kopia lustrzana https://gitlab.com/sane-project/website
83 wiersze
2.9 KiB
HTML
83 wiersze
2.9 KiB
HTML
<HTML>
|
||
<HEAD>
|
||
<TITLE>gamma4scanimage.1</TITLE>
|
||
</HEAD>
|
||
<BODY BGCOLOR=#FFFFFF TEXT=#000000><H1 ALIGN=CENTER><IMG SRC="../images/sane.png" HEIGHT=117 WIDTH=346></H1>
|
||
<H1>gamma4scanimage.1</H1>
|
||
<HR>
|
||
<PRE>
|
||
<!-- Manpage converted by man2html 3.0.1 -->
|
||
<B><A HREF="gamma4scanimage.1.html">gamma4scanimage(1)</A></B> SANE Scanner Access Now Easy <B><A HREF="gamma4scanimage.1.html">gamma4scanimage(1)</A></B>
|
||
|
||
|
||
</PRE>
|
||
<H2>NAME</H2><PRE>
|
||
gamma4scanimage - create a gamma table for scanimage
|
||
|
||
|
||
</PRE>
|
||
<H2>SYNOPSIS</H2><PRE>
|
||
<B>gamma4scanimage</B> <I>gamma</I> [<I>shadow</I> [<I>highlight</I> [<I>maxin</I> [<I>maxout</I>]]]]
|
||
|
||
|
||
</PRE>
|
||
<H2>DESCRIPTION</H2><PRE>
|
||
The tool <B>gamma4scanimage</B> creates a gamma table in the format expected
|
||
by scanimage. You can define a <B>gamma,</B> a <B>shadow</B> and a <B>highlight</B> value.
|
||
You also can specify the size (<B>maxin</B>) and maximum output value (<B>maxout</B>)
|
||
of the gamma table.
|
||
|
||
<B>gamma</B> is a floating point value, neutral value is 1.0, if the value is
|
||
larger than 1.0 then the image gets brighter.
|
||
|
||
<B>shadow</B> defines the minimum input value that is necessary to create an
|
||
output value larger than zero. shadow has to be in the range
|
||
[0..maxin]. Its default value is 0.
|
||
|
||
<B>highlight</B> defines the maximum input value that produces an output value
|
||
smaller than maxout. highlight has to be in the range [0..maxin],
|
||
highlight has to be larger than shadow. Its default value is the same
|
||
as maxin (16383 if not set).
|
||
|
||
<B>maxin</B> defines the size of the gamma table. The size depends on the
|
||
scanner/backend. If the scanner uses 8 bits gamma input then maxin has
|
||
to be set to 255, for 10 bits 1023, for 12 bits 4095, for 14 bits
|
||
16383. The default is 16383. To find out what value maxin has to be
|
||
call scanimage with a very large gamma table [0]0-[99999]255 then scan‐
|
||
image prints an error message with the needed size of the gamma table.
|
||
|
||
<B>maxout</B> defines the maximum output value. Take a look at the output of
|
||
scanimage -h to find out what maxout has to be. The default value is
|
||
255.
|
||
|
||
|
||
</PRE>
|
||
<H2>EXAMPLE</H2><PRE>
|
||
<B>scanimage</B> <B>--custom-gamma=yes</B> <B>--gamma-table</B> <I>`gamma4scanimage</I> <I>1.8</I> <I>0</I> <I>11500</I>
|
||
<I>16383</I> <I>255`</I> >image.pnm
|
||
|
||
|
||
</PRE>
|
||
<H2>SEE ALSO</H2><PRE>
|
||
<B><A HREF="scanimage.1.html">scanimage(1)</A></B>
|
||
|
||
|
||
</PRE>
|
||
<H2>AUTHOR</H2><PRE>
|
||
Oliver Rauch
|
||
|
||
|
||
</PRE>
|
||
<H2>EMAIL-CONTACT</H2><PRE>
|
||
Oliver.Rauch@Rauch-Domain.DE
|
||
|
||
10 Jul 2008 <B><A HREF="gamma4scanimage.1.html">gamma4scanimage(1)</A></B>
|
||
</PRE>
|
||
<HR>
|
||
<ADDRESS>
|
||
Man(1) output converted with
|
||
<a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a>
|
||
</ADDRESS>
|
||
</BODY>
|
||
</HTML>
|