Based on the study of the theories and key points of the Depth from Focus (DFF), a 3D reconstruction method of tool wear area has been designed. And a 3D visualization software of tool wear area was developed.
本文在深入研究聚焦合成理论、方法及关键技术的基础上,设计出了基于聚焦合成的刀具磨损区域三维重构的方法,并开发了三维刀具磨损区域可视化软件。
参考来源 - 刀具磨损区域的三维重构技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
To borrow a term from the visual arts, Franzen's writing has an enviable depth of field: it keeps a great deal in focus simultaneously.
借用视觉艺术中的一个术语，弗兰岑的小说有一种令人艳羡的视角深度：它同时关注许多方面。
But at 5km (3 miles) down, its focus was at half the depth—and the epicentre a mere 10km from the city compared with 30km last time.
但是震源仅仅距地面5千米，是上次的一半，距离震中仅仅10千米，而上次则是30千米。
Telocentric lenses work with a wide depth of field. with a telocentric lens, you can image objects of different distances from the lens and the objects stay in focus.
具端著丝粒的镜头(注：我猜是类似于针孔镜头吧)具有宽阔之景深，以具端著丝粒的镜头，你能够将由镜头不同距离之目标物成像和保持目标物在焦。
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