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<h1>mmunion
<br>
<span class="subtitle">Union of images.
</span>
</h1>
<div class="synopsis">
<H2>Synopsis</H2>
<div class="H2">
<div class="prototype">y =
<span class="fun">mmunion</span>(
<span class="par">f1</span>,
<span class="par">f2</span>,
<span class="par">f3</span> = None,
<span class="par">f4</span> = None,
<span class="par">f5</span> = None
)
</div>
<p>Implemented in
<b>Python.</b>
</p>
<div class="input">
<H3>Input</H3>
<div class="H3">
<table class="deflist">
<tbody valign="baseline">
<tr>
<td class="term"><span class="par">f1</span></td>
<td class="def"><span class="type"><a href="../mmtypes/mmImage.html">Image</a></span> Gray-scale (uint8 or uint16) or binary image.
</td>
</tr>
<tr>
<td class="term"><span class="par">f2</span></td>
<td class="def"><span class="type"><a href="../mmtypes/mmImage.html">Image</a></span> Gray-scale (uint8 or uint16) or binary image.
<p>Or constant</p></td>
</tr>
<tr>
<td class="term"><span class="par">f3</span></td>
<td class="def"><span class="type"><a href="../mmtypes/mmImage.html">Image</a></span> Gray-scale (uint8 or uint16) or binary image.
<p>Or constant.</p><p>Default:
<code>None</code>
</p></td>
</tr>
<tr>
<td class="term"><span class="par">f4</span></td>
<td class="def"><span class="type"><a href="../mmtypes/mmImage.html">Image</a></span> Gray-scale (uint8 or uint16) or binary image.
<p>Or constant.</p><p>Default:
<code>None</code>
</p></td>
</tr>
<tr>
<td class="term"><span class="par">f5</span></td>
<td class="def"><span class="type"><a href="../mmtypes/mmImage.html">Image</a></span> Gray-scale (uint8 or uint16) or binary image.
<p>Or constant.</p><p>Default:
<code>None</code>
</p></td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="output">
<H3>Output</H3>
<div class="H3">
<table class="deflist">
<tbody valign="baseline">
<tr>
<td class="term"><span class="par">y</span></td>
<td class="def"><span class="type"><a href="../mmtypes/mmImage.html">Image</a></span></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</div>
<div class="descr">
<H2>Description</H2>
<div class="H2">
<p>
<span class="fun">mmunion</span> creates the image
<code>y</code> by taking the pixelwise maximum between the images
<code>f1, f2, f3, f4,</code> and
<code>f5</code>. When
<code>f1, f2, f3, f4,</code> and
<code>f5</code> are binary images,
<code>y</code> represents the union of them.
</p>
</div>
</div>
<div class="examples">
<H2>Examples</H2>
<div class="H2">
<p>
<div class="bridge">Numerical example:</div>
<div class="example">
<div class="listing">
<pre class="user">>>> f=uint8([255, 255, 0, 10, 0, 255, 250])</pre>
<pre class="computer"></pre>
<pre class="user">>>> print 'f=',f</pre>
<pre class="computer">f= [255 255 0 10 0 255 250]</pre>
<pre class="user">>>> g=uint8([ 0, 40, 80, 140, 250, 10, 30])</pre>
<pre class="computer"></pre>
<pre class="user">>>> print 'g=',g</pre>
<pre class="computer">g= [ 0 40 80 140 250 10 30]</pre>
<pre class="user">>>> print mmunion(f, g)</pre>
<pre class="computer">[255 255 80 140 250 255 250]</pre>
<pre class="user">>>> print mmunion(f, 255)</pre>
<pre class="computer">Warning: Converting input image from int32 to uint8.
