工作原理:图像稳定——电子稳像

“拍照时请保持静止。”

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摄影师这样指导他们的拍摄对象,如果他们在按下快门时手稍微移动,导致相机抖动,仍然可能得到模糊的图像。这个问题在使用数码相机和摄像机的人中非常普遍,尤其是在低光照条件下,快门必须保持打开更长时间,因此制造商正在推出图像稳定系统,以自动校正人为抖动。“行业正朝着更高像素、更小尺寸和更长变焦镜头的相机发展,这些镜头会放大抖动,”伊士曼柯达公司位于纽约州罗切斯特的数码相机高级开发经理 Jay Endsley 说。“所以我们正在尽一切努力来提高图像质量。”

数码相机采用两种不同的图像稳定硬件方案。一种系统移动镜头的一部分以偏转入射光,补偿抖动方向;另一种系统移动 CCD——捕获图像的传感器。 偏爱镜头方案的工程师表示,移动 CCD 会使拍摄清晰图像变得复杂,尤其是在使用闪光灯时。 CCD 方法的设计者指出,它适用于用户可能安装到相机的每个镜头,从而无需购买不同的镜头。

Mark Fischetti has been a senior editor at 大众科学 for 17 years and has covered sustainability issues, including climate, weather, environment, energy, food, water, biodiversity, population, and more. He assigns and edits feature articles, commentaries and news by journalists and scientists and also writes in those formats. He edits History, the magazine's department looking at science advances throughout time. He was founding managing editor of two spinoff magazines: 大众科学 Mind and 大众科学 Earth 3.0. His 2001 freelance article for the magazine, "Drowning New Orleans," predicted the widespread disaster that a storm like Hurricane Katrina would impose on the city. His video What Happens to Your Body after You Die?, has more than 12 million views on YouTube. Fischetti has written freelance articles for the New York Times, Sports Illustrated, Smithsonian, Technology Review, Fast Company, and many others. He co-authored the book Weaving the Web with Tim Berners-Lee, inventor of the World Wide Web, which tells the real story of how the Web was created. He also co-authored The New Killer Diseases with microbiologist Elinor Levy. Fischetti is a former managing editor of IEEE Spectrum Magazine and of Family Business Magazine. He has a physics degree and has twice served as the Attaway Fellow in Civic Culture at Centenary College of Louisiana, which awarded him an honorary doctorate. In 2021 he received the American Geophysical Union's Robert C. Cowen Award for Sustained Achievement in Science Journalism, which celebrates a career of outstanding reporting on the Earth and space sciences. He has appeared on NBC's Meet the Press, CNN, the History Channel, NPR News and many news radio stations. Follow Fischetti on X (formerly Twitter) @markfischetti

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大众科学 Magazine Vol 295 Issue 4This article was originally published with the title “Steady Cam” in 大众科学 Magazine Vol. 295 No. 4 ()
doi:10.1038/scientificamerican102006-3z2GFexvqHBMJU5CQNnM9r
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