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<td class="title">Demonstrations</td>
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<h1>mmdpcb
<br>
<span class="subtitle">Decompose a printed circuit board in its main parts.
</span>
</h1>
<div class="descr">
<H2>Description</H2>
<div class="H2">
<p>
The input image is a binary image of a printed circuit board. The decomposition is created mainly using openings by structural elements that depends on the geometry of the circuit board.
</p>
</div>
</div>
<div class="script">
<H2>Demo Script</H2>
<div class="H2">
<div class="slide">
<H3>Reading</H3>
<div class="H3">
<p>
<p>
The binary image of a printed circuit board is read.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> a = mmreadgray('pcb1bin.tif');</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(a);</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="258" src="../images/img_mmdpcb_001.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdpcb_001.jpg">a</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Detecting holes</H3>
<div class="H3">
<p>
<p>
A new image is created by filling the holes. The input image is subtracted from this new image with holes. The resulting residues are the holes.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> b = mmclohole(a);</pre>
<pre class="computer"></pre>
<pre class="user">>>> holes = mmsubm(b,a);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(b);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(a, holes);</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="258" src="../images/img_mmdpcb_002.jpg"></td>
<td><img width="258" src="../images/img_mmdpcb_003.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdpcb_002.jpg">b</a></td>
<td><a href="../images/img_mmdpcb_003.jpg">a, holes</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Detecting square islands</H3>
<div class="H3">
<p>
<p>
The square islands are detected using an opening by a square of size 17x17.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> c = mmopen(b,mmsebox(8));</pre>
<pre class="computer"></pre>
<pre class="user">>>> square = mmcdil(c, a);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(b, c);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(holes, square);</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="258" src="../images/img_mmdpcb_004.jpg"></td>
<td><img width="258" src="../images/img_mmdpcb_005.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdpcb_004.jpg">b, c</a></td>
<td><a href="../images/img_mmdpcb_005.jpg">holes, square</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Detecting circle islands</H3>
<div class="H3">
<p>
<p>
The circle islands are detected using an opening by an Euclidean disk on a residues image.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> f = mmsubm(b, c);</pre>
<pre class="computer"></pre>
<pre class="user">>>> g = mmopen(f, mmsedisk(8));</pre>
<pre class="computer"></pre>
<pre class="user">>>> circle = mmcdil(g,a);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(f, g);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(holes, square, circle);</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="258" src="../images/img_mmdpcb_006.jpg"></td>
<td><img width="258" src="../images/img_mmdpcb_007.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdpcb_006.jpg">f, g</a></td>
<td><a href="../images/img_mmdpcb_007.jpg">holes, square, circle</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Detecting rectangular islands</H3>
<div class="H3">
<p>
<p>
The rectangular islands are detected using an opening by a rectangle of size 25 x 8 on a residues image. The rectangle structuring element is built from the composition of vertical and horizontal lines.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> i = mmsubm(f, g);</pre>
<pre class="computer"></pre>
<pre class="user">>>> m = mmopen(i,mmsedil(mmseline(8,90), mmseline(25)));</pre>
<pre class="computer"></pre>
<pre class="user">>>> rect = mmcdil(m,a);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(i, m);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(holes, square, circle, rect);</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="258" src="../images/img_mmdpcb_008.jpg"></td>
<td><img width="258" src="../images/img_mmdpcb_009.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdpcb_008.jpg">i, m</a></td>
<td><a href="../images/img_mmdpcb_009.jpg">holes, square, circle, rect</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Detecting thick connections</H3>
<div class="H3">
<p>
<p>
The thick connections are detected using an opening by a square on a residues image.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> o = mmsubm(i,m);</pre>
<pre class="computer"></pre>
<pre class="user">>>> p = mmopen(o, mmsebox(2));</pre>
<pre class="computer"></pre>
<pre class="user">>>> thin = mmcdil(p,a);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(o, p);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(holes, square, circle, rect, thin);</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="258" src="../images/img_mmdpcb_010.jpg"></td>
<td><img width="258" src="../images/img_mmdpcb_011.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdpcb_010.jpg">o, p</a></td>
<td><a href="../images/img_mmdpcb_011.jpg">holes, square, circle, rect, thin</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Detecting thin connections</H3>
<div class="H3">
<p>
<p>
The thin connections are detected using an opening by a square on a residues image.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> r = mmsubm(o,p);</pre>
<pre class="computer"></pre>
<pre class="user">>>> s = mmopen(r, mmsebox());</pre>
<pre class="computer"></pre>
<pre class="user">>>> thick = mmcdil(s,a);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(r, s);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(holes, square, circle, rect, thin, thick);</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="258" src="../images/img_mmdpcb_012.jpg"></td>
<td><img width="258" src="../images/img_mmdpcb_013.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdpcb_012.jpg">r, s</a></td>
<td><a href="../images/img_mmdpcb_013.jpg">holes, square, circle, rect, thin, thick</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Displaying all together</H3>
<div class="H3">
<p>
<p>
The main components of the circuit are overlayed and presented in a single image.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> mmshow(holes, square, circle, rect, thin, thick);</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="258" src="../images/img_mmdpcb_014.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdpcb_014.jpg">holes, square, circle, rect, thin, thick</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
</div>
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<td class="copyright">Copyright (c) 2003, Roberto A. Lotufo, UNICAMP-University of Campinas; Rubens C. Machado, CenPRA-Renato Archer Research Center.</td>
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distrib
>
Mandriva
>
2010.0
>
i586
>
media
>
contrib-release
>
by-pkgid
>
4a71d9984febeb5a206904a5a379841a
>
files
>
630
