Documentation/DocBook/media/v4l/pixfmt-z16.xml


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<refentry id="V4L2-PIX-FMT-Z16">
  <refmeta>
    <refentrytitle>V4L2_PIX_FMT_Z16 ('Z16 ')</refentrytitle>
    &manvol;
  </refmeta>
  <refnamediv>
    <refname><constant>V4L2_PIX_FMT_Z16</constant></refname>
    <refpurpose>Interleaved grey-scale image, e.g. from a stereo-pair</refpurpose>
  </refnamediv>
  <refsect1>
    <title>Description</title>

    <para>This is a 16-bit format, representing depth data. Each pixel is a
distance to the respective point in the image coordinates. Distance unit can
vary and has to be negotiated with the device separately. Each pixel is stored
in a 16-bit word in the little endian byte order.
</para>

    <example>
      <title><constant>V4L2_PIX_FMT_Z16</constant> 4 &times; 4
pixel image</title>

      <formalpara>
	<title>Byte Order.</title>
	<para>Each cell is one byte.
	  <informaltable frame="none">
	    <tgroup cols="9" align="center">
	      <colspec align="left" colwidth="2*" />
	      <tbody valign="top">
		<row>
		  <entry>start&nbsp;+&nbsp;0:</entry>
		  <entry>Z<subscript>00low</subscript></entry>
		  <entry>Z<subscript>00high</subscript></entry>
		  <entry>Z<subscript>01low</subscript></entry>
		  <entry>Z<subscript>01high</subscript></entry>
		  <entry>Z<subscript>02low</subscript></entry>
		  <entry>Z<subscript>02high</subscript></entry>
		  <entry>Z<subscript>03low</subscript></entry>
		  <entry>Z<subscript>03high</subscript></entry>
		</row>
		<row>
		  <entry>start&nbsp;+&nbsp;8:</entry>
		  <entry>Z<subscript>10low</subscript></entry>
		  <entry>Z<subscript>10high</subscript></entry>
		  <entry>Z<subscript>11low</subscript></entry>
		  <entry>Z<subscript>11high</subscript></entry>
		  <entry>Z<subscript>12low</subscript></entry>
		  <entry>Z<subscript>12high</subscript></entry>
		  <entry>Z<subscript>13low</subscript></entry>
		  <entry>Z<subscript>13high</subscript></entry>
		</row>
		<row>
		  <entry>start&nbsp;+&nbsp;16:</entry>
		  <entry>Z<subscript>20low</subscript></entry>
		  <entry>Z<subscript>20high</subscript></entry>
		  <entry>Z<subscript>21low</subscript></entry>
		  <entry>Z<subscript>21high</subscript></entry>
		  <entry>Z<subscript>22low</subscript></entry>
		  <entry>Z<subscript>22high</subscript></entry>
		  <entry>Z<subscript>23low</subscript></entry>
		  <entry>Z<subscript>23high</subscript></entry>
		</row>
		<row>
		  <entry>start&nbsp;+&nbsp;24:</entry>
		  <entry>Z<subscript>30low</subscript></entry>
		  <entry>Z<subscript>30high</subscript></entry>
		  <entry>Z<subscript>31low</subscript></entry>
		  <entry>Z<subscript>31high</subscript></entry>
		  <entry>Z<subscript>32low</subscript></entry>
		  <entry>Z<subscript>32high</subscript></entry>
		  <entry>Z<subscript>33low</subscript></entry>
		  <entry>Z<subscript>33high</subscript></entry>
		</row>
	      </tbody>
	    </tgroup>
	  </informaltable>
	</para>
      </formalpara>
    </example>
  </refsect1>
</refentry>