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tutorautolinegraph.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Engauge Digitizer - Automatic Line Graph Tutorial</TITLE>
<META NAME="keywords" CONTENT="Engauge Digitizer, browser based documentation, online manual, Digitize Line Graph Tutorial">
<META NAME="description" CONTENT="Tutorial explains automatically digitizing line graphs">
</HEAD>
<BODY>
<H2>
<A HREF="index.html">
<IMG SRC="animation.png" ALIGN=MIDDLE ALT="" STYLE="border: 0px"></A>
Engauge Digitizer - Automatic Line Graph Tutorial</H2>
<HR WIDTH="100%">
<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>
</BODY>
</HTML>