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
|
.TH BLIND-KERNEL 1 blind
.SH NAME
blind-kernel - Create a convolution matrix
.SH SYNOPSIS
.B blind-kernel
[-xyza]
.I kernel
.RI [ parameter ]\ ...
.SH DESCRIPTION
.B blind-kernel
creates a convolution matrix that can be applied to
a video using
.BR blind-apply-kernel (1).
The convolution matrix is created from a set
of standard formulae. The formula is selected
using the
.I kernel
argument and is tuned with
.IR kernel -specific
.IR parameter s.
.SH KERNELS
.TP
.RI ' \fBbox\ blur\fP '\ [-w\ weight ]\ [ spread \ |\ x-spread \ y-spread ]
Creates a box blur kernel. Unless
.B -w
is used, the kernel is unweighted, otherwise it has the specified
.IR weight .
The kernel will have the spread 1, the specified
.IR spread ,
or
.I x-spread
as the horizontal spread and
.I y-spread
as the vertical spread.
.TP
.BR emboss \ [\fIdirection\fP]
Create an emboss kernel with the specified
.IR direction .
The
.I direction
must be
.BR N ;
.BR NW
or
.BR WN ;
.BR W ;
.BR SW
or
.BR WS ;
.BR S ;
.BR SE
or
.BR ES ;
.BR E ;
.BR NE
or
.BR EN .
If no
.I direction
is specified,
.B SE
is used.
.TP
.RI \fBgaussian\fP\ [-s\ spread ]\ [-g\ |\ -u]\ standard-deviation
Creates a Gaussian blur kernel with the standard deviation
.IR standard-deviation .
If
.B -u
is used, the a Gaussian unsharpen kernel is created.
If
.B -g
is used, the a Gaussian blur kernel with glow effect is created.
If
.B -s
is specified, the specified
.I spread
will be used, otherwise the spread will be selected automatically.
.TP
.BI gradient\ direction
Create a gradient detection kernel with the specified
.IR direction .
The
.I direction
must be
.BR N ;
.BR NW
or
.BR WN ;
.BR W ;
.BR SW
or
.BR WS ;
.BR S
or
.BR H ;
.BR SE
or
.BR ES ;
.BR E
or
.BR V ;
.BR NE
or
.BR EN .
.TP
.BI kirsch\ direction
Create a Kirsch kernel with the specified
.IR direction .
The
.I direction
must be
.B 1
or
.BR N ;
.BR 2 ,
.BR NW ,
or
.BR WN ;
.BR 3
or
.BR W ;
.BR 4 ,
.BR SW ,
or
.BR WS ;
.BR 5
or
.BR S ;
.BR 6 ,
.BR SE ,
or
.BR ES ;
.BR 7
or
.BR E ;
or
.BR 8 ,
.BR NE ,
or
.BR EN .
.TP
.BR sharpen \ [-i]
Creates a sharpen kernel. If
.B -i
is used, an intensified sharpen kernel is created.
.TP
.BI sobel\ direction
Create a Sobel operator kernel with the specified
.IR direction .
The
.I direction
must be
.BR N
or
.BR H ;
.BR NW
or
.BR WN ;
.BR W
or
.BR V ;
.BR SW
or
.BR WS ;
.BR S ;
.BR SE
or
.BR ES ;
.BR E ;
.BR NE
or
.BR EN .
.SH OPTIONS
.TP
.B -a
Apply the values to the alpha channel, apply an
identity kernel to all unselected channels.
.TP
.B -x
Apply the values to the X channel, apply an
identity kernel to all unselected channels.
.TP
.B -y
Apply the values to the Y channel, apply an
identity kernel to all unselected channels.
.TP
.B -z
Apply the values to the Z channel, apply an
identity kernel to all unselected channels.
.SH NOTES
.B blind-make-kernel
Create a single frame, to that it can be stored to
disc. When applying it to a video, you want to use
.BR blind-repeat (1).
.SH SEE ALSO
.BR blind (7),
.BR blind-apply-kernel (1),
.BR blind-kernel (1),
.BR blind-repeat (1)
.SH AUTHORS
Mattias Andrée
.RI < maandree@kth.se >
|
