Considering the image contrast as a measurement of the degree of the image focus, a novel autofocus algorithm for Synthetic Aperture Radar (SAR) imagery is presented in this paper.

以对比度作为衡量图像聚焦程度的标准，研究了一种新颖的SAR图像自聚焦算法。

youdao

There are different ways to breathe to relax. The methods described here focus only on breathing exercises. Other ways combine breathing with things like yoga, imagery, and meditation.

呼吸来放松有有不同的方法。本文描述的方法着重于呼吸练习。其它的方法有将呼吸和瑜伽、想象和冥思结合起来。

youdao

The Visual system that shows imagery of the outside world to the pilots should be generally designed so that the imagery appears at a distant focus.

还应设计视景系统，将外界景象呈现给驾驶员，使景象出现在远处焦点。

youdao

By combining monochromatic and color images to sharpen the focus of the satellite imagery, the science teams were able to then differentiate between birds, guano and shadow.

WSJ: Emperor Penguins Aplenty in Antarctica

Obviously we're using a lot of satellite imagery these days, and this is going to be a major focus of some of the work NASA is doing here at home, thinking about how we can get better information about our own climate.

WHITEHOUSE: President Obama's call to the International Space Station