This is because an image can have a varying Blur Width (depth of field) and the subject which is to be in focus is usually in the center.

这是因为图像可能有不同的模糊边缘宽度（景深）和在该中心通常有需要聚焦的被摄物体。

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Discover how to animate virtual cameras, add realistic blur and depth of field, and create a new sense of dimension with light and shadow.

学习使用三维摄像机：添加模糊和景深，并创建一个新的光和阴影感觉。

youdao

Discover how to animate virtual cameras, add realistic blur and depth of field, and create a new sense of dimension with light and shadow.

学习使用三维摄像机：添加模糊和景深，并创建一个新的光和阴影感觉。

youdao