feMorphology-2.svg

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<svg xmlns="http://www.w3.org/2000/svg" width="500" height="500">

<filter id="f1" filterUnits="userSpaceOnUse" primitiveUnits="userSpaceOnUse">

  <feMorphology operator="erode" radius="20 20"/>

</filter>

<g filter="url(#f1)">

  <rect x="0" y="0" width="100" height="100" fill="#00ff00"/>

</g>

<filter id="f2" filterUnits="userSpaceOnUse" primitiveUnits="userSpaceOnUse">

  <feMorphology operator="erode" radius="30 40"/>

</filter>

<g filter="url(#f2)">

  <rect x="105" y="5" width="90" height="90" fill="#00ff00"/>

</g>

<filter id="f3" filterUnits="userSpaceOnUse" primitiveUnits="userSpaceOnUse">

  <feMorphology operator="dilate" radius="20 20"/>

</filter>

<g filter="url(#f3)">

  <rect x="0" y="100" width="100" height="100" fill="#00ff00"/>

  <rect x="10" y="110" width="80" height="80" fill="#000000"/>

</g>

<filter id="f4" filterUnits="userSpaceOnUse" primitiveUnits="userSpaceOnUse">

  <feMorphology operator="dilate" radius="20 30"/>

</filter>

<g filter="url(#f4)">

  <rect x="145" y="145" width="10" height="10" fill="#00ff00"/>

</g>

</svg>