1 <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 × 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 + 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 + 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 + 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 + 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 64 <!-- 65Local Variables: 66mode: sgml 67sgml-parent-document: "pixfmt.sgml" 68indent-tabs-mode: nil 69End: 70 --> 71