| Mauro Carvalho Chehab | 8e080c2 | 2009-09-13 22:16:04 -0300 | [diff] [blame] | 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 |
| 14 | Y'CbCr format which simply contains no Cb or Cr data.</para> |
| 15 | |
| 16 | <example> |
| 17 | <title><constant>V4L2_PIX_FMT_GREY</constant> 4 × 4 |
| 18 | pixel 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 | <!-- |
| 65 | Local Variables: |
| 66 | mode: sgml |
| 67 | sgml-parent-document: "pixfmt.sgml" |
| 68 | indent-tabs-mode: nil |
| 69 | End: |
| 70 | --> |