In addition, you can think out of the box with this control, not just using it for gauges but using its simple graphics primitive language to build any type of image and simple animation.

此外，还可以想得更远一些，不仅可以将它用于仪表盘，而且还可以使用其简单的图形原语构建任何类型的图像和简单的动画。

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But those graphics tended to be a bit ugly, because PHP's image library is primitive and doesn't support effects.

但是这些图像往往很简陋，因为php图像库非常原始，不支持特效。

youdao

Perceptual grouping refers to the human visual ability to extract significant image relations from lower-level primitive image features without any knowledge of the image content.

感知归类是指人们在不拥有任何图像内容知识的前提下，从底层原始图像特征中提取有效的图像联系的一种视觉能力。

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