[255 255 255 255 255 255 255]</pre>
</div>
</div>
<div class="bridge">Binary image</div>
<div class="example">
<div class="listing">
<pre class="user">>>> a = mmreadgray('form-ok.tif')</pre>
<pre class="computer"></pre>
<pre class="user">>>> b = mmreadgray('form-1.tif')</pre>
<pre class="computer"></pre>
<pre class="user">>>> c = mmunion(a,b)</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(a)</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(b)</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(c)</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="320" src="../images/img_mmunion_001.jpg"></td>
<td><img width="320" src="../images/img_mmunion_002.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmunion_001.jpg">a</a></td>
<td><a href="../images/img_mmunion_002.jpg">b</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="320" src="../images/img_mmunion_003.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmunion_003.jpg">c</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
<div class="bridge">Binary with gray-scale image:</div>
<div class="example">
<div class="listing">
<pre class="user">>>> d = mmreadgray('danaus.tif')</pre>
<pre class="computer"></pre>
<pre class="user">>>> e = mmcmp(d,'<',80)</pre>
<pre class="computer"></pre>
<pre class="user">>>> f = mmunion(d,mmgray(e))</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>
<pre class="user">>>> mmshow(f)</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="256" src="../images/img_mmunion_004.jpg"></td>
<td><img width="256" src="../images/img_mmunion_005.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmunion_004.jpg">d</a></td>
<td><a href="../images/img_mmunion_005.jpg">e</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="256" src="../images/img_mmunion_006.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmunion_006.jpg">f</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
<div class="bridge">Gray scale image:</div>
<div class="example">
<div class="listing">
<pre class="user">>>> g = mmreadgray('tplayer1.tif')</pre>
<pre class="computer"></pre>
<pre class="user">>>> h = mmreadgray('tplayer2.tif')</pre>
<pre class="computer"></pre>
<pre class="user">>>> i = mmreadgray('tplayer3.tif')</pre>
<pre class="computer"></pre>
<pre class="user">>>> j = mmunion(g,h,i)</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(g)</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(h)</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(i)</pre>
<pre class="computer"></pre>
<pre class="user">>>> mmshow(j)</pre>
<pre class="computer"></pre>
</div>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="212" src="../images/img_mmunion_007.jpg"></td>
<td><img width="212" src="../images/img_mmunion_008.jpg"></td>
<td><img width="212" src="../images/img_mmunion_009.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmunion_007.jpg">g</a></td>
<td><a href="../images/img_mmunion_008.jpg">h</a></td>
<td><a href="../images/img_mmunion_009.jpg">i</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
<table class="images">
<tbody align="center">
<tr class="image" valign="bottom">
<td><img width="212" src="../images/img_mmunion_010.jpg"></td>
<td class="spare"></td>
</tr>
<tr class="title" valign="baseline">
<td><a href="../images/img_mmunion_010.jpg">j</a></td>
<td class="spare"></td>
</tr>
</tbody>
</table>
</div>
</p>
</div>
</div>
<div class="equation">
<H2>Equation</H2>
<div class="H2">
<p>
<div class="bridge">union:</div>
<div class="eqfig">
<img src="../images/eq_mmunion001.png">
</div>
<div class="bridge">generalized union:</div>
<div class="eqfig">
<img src="../images/eq_mmunion002.png">
</div>
</p>
</div>
</div>
<div class="sourcecode">
<H2>Source Code</H2>
<div class="H2">
<pre class="listing">
def mmunion(f1, f2, f3=None, f4=None, f5=None):
from Numeric import maximum
y = maximum(f1,f2)
if f3: y = maximum(y,f3)
if f4: y = maximum(y,f4)
if f5: y = maximum(y,f5)
y = y.astype(f1.typecode())
return y
</pre>
</div>
</div>
<div class="seealso">
<H2>See also</H2>
<div class="H2">
<table class="deflist">
<tbody valign="baseline">
<tr>
<td class="term"><a href="../morph/mmfreedom.html">mmfreedom</a></td>
<td class="def">Control automatic data type conversion.</td>
</tr>
<tr>
<td class="term"><a href="../morph/mmintersec.html">mmintersec</a></td>
<td class="def">Intersection of images.</td>
</tr>
</tbody>
</table>
</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
>
758
