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  Engauge Digitizer - Automatic Line Graph Tutorial</H2>
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<H3>Automatically Digitizing A Line Graph Image</H3>
<P>The following steps automatically digitize a linear cartesian graph with 
one curve./P>
<UL>
<LI>Import the testcase.png case from the Samples directory, using 
File/Import as shown. Not shown are the other methods of importing:
using the <A HREF="commandlineoptions.html">"-import" command line option</A>, 
by copying and pasting, and by dragging and dropping</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutorautolinegraph1.png" ALT=""></P>
<UL>
<LI>Click on the Axes Point button before entering axes points. These will 
define the coordinate system</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutorautolinegraph2.png" ALT=""></P>
<UL>
<LI>Click on one of the axes to add the first axes point, then enter its 
graph coordinates</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutorautolinegraph3.png" ALT=""></P>
<UL>
<LI>Click on one of the axes to add the second axes point, then enter its 
graph coordinates</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutorautolinegraph4.png" ALT=""></P>
<UL>
<LI>Click on one of the axes to add the third axes point, then enter its 
graph coordinates</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutorautolinegraph5.png" ALT=""></P>
<UL>
<LI>View the processed image by selecting the View/Processed Image
menu option.</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutorautolinegraph6.png" ALT=""></P>
<UL>
<LI>Tune the discretize settings using the Settings/Discretize 
menu option, so unwanted information in the image is removed. 
The dialog that appears is explained at
<A HREF="dlgdiscretize.html">Discretize Dialog</A>.</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutorautolinegraph7.png" ALT=""></P>
<UL>
<LI>Click on the <A NAME="segmentfill">Segment Fill</A> button.</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutorautolinegraph9.png" ALT=""></P>
<UL>
<LI>Click on each segment of the curve to add regularly spaced
curve points along that segment. Repeat until points have been
created for all of the segments in the graph.</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutorautolinegraph10.png" ALT=""></P>
<UL>
<LI>Export the curve points into a tabular text file using the 
File/Export As menu option as shown. Not shown are the other methods of
exporting the curve points from the
<A HREF="dlgcurvegeometry.html">curve geometry window</A>: copying and pasting,
and dragging and dropping</LI>
</UL>
<P ALIGN="center"><IMG SRC="tutorautolinegraph11.png" ALT=""></P>
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