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<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<!DOCTYPE MAN SYSTEM "mansivp.dtd">
<MAN>
<LANGUAGE>eng</LANGUAGE>
<TITLE>filter2</TITLE>
<TYPE>SIVP Toolbox</TYPE>
<DATE>July, 2006</DATE>
<SHORT_DESCRIPTION name="filter2">2D digital filtering</SHORT_DESCRIPTION>
<CALLING_SEQUENCE>
<CALLING_SEQUENCE_ITEM>C = filter2(F,im)</CALLING_SEQUENCE_ITEM>
</CALLING_SEQUENCE>
<PARAM>
<PARAM_INDENT>
<PARAM_ITEM>
<PARAM_NAME>im</PARAM_NAME>
<PARAM_DESCRIPTION>
An image/matrix which will be filterd. The image can be INT8, UINT8, INT16, UINT16, INT32, DOUBLE.
</PARAM_DESCRIPTION>
</PARAM_ITEM>
<PARAM_ITEM>
<PARAM_NAME>F</PARAM_NAME>
<PARAM_DESCRIPTION>
A double 2D filter.
</PARAM_DESCRIPTION>
</PARAM_ITEM>
<PARAM_ITEM>
<PARAM_NAME>imf</PARAM_NAME>
<PARAM_DESCRIPTION>
The filtered image which has the same size with <TT>imf</TT> and the class double.
</PARAM_DESCRIPTION>
</PARAM_ITEM>
</PARAM_INDENT>
</PARAM>
<DESCRIPTION>
<P><TT>filter2</TT> filters an image <TT>im</TT> with filter <TT>F</TT>.
When <TT>im</TT> is a mult-channel image, each channel can be filtered with <TT>F</TT> seperately.
Input image pixel values outside the bounds of the image are assumed to
equal the nearest array border value.
</P>
<P>
The only diffence of <TT>filter2</TT> with <TT>imfilter</TT> is
the output of <TT>filter2</TT> is double matrix,
and the output of <TT>imfilter</TT> has the same type as input
and the elements in the output matrix that
exceed the range of the integer type will be truncated.
</P>
</DESCRIPTION>
<EXAMPLE><![CDATA[
im = imread('lena.png');
filter = fspecial('sobel');
imf = filter2(filter,im);
]]></EXAMPLE>
<!-- ================================= -->
<AUTHORS>
<AUTHORS_ITEM name="Shiqi"> Shiqi Yu <shiqi.yu[at]gmail.com> </AUTHORS_ITEM>
</AUTHORS>
<!-- ================================= -->
<SECTION label="Availability">
The latest version of SIVP can be found at
<P><A href="http://sivp.sourceforge.net">http://sivp.sourceforge.net</A></P>
</SECTION>
<!-- ================================= -->
<SEE_ALSO>
<SEE_ALSO_ITEM> <LINK>fspecial</LINK> </SEE_ALSO_ITEM>
<SEE_ALSO_ITEM> <LINK>imfilter</LINK> </SEE_ALSO_ITEM>
</SEE_ALSO>
</MAN>
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