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<h1>mmdlith
<br>
<span class="subtitle">Detect defects in a microelectronic circuit.
</span>
</h1>
<div class="descr">
<H2>Description</H2>
<div class="H2">
<p>
The input image is a gray-scale image of a microelectronic circuit. The relevant objects in this image are vertical metal stripes. These stripes have some irregularities that should be detected. Our procedure takes the residues of a gray-scale closing and filter (by size) the threshold of the residues.
</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 input image is read. The image is also displayed as a surface model.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> a = mmreadgray('r4x2_256.tif');</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(a);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(mmsurf(a));</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="254" src="../images/img_mmdlith_001.jpg"></td>
<td><img width="254" src="../images/img_mmdlith_002.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdlith_001.jpg">a</a></td>
<td><a href="../images/img_mmdlith_002.jpg">mmsurf(a)</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Closing </H3>
<div class="H3">
<p>
<p>
Closing of the image by a vertical line of length 25 pixels. Then subtract it from the original. The sequence closing-subtraction is called closing top-hat. (This could be executed in a single command: c=
<span class="fun">mmcloseth</span>(a,
<span class="fun">mmseline</span>(25,90));).
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> b = mmclose(a,mmseline(25,90));</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(b);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(mmsurf(b));</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="254" src="../images/img_mmdlith_003.jpg"></td>
<td><img width="254" src="../images/img_mmdlith_004.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdlith_003.jpg">b</a></td>
<td><a href="../images/img_mmdlith_004.jpg">mmsurf(b)</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Subtraction</H3>
<div class="H3">
<p>
<p>
Subtraction of the closing from the original is called closing top-hat. It shows the discrepancies of the image where the structuring element cannot fit the surface. In this case, it highlights vertical depression with length longer than 25 pixels.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> c = mmsubm(b,a);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(c);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(mmsurf(c));</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="254" src="../images/img_mmdlith_005.jpg"></td>
<td><img width="254" src="../images/img_mmdlith_006.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdlith_005.jpg">c</a></td>
<td><a href="../images/img_mmdlith_006.jpg">mmsurf(c)</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Thresholding and Area Open</H3>
<div class="H3">
<p>
<p>
Threshold on the residues image. Elimination of the small objects by area open.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> d = mmcmp(c,'>=',50);</pre>
<pre class="computer"></pre>
<pre class="user">>>> e = mmareaopen(d,5);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(d);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(e);</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="254" src="../images/img_mmdlith_007.jpg"></td>
<td><img width="254" src="../images/img_mmdlith_008.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdlith_007.jpg">d</a></td>
<td><a href="../images/img_mmdlith_008.jpg">e</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="slide">
<H3>Final display</H3>
<div class="H3">
<p>
<p>
Overlay the detected defects over the original image, and over the surface display.
</p>
<div class="example">
<div class="listing">
<pre class="user">>>> mmshow(a,e);</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(mmsurf(a),e);</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="254" src="../images/img_mmdlith_009.jpg"></td>
<td><img width="254" src="../images/img_mmdlith_010.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmdlith_009.jpg">a,e</a></td>
<td><a href="../images/img_mmdlith_010.jpg">mmsurf(a),e</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</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
>
629
