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Mauro Carvalho Chehab8e080c22009-09-13 22:16:04 -03001 <refentry id="V4L2-PIX-FMT-GREY">
2 <refmeta>
3 <refentrytitle>V4L2_PIX_FMT_GREY ('GREY')</refentrytitle>
4 &manvol;
5 </refmeta>
6 <refnamediv>
7 <refname><constant>V4L2_PIX_FMT_GREY</constant></refname>
8 <refpurpose>Grey-scale image</refpurpose>
9 </refnamediv>
10 <refsect1>
11 <title>Description</title>
12
13 <para>This is a grey-scale image. It is really a degenerate
14Y'CbCr format which simply contains no Cb or Cr data.</para>
15
16 <example>
17 <title><constant>V4L2_PIX_FMT_GREY</constant> 4 &times; 4
18pixel image</title>
19
20 <formalpara>
21 <title>Byte Order.</title>
22 <para>Each cell is one byte.
23 <informaltable frame="none">
24 <tgroup cols="5" align="center">
25 <colspec align="left" colwidth="2*" />
26 <tbody valign="top">
27 <row>
28 <entry>start&nbsp;+&nbsp;0:</entry>
29 <entry>Y'<subscript>00</subscript></entry>
30 <entry>Y'<subscript>01</subscript></entry>
31 <entry>Y'<subscript>02</subscript></entry>
32 <entry>Y'<subscript>03</subscript></entry>
33 </row>
34 <row>
35 <entry>start&nbsp;+&nbsp;4:</entry>
36 <entry>Y'<subscript>10</subscript></entry>
37 <entry>Y'<subscript>11</subscript></entry>
38 <entry>Y'<subscript>12</subscript></entry>
39 <entry>Y'<subscript>13</subscript></entry>
40 </row>
41 <row>
42 <entry>start&nbsp;+&nbsp;8:</entry>
43 <entry>Y'<subscript>20</subscript></entry>
44 <entry>Y'<subscript>21</subscript></entry>
45 <entry>Y'<subscript>22</subscript></entry>
46 <entry>Y'<subscript>23</subscript></entry>
47 </row>
48 <row>
49 <entry>start&nbsp;+&nbsp;12:</entry>
50 <entry>Y'<subscript>30</subscript></entry>
51 <entry>Y'<subscript>31</subscript></entry>
52 <entry>Y'<subscript>32</subscript></entry>
53 <entry>Y'<subscript>33</subscript></entry>
54 </row>
55 </tbody>
56 </tgroup>
57 </informaltable>
58 </para>
59 </formalpara>
60 </example>
61 </refsect1>
62 </refentry>
63
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