Sophie: php-manual-pt_BR-5.2.4-1mdv2008.1 noarch

php-manual-pt_BR-5.2.4-1mdv2008.1.noarch.rpm

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><H1
><A
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>imageconvolution</H1
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><A
NAME="AEN83414"
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><P
>    (PHP 5 &#62;= 5.1.0RC1)</P
>imageconvolution&nbsp;--&nbsp;Apply a 3x3 convolution matrix, using coefficient and offset</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN83417"
></A
><H2
>Descrição</H2
>bool <B
CLASS="methodname"
>imageconvolution</B
> ( resource image, array matrix, float div, float offset )<BR
></BR
><P
>&#13;   Applies a convolution matrix on the image, using the given coefficient and
   offset.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN83435"
></A
><H2
>Parâmetros</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>&#13; image</CODE
></DT
><DD
><P
>An image resource, returned by one of the image creation functions,
 such as <A
HREF="function.imagecreatetruecolor.html"
><B
CLASS="function"
>imagecreatetruecolor()</B
></A
>.</P
></DD
><DT
><CODE
CLASS="parameter"
>matrix</CODE
></DT
><DD
><P
>&#13;       A 3x3 matrix: an array of three arrays of three floats.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>div</CODE
></DT
><DD
><P
>&#13;       The divisor of the result of the convolution, used for normalization.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>offset</CODE
></DT
><DD
><P
>&#13;      </P
></DD
></DL
></DIV
>
  </P
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><DIV
CLASS="refsect1"
><A
NAME="AEN83460"
></A
><H2
>Valores de retornado</H2
><P
>&#13;   Retorna <TT
CLASS="constant"
><B
>TRUE</B
></TT
> em caso de sucesso ou <TT
CLASS="constant"
><B
>FALSE</B
></TT
> em falhas.
  </P
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><DIV
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NAME="AEN83465"
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><H2
>Exemplos</H2
><P
>&#13;   <TABLE
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><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN83468"
></A
><P
><B
>Exemplo 1. Embossing the PHP.net logo</B
></P
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$image </font><font color="#007700">= </font><font color="#0000BB">imagecreatefromgif</font><font color="#007700">(</font><font color="#DD0000">'http://www.php.net/images/php.gif'</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$emboss </font><font color="#007700">= array(array(</font><font color="#0000BB">2</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">), array(</font><font color="#0000BB">0</font><font color="#007700">, -</font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">), array(</font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, -</font><font color="#0000BB">1</font><font color="#007700">));<br /></font><font color="#0000BB">imageconvolution</font><font color="#007700">(</font><font color="#0000BB">$image</font><font color="#007700">, </font><font color="#0000BB">$emboss</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">127</font><font color="#007700">);<br /><br /></font><font color="#0000BB">header</font><font color="#007700">(</font><font color="#DD0000">'Content-Type: image/png'</font><font color="#007700">);<br /></font><font color="#0000BB">imagepng</font><font color="#007700">(</font><font color="#0000BB">$image</font><font color="#007700">, </font><font color="#0000BB">null</font><font color="#007700">, </font><font color="#0000BB">9</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>O exemplo acima irá imprimir:</P
><P
><IMG
SRC="figures/image.imageconvolution_emboss.png"></P
></DIV
></TD
></TR
></TABLE
>
   <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN83474"
></A
><P
><B
>Exemplo 2. Gaussian blur</B
></P
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$image </font><font color="#007700">= </font><font color="#0000BB">imagecreatetruecolor</font><font color="#007700">(</font><font color="#0000BB">180</font><font color="#007700">,</font><font color="#0000BB">40</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// Writes the text and apply a gaussian blur on the image<br /></font><font color="#0000BB">imagestring</font><font color="#007700">(</font><font color="#0000BB">$image</font><font color="#007700">, </font><font color="#0000BB">5</font><font color="#007700">, </font><font color="#0000BB">10</font><font color="#007700">, </font><font color="#0000BB">8</font><font color="#007700">, </font><font color="#DD0000">'Gaussian Blur Text'</font><font color="#007700">, </font><font color="#0000BB">0x00ff00</font><font color="#007700">);<br /></font><font color="#0000BB">$gaussian </font><font color="#007700">= array(array(</font><font color="#0000BB">1.0</font><font color="#007700">, </font><font color="#0000BB">2.0</font><font color="#007700">, </font><font color="#0000BB">1.0</font><font color="#007700">), array(</font><font color="#0000BB">2.0</font><font color="#007700">, </font><font color="#0000BB">4.0</font><font color="#007700">, </font><font color="#0000BB">2.0</font><font color="#007700">), array(</font><font color="#0000BB">1.0</font><font color="#007700">, </font><font color="#0000BB">2.0</font><font color="#007700">, </font><font color="#0000BB">1.0</font><font color="#007700">));<br /></font><font color="#0000BB">imageconvolution</font><font color="#007700">(</font><font color="#0000BB">$image</font><font color="#007700">, </font><font color="#0000BB">$gaussian</font><font color="#007700">, </font><font color="#0000BB">16</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// Rewrites the text for comparison<br /></font><font color="#0000BB">imagestring</font><font color="#007700">(</font><font color="#0000BB">$image</font><font color="#007700">, </font><font color="#0000BB">5</font><font color="#007700">, </font><font color="#0000BB">10</font><font color="#007700">, </font><font color="#0000BB">18</font><font color="#007700">, </font><font color="#DD0000">'Gaussian Blur Text'</font><font color="#007700">, </font><font color="#0000BB">0x00ff00</font><font color="#007700">);<br /><br /></font><font color="#0000BB">header</font><font color="#007700">(</font><font color="#DD0000">'Content-Type: image/png'</font><font color="#007700">);<br /></font><font color="#0000BB">imagepng</font><font color="#007700">(</font><font color="#0000BB">$image</font><font color="#007700">, </font><font color="#0000BB">null</font><font color="#007700">, </font><font color="#0000BB">9</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>O exemplo acima irá imprimir:</P
><P
><IMG
SRC="figures/image.imageconvolution_gaussian.png"></P
></DIV
></TD
></TR
></TABLE
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN83480"
></A
><H2
>Notas</H2
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>Esta função somente está disponível se
 o PHP estiver compilado com a versão embarcada da biblioteca GD.</P
></BLOCKQUOTE
></DIV
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><DIV
CLASS="refsect1"
><A
NAME="AEN83484"
></A
><H2
>Veja também</H2
><P
>&#13;   <P
></P
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><A
HREF="function.imagefilter.html"
><B
CLASS="function"
>imagefilter()</B
></A
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></P
>
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