我想创建一个包含图像的圆圈，我已经尝试使用pattern or filter但他们都没有给我预期的结果。下面是代码：
<svg id="graph" width="100%" height="400px">
<!-- filter -->
<filter id = "born1" x = "0%" y = "0%" width = "100%" height = "100%">
<feImage xlink:href = "https://cdn3.iconfinder.com/data/icons/people-professions/512/Baby-512.png"/>
</filter>
<circle id = "born" class = "medium" cx = "5%" cy = "20%" r = "5%" fill = "white" stroke = "lightblue" stroke-width = "0.5%" filter = "url(#born1)"/>
<!-- pattern -->
<defs>
<pattern id="image" x="0" y="0" height="100%" width="100%">
<image x="0" y="0" xlink:href="https://cdn3.iconfinder.com/data/icons/people-professions/512/Baby-512.png"></image>
</pattern>
</defs>
<circle id = "sd" class = "medium" cx = "5%" cy = "40%" r = "5%" fill = "white" stroke = "lightblue" stroke-width = "0.5%" fill="url(#image)"/>
</svg>
我的目标是保留圆圈并在其中提供背景图像，例如 CSS attrbackground-image.
一个模式将会发挥作用。你只需要给出<image>一个尺寸。与 HTML 不同，SVG 图像的宽度和高度默认为零。
另外，如果您希望图像随圆缩放，那么您应该指定viewBox对于模式。
<svg id="graph" width="100%" height="400px">
<!-- pattern -->
<defs>
<pattern id="image" x="0%" y="0%" height="100%" width="100%"
viewBox="0 0 512 512">
<image x="0%" y="0%" width="512" height="512" xlink:href="https://cdn3.iconfinder.com/data/icons/people-professions/512/Baby-512.png"></image>
</pattern>
</defs>
<circle id="sd" class="medium" cx="5%" cy="40%" r="5%" fill="url(#image)" stroke="lightblue" stroke-width="0.5%" />
</svg>
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