These slidebars and adjacent input boxes allow to set noise level (0 - 1) in each channel.
Apha channel is only present if your image holds such a channel. In case of a grayscaled
image, Red channel is for Grey and Green channel is for Alpha.
</p>
<p>
When adding color to a pixel, its color may go beyond 255. In that case, a negative value is
added and color value decreases. This may change color when value of the concerned pixel
becomes lower than that of another channel.
</p>
</dd>
<dt>
<span class="term">Independent</span>
</dt>
<dd>
<p>
If this checkbox is not checked, then all sliders move together and the same relative noise
will be added to all channels so that the image color balance will be kept.
</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="ch06s04s02.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="ch06s04.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="ch06s04s04.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">4.2. Hurl </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> 4.4. Pick</td>
</tr>
</table>
</div>
</body>
</html>
|
