函数
>
图像处理
>
图像的组合
> 示例：替换图像的一部分
示例：替换图像的一部分
使用函数
putregion
可将矩阵
N
插入到矩阵
M
的
(row, col)
处。在给定位置进行插入时，矩阵
M
必须足够大，以包含所有
N
。
有关使用此示例的信息，请参考
关于图像处理示例
。
1.
读入起始图像。
<region id="ID0EV5KY" top="144" left="24" width="196.246666666667" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <define xmlns="http://schemas.mathsoft.com/math50"> <id label="None">R</id> <apply> <id>READ_IMAGE</id> <str xml:space="preserve">camera.bmp</str> </apply> </define> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
<region id="ID0ED6KY" top="168" left="24" width="88.5783333333333" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <eval xmlns="http://schemas.mathsoft.com/math50"> <apply> <id>rows</id> <id>R</id> </apply> <result> <real>256</real> </result> </eval> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
<region id="ID0ER6KY" top="168" left="144" width="83.4416666666667" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <eval xmlns="http://schemas.mathsoft.com/math50"> <apply> <id>cols</id> <id>R</id> </apply> <result> <real>256</real> </result> </eval> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
2.
创建另外一个图像，该图像比第一个图像小。
<region id="ID0EBBLY" top="240" left="24" width="340.846666666667" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <define xmlns="http://schemas.mathsoft.com/math50"> <id label="None">N</id> <apply> <id>submatrix</id> <sequence> <apply> <id>READ_IMAGE</id> <str xml:space="preserve">mona.bmp</str> </apply> <real>70</real> <real>100</real> <real>60</real> <real>140</real> </sequence> </apply> </define> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
<region id="ID0EPBLY" top="264" left="24" width="54.06" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <define xmlns="http://schemas.mathsoft.com/math50"> <id label="None">col</id> <real>170</real> </define> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
<region id="ID0E4BLY" top="288" left="24" width="53.2133333333333" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <define xmlns="http://schemas.mathsoft.com/math50"> <id label="None">row</id> <real>90</real> </define> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
<region id="ID0ELCLY" top="312" left="24" width="78.285" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <eval xmlns="http://schemas.mathsoft.com/math50"> <apply> <id>cols</id> <id>N</id> </apply> <result> <real>81</real> </result> </eval> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
<region id="ID0EZCLY" top="336" left="24" width="83.4216666666667" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <eval xmlns="http://schemas.mathsoft.com/math50"> <apply> <id>rows</id> <id>N</id> </apply> <result> <real>31</real> </result> </eval> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
请确保
<region id="ID0EKDLY" top="408" left="24" width="128.798333333333" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <eval xmlns="http://schemas.mathsoft.com/math50"> <apply> <minus /> <apply> <plus /> <id>col</id> <apply> <id>cols</id> <id>N</id> </apply> </apply> <real>1</real> </apply> <result> <real>250</real> </result> </eval> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
小于
<region id="ID0ETDLY" top="408" left="264" width="83.4416666666667" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <eval xmlns="http://schemas.mathsoft.com/math50"> <apply> <id>cols</id> <id>R</id> </apply> <result> <real>256</real> </result> </eval> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
<region id="ID0E6DLY" top="432" left="24" width="139.071666666667" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <eval xmlns="http://schemas.mathsoft.com/math50"> <apply> <minus /> <apply> <plus /> <id>row</id> <apply> <id>rows</id> <id>N</id> </apply> </apply> <real>1</real> </apply> <result> <real>120</real> </result> </eval> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
小于
<region id="ID0EIELY" top="432" left="264" width="88.5783333333333" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <eval xmlns="http://schemas.mathsoft.com/math50"> <apply> <id>rows</id> <id>R</id> </apply> <result> <real>256</real> </result> </eval> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
3.
将矩阵
N
插入到
M
中并查看得到的图像：
<region id="ID0E6FLY" top="504" left="24" width="165.43" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <define xmlns="http://schemas.mathsoft.com/math50"> <id label="None">C</id> <apply> <id>putregion</id> <sequence> <id>R</id> <id>N</id> <id>row</id> <id>col</id> </sequence> </apply> </define> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
<region id="ID0ENGLY" top="528" left="24" width="292.903333333333" height="21.2" xmlns="http://schemas.mathsoft.com/worksheet50"> <math> <define xmlns="http://schemas.mathsoft.com/math50"> <id label="None">DummyC</id> <apply> <id>WRITEBMP</id> <sequence> <str xml:space="preserve">mona_in_camera.bmp</str> <id>C</id> </sequence> </apply> </define> <resultFormat> <decimal precision="round-trip-decimal-places" show-trailing-zeros="false" radix="dec" imaginary-value="i" /> <matrix size="12,12" offset="0,0" /> </resultFormat> </math> </region>
(camera.bmp)
(mona_in_camera.bmp)
复制表达式
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替换图像的一部分
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