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List: html5-help
Subject: [html5] a question about canvas element's shadow effect
From: "caoyipeng" <caoyp () cn ! fujitsu ! com>
Date: 2009-05-20 1:27:24
Message-ID: 2E9A38A0754E4E22B85E659E028883ED () FNSTcyp
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canvas element's shadow effect use Gaussian blur to fulfill.
In Gaussian blur, when do convolution operation, Gaussian template's size(or
Gaussian kernel width and height) affect the blur effect
,is there default value about Gaussian template's size(such as the size is
(6ó+1)*(6ó+1),ó is the standard deviation).
Regards
C.Y.P.
Cao Yipeng
Development Dept.I
Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST)
8/F., Civil Defense Building, No.189 Guangzhou Road ,
Nanjing , 210029, China
TEL: +86+25-86630566-817
COINS: 79955-817
FAX: +86+25-83317685
MAIL: caoyp@cn.fujitsu.com
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<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>canvas element's shadow effect use Gaussian blur to \
fulfill.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>In Gaussian blur, when do convolution operation, Gaussian
template's size(or Gaussian kernel width and height) affect the blur \
effect<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'>,is there default value about Gaussian template’s
size(such as the size is (6ó+1)*(6ó+1),ó is the standard \
deviation).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span lang=EN-US style='font-size:
9.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Times New Roman"><span
lang=EN-US style='font-size:10.0pt;color:navy'>Regards</span></font><font
size=2 color=black><span lang=EN-US style='font-size:10.0pt;color:black'><br>
</span></font><font size=2 color=navy><span lang=EN-US style='font-size:10.0pt;
color:navy'>C.Y.P.</span></font><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=blue face="Times New Roman"><span
lang=EN-US style='font-size:10.0pt;color:blue'> <o:p></o:p></span></font></p>
<p style='margin-left:42.0pt'><font size=2 color=navy face=宋体><span \
lang=EN-US style='font-size:10.0pt;color:navy'>Cao Yipeng<br>
Development Dept.I<br>
Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST)<br>
8/F., Civil Defense Building, <st1:Street w:st="on"><st1:address w:st="on">No.189
Guangzhou Road</st1:address></st1:Street> ,<br>
<st1:City w:st="on">Nanjing</st1:City> , 210029, <st1:country-region \
w:st="on"><st1:place w:st="on">China</st1:place></st1:country-region> <br>
TEL: +86+25-86630566-817<br>
COINS: 79955-817<br>
FAX: +86+25-83317685<br>
MAIL: <a href="mailto:caoyp@cn.fujitsu.com">caoyp@cn.fujitsu.com</a></span></font><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span lang=EN-US
style='font-size:10.5pt'> </span><span lang=EN-US><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span \
lang=EN-US><o:p> </o:p></span></font></p>
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