函數
>
圖像處理
>
迴旋積分與濾波器
>
範例：平滑法
範例：平滑法
使用
centsmooth
函數可透過下列平滑核執行輸入圖像的迴旋積分：
<region id="ID0ECBP2" top="168" left="24" xml:lang="zh_TW" height="53.012" width="101.12" xmlns="http://schemas.mathsoft.com/worksheet50"> <math xml:lang="zh_TW"> <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50"> <id xml:lang="zh_TW" label="None">K</id> <apply xml:lang="zh_TW"> <mult xml:lang="zh_TW" /> <apply xml:lang="zh_TW"> <div xml:lang="zh_TW" /> <real xml:lang="zh_TW">1</real> <real xml:lang="zh_TW">10</real> </apply> <matrix rows="3" cols="3" xml:lang="zh_TW"> <real xml:lang="zh_TW">1</real> <real xml:lang="zh_TW">1</real> <real xml:lang="zh_TW">1</real> <real xml:lang="zh_TW">1</real> <real xml:lang="zh_TW">2</real> <real xml:lang="zh_TW">1</real> <real xml:lang="zh_TW">1</real> <real xml:lang="zh_TW">1</real> <real xml:lang="zh_TW">1</real> </matrix> </apply> </define> <resultFormat xml:lang="zh_TW"> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" xml:lang="zh_TW" /> <matrix size="12,12" offset="0,0" xml:lang="zh_TW" /> </resultFormat> </math> </region>
此核加權中心像素，以維持圖像特徵。
如需使用此範例的資訊，請參閱
＜關於圖像處理範例＞
。
1.
讀取圖像：
<region id="ID0EWDP2" top="288" left="24" xml:lang="zh_TW" height="21.2" width="196.83" xmlns="http://schemas.mathsoft.com/worksheet50"> <math xml:lang="zh_TW"> <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50"> <id xml:lang="zh_TW" label="None">R</id> <apply xml:lang="zh_TW"> <id xml:lang="zh_TW">READ_IMAGE</id> <str xml:space="preserve" xml:lang="zh_TW">pattern.bmp</str> </apply> </define> <resultFormat xml:lang="zh_TW"> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" xml:lang="zh_TW" /> <matrix size="12,12" offset="0,0" xml:lang="zh_TW" /> </resultFormat> </math> </region>
(pattern.bmp)
2.
將雜訊加入圖像：
<region id="ID0E5FP2" top="504" left="24" xml:lang="zh_TW" height="21.2" width="158.453333333333" xmlns="http://schemas.mathsoft.com/worksheet50"> <math xml:lang="zh_TW"> <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50"> <id xml:lang="zh_TW" label="None">RN</id> <apply xml:lang="zh_TW"> <id xml:lang="zh_TW">addnoise</id> <sequence xml:lang="zh_TW"> <id xml:lang="zh_TW">R</id> <real xml:lang="zh_TW">0.01</real> <real xml:lang="zh_TW">150</real> </sequence> </apply> </define> <resultFormat xml:lang="zh_TW"> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" xml:lang="zh_TW" /> <matrix size="12,12" offset="0,0" xml:lang="zh_TW" /> </resultFormat> </math> </region>
<region id="ID0EQGP2" top="528" left="24" xml:lang="zh_TW" height="21.2" width="280.29" xmlns="http://schemas.mathsoft.com/worksheet50"> <math xml:lang="zh_TW"> <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50"> <id xml:lang="zh_TW" label="None">Dummy_an</id> <apply xml:lang="zh_TW"> <id xml:lang="zh_TW">WRITEBMP</id> <sequence xml:lang="zh_TW"> <str xml:space="preserve" xml:lang="zh_TW">pattern_an.bmp</str> <id xml:lang="zh_TW">RN</id> </sequence> </apply> </define> <resultFormat xml:lang="zh_TW"> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" xml:lang="zh_TW" /> <matrix size="12,12" offset="0,0" xml:lang="zh_TW" /> </resultFormat> </math> </region>
(pattern_an.bmp)
3.
