With SVG, as with any vector graphics format, the description of the image content is based on listing the different shapes, rather than producing a pixel-by-pixel representation.

和其他任何向量图像格式一样，SVG也采用各种形状的列表来描述图像内容，而不是生成像素表示。

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For example, the PDF backend is vector-based where possible (only falling back to images when necessary), whereas the PostScript backend essentially generates one large image per page.

例如，pdf后端会尽可能使用矢量计算(只在必要时生成图像)，而PostScript后端实际上会为每个页面生成一个大图像。

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The paper presents a Support Vector Machine (SVM) based image denoising approach.

提出了一种基于支持向量机进行图像去噪的方法。

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