如何将 SVG 中的 feGaussianBlur 转换为 JavaFX 中的 GaussianBlur 效果？

Posted 2023-03-28

【中文标题】如何将 SVG 中的 feGaussianBlur 转换为 JavaFX 中的 GaussianBlur 效果？

【英文标题】：How to convert a feGaussianBlur in SVG to a GaussianBlur effect in JavaFX?

【发布时间】：2021-12-20 20:24:00

【问题描述】：

我正在开发一个库 (fxsvgimage)，用于在 JavaFX 中显示 SVG 图像。我在实现过滤器的过程中，我有一个关于 feGaussianBlur 过滤器的问题：是否可以将 feGaussianBlur 的stdDeviation 参数可靠地转换为 GaussianBlur 效果的radius 参数？

似乎如果我使用相同的值，JavaFX 中的结果比 SVG 中的模糊度要低。例如，如果我使用这个 svg 图片：

<svg id="Layer_1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 156.364 147.239">
   <filter id="blur-shadow">
      <feGaussianBlur stdDeviation="3" />
   </filter>   
   <style>.st0fill:#DEDEDE; .st1fill:#3E295E; .st2fill:#FFFFFF; .st3fill:#429946; .st4fill:#F5EB30;</style>
   <g filter="url(#blur-shadow)">
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   </g>

</svg>

stdDeviation 为 3，我在 SVG 中有这个：

这在 JavaFX 中通过使用 radius 的相同值：

【问题讨论】：

见Gaussian Blur—Standard Deviation, Radius and Kernel Size。

【参考方案1】：

尝试将您的半径设置为2 * stdDeviation。两者之间的关系通常是这样的。希望 JavaFX 也遵循该规则。

【讨论】：

谢谢，好多了！