Documentation/DocBook/v4l/pixfmt-sgrbg8.xml

   1     <refentry id="V4L2-PIX-FMT-SGRBG8">
   2       <refmeta>
   3         <refentrytitle>V4L2_PIX_FMT_SGRBG8 ('GRBG')</refentrytitle>
   4         &manvol;
   5       </refmeta>
   6       <refnamediv>
   7         <refname><constant>V4L2_PIX_FMT_SGRBG8</constant></refname>
   8         <refpurpose>Bayer RGB format</refpurpose>
   9       </refnamediv>
  10       <refsect1>
  11         <title>Description</title>
  12
  13         <para>This is commonly the native format of digital cameras,
  14 reflecting the arrangement of sensors on the CCD device. Only one red,
  15 green or blue value is given for each pixel. Missing components must
  16 be interpolated from neighbouring pixels. From left to right the first
  17 row consists of a green and blue value, the second row of a red and
  18 green value. This scheme repeats to the right and down for every two
  19 columns and rows.</para>
  20
  21         <example>
  22           <title><constant>V4L2_PIX_FMT_SGRBG8</constant> 4 &times;
  23 4 pixel image</title>
  24
  25           <formalpara>
  26             <title>Byte Order.</title>
  27             <para>Each cell is one byte.
  28               <informaltable frame="none">
  29                 <tgroup cols="5" align="center">
  30                   <colspec align="left" colwidth="2*" />
  31                   <tbody valign="top">
  32                     <row>
  33                       <entry>start&nbsp;+&nbsp;0:</entry>
  34                       <entry>G<subscript>00</subscript></entry>
  35                       <entry>R<subscript>01</subscript></entry>
  36                       <entry>G<subscript>02</subscript></entry>
  37                       <entry>R<subscript>03</subscript></entry>
  38                     </row>
  39                     <row>
  40                       <entry>start&nbsp;+&nbsp;4:</entry>
  41                       <entry>R<subscript>10</subscript></entry>
  42                       <entry>B<subscript>11</subscript></entry>
  43                       <entry>R<subscript>12</subscript></entry>
  44                       <entry>B<subscript>13</subscript></entry>
  45                     </row>
  46                     <row>
  47                       <entry>start&nbsp;+&nbsp;8:</entry>
  48                       <entry>G<subscript>20</subscript></entry>
  49                       <entry>R<subscript>21</subscript></entry>
  50                       <entry>G<subscript>22</subscript></entry>
  51                       <entry>R<subscript>23</subscript></entry>
  52                     </row>
  53                     <row>
  54                       <entry>start&nbsp;+&nbsp;12:</entry>
  55                       <entry>R<subscript>30</subscript></entry>
  56                       <entry>B<subscript>31</subscript></entry>
  57                       <entry>R<subscript>32</subscript></entry>
  58                       <entry>B<subscript>33</subscript></entry>
  59                     </row>
  60                   </tbody>
  61                 </tgroup>
  62               </informaltable>
  63             </para>
  64           </formalpara>
  65         </example>
  66       </refsect1>
  67     </refentry>
  68
  69   <!--
  70 Local Variables:
  71 mode: sgml
  72 sgml-parent-document: "pixfmt.sgml"
  73 indent-tabs-mode: nil
  74 End:
  75   -->