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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
<?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>9.5. Sparkle</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="ch06s09.html" title="9. Light Effects filters" />
<link rel="prev" href="ch06s09s04.html" title="9.4. Lighting Effects" />
<link rel="next" href="ch06s09s06.html" title="9.6. SuperNova" />
</head>
<body>
<div xmlns="" class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center" id="chaptername">9.5. Sparkle</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="ch06s09s04.html">Prev</a> </td>
<th width="60%" align="center" id="sectionname">9.5. Sparkle</th>
<td width="20%" align="right"> <a accesskey="n" href="ch06s09s06.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-sparkle"></a>9.5. Sparkle</h3>
</div>
</div>
</div>
<a id="id3365056" class="indexterm"></a>
<div class="mediaobject">
<img src="../images/filters/filters-light-sparkle.png" />
</div>
<div class="simplesect" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="id3365821"></a>Overview</h4>
</div>
</div>
</div>
<p>
This filter is found in
<span class="guimenuitem">Image>Filters/Light Effects/Sparkle</span>.
</p>
<p>
This filter adds sparkles to your image. It uses the lightest points according to a threshold
you have determined. It is difficult to foresee where sparkles will appear. But you can put
white points on your image where you want sparkles to be.
</p>
</div>
<div class="simplesect" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="id3365756"></a>Parameter Settings</h4>
</div>
</div>
</div>
<p>
Sliders and input boxes allow you to set values.
</p>
<div class="variablelist">
<dl>
<dt>
<span class="term">Luminosity Threshold</span>
</dt>
<dd>
<p>
The higher the threshold, the more areas are concerned by sparkling (0.0-0.1).
</p>
</dd>
<dt>
<span class="term">Flare Intensity</span>
</dt>
<dd>
<p>
When this value increases, the central spot and rays widen (0.0-1.0).
</p>
</dd>
<dt>
<span class="term">Spike Length</span>
</dt>
<dd>
<p>
This is ray length (1-100). When you reduce it, small spikes decrease first.
</p>
</dd>
<dt>
<span class="term">Spike Points</span>
</dt>
<dd>
<p>
Number of starting points for spikes (0-16). It's the number of big spikes. There is the same
number of small spikes. When number is odd, small spikes are opposite the big ones. When number
is even, big spikes are opposite another big spike.
</p>
</dd>
<dt>
<span class="term">Spike Angle</span>
</dt>
<dd>
<p>
This is angle of first big spike with horizontal (-1 +360). -1 determines this value at random.
If a spot has several pixels within required threshold, each of them will generate a sparkle.
If angle is positive, they will all be superimposed. With -1, each sparkle will have a random
rotation resulting in numerous thin spikes.
</p>
</dd>
<dt>
<span class="term">Spike Density</span>
</dt>
<dd>
<p>
This option determines the number of sparkles on your image. It indicates the percentage
(0.0-1.0) of all possible sparkles that will be preserved.
</p>
</dd>
<dt>
<span class="term">Opacity</span>
</dt>
<dd>
<p>
When you decrease Opacity (0.0-1.0), sparkles become more transparent and the layer beneath
becomes visible. If there is no other layer, sparkle saturation decreases.
</p>
</dd>
<dt>
<span class="term">Random Hue</span>
</dt>
<dd>
<p>
This option should change sparkle hue at random... (0.0-1.0)
</p>
</dd>
<dt>
<span class="term">Random Saturation</span>
</dt>
<dd>
<p>
This option should change sparkle saturation at random... (0.0-1.0)
</p>
</dd>
<dt>
<span class="term">Preserve Luminosity</span>
</dt>
<dd>
<p>
Gives to all central pixels the luminosity of the brightest pixel, resulting in increasing
the whole sparkle luminosity.
</p>
</dd>
<dt>
<span class="term">Inverse</span>
</dt>
<dd>
<p>
Instead of selecting brightest pixels in image, Sparkle will select the darkest ones, resulting
in dark sparkles.
</p>
</dd>
<dt>
<span class="term">Add Border</span>
</dt>
<dd>
<p>
Instead of creating sparkles on brightest pixels, this option creates an image border made up of
numerous sparkles.
</p>
</dd>
<dt>
<span class="term">Colors</span>
</dt>
<dd>
<p>
You can change there the color of central pixels. This color will be added in Screen mode
(Multiply if Inverse is checked).
</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="ch06s09s04.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="ch06s09.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="ch06s09s06.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">9.4. Lighting Effects </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> 9.6. SuperNova</td>
</tr>
</table>
</div>
</body>
</html>
|