核對雜訊圖像的模糊程度是否隨每次應用
centsmooth
函數而增加：
<region id="ID0EEKP2" top="744" left="24" xml:lang="zh_TW" height="21.2" width="142.056666666667" xmlns="http://schemas.mathsoft.com/worksheet50"> <math xml:lang="zh_TW"> <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50"> <id xml:lang="zh_TW" label="None">RNC1</id> <apply xml:lang="zh_TW"> <id xml:lang="zh_TW">centsmooth</id> <id xml:lang="zh_TW">RN</id> </apply> </define> <resultFormat xml:lang="zh_TW"> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" xml:lang="zh_TW" /> <matrix size="12,12" offset="0,0" xml:lang="zh_TW" /> </resultFormat> </math> </region>
<region id="ID0EWKP2" top="768" left="24" xml:lang="zh_TW" height="21.2" width="306.786666666667" xmlns="http://schemas.mathsoft.com/worksheet50"> <math xml:lang="zh_TW"> <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50"> <id xml:lang="zh_TW" label="None">Dummy_an1</id> <apply xml:lang="zh_TW"> <id xml:lang="zh_TW">WRITEBMP</id> <sequence xml:lang="zh_TW"> <str xml:space="preserve" xml:lang="zh_TW">pattern_an1.bmp</str> <id xml:lang="zh_TW">RNC1</id> </sequence> </apply> </define> <resultFormat xml:lang="zh_TW"> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" xml:lang="zh_TW" /> <matrix size="12,12" offset="0,0" xml:lang="zh_TW" /> </resultFormat> </math> </region>
(pattern_an1.bmp)
<region id="ID0EMMP2" top="816" left="24" xml:lang="zh_TW" height="21.2" width="156.586666666667" xmlns="http://schemas.mathsoft.com/worksheet50"> <math xml:lang="zh_TW"> <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50"> <id xml:lang="zh_TW" label="None">RNC2</id> <apply xml:lang="zh_TW"> <id xml:lang="zh_TW">centsmooth</id> <id xml:lang="zh_TW">RNC1</id> </apply> </define> <resultFormat xml:lang="zh_TW"> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" xml:lang="zh_TW" /> <matrix size="12,12" offset="0,0" xml:lang="zh_TW" /> </resultFormat> </math> </region>
<region id="ID0E5MP2" top="840" left="24" xml:lang="zh_TW" height="21.2" width="306.786666666667" xmlns="http://schemas.mathsoft.com/worksheet50"> <math xml:lang="zh_TW"> <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50"> <id xml:lang="zh_TW" label="None">Dummy_an2</id> <apply xml:lang="zh_TW"> <id xml:lang="zh_TW">WRITEBMP</id> <sequence xml:lang="zh_TW"> <str xml:space="preserve" xml:lang="zh_TW">pattern_an2.bmp</str> <id xml:lang="zh_TW">RNC2</id> </sequence> </apply> </define> <resultFormat xml:lang="zh_TW"> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" xml:lang="zh_TW" /> <matrix size="12,12" offset="0,0" xml:lang="zh_TW" /> </resultFormat> </math> </region>
(pattern_an2.bmp)
<region id="ID0ETOP2" top="888" left="24" xml:lang="zh_TW" height="21.2" width="156.586666666667" xmlns="http://schemas.mathsoft.com/worksheet50"> <math xml:lang="zh_TW"> <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50"> <id xml:lang="zh_TW" label="None">RNC3</id> <apply xml:lang="zh_TW"> <id xml:lang="zh_TW">centsmooth</id> <id xml:lang="zh_TW">RNC2</id> </apply> </define> <resultFormat xml:lang="zh_TW"> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" xml:lang="zh_TW" /> <matrix size="12,12" offset="0,0" xml:lang="zh_TW" /> </resultFormat> </math> </region>
<region id="ID0EFPP2" top="912" left="24" xml:lang="zh_TW" height="21.2" width="306.786666666667" xmlns="http://schemas.mathsoft.com/worksheet50"> <math xml:lang="zh_TW"> <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50"> <id xml:lang="zh_TW" label="None">Dummy_an3</id> <apply xml:lang="zh_TW"> <id xml:lang="zh_TW">WRITEBMP</id> <sequence xml:lang="zh_TW"> <str xml:space="preserve" xml:lang="zh_TW">pattern_an3.bmp</str> <id xml:lang="zh_TW">RNC3</id> </sequence> </apply> </define> <resultFormat xml:lang="zh_TW"> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" xml:lang="zh_TW" /> <matrix size="12,12" offset="0,0" xml:lang="zh_TW" /> </resultFormat> </math> </region>
(pattern_an3.bmp)
您可使用
convolve
函數，設計並嘗試自己的平滑濾波器。
複製運算式
