工作原理:影像穩定——電子穩像

“拍照時請保持靜止。”

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攝影師這樣指導他們的拍攝物件,如果他們在按下快門時手稍微移動,導致相機抖動,仍然可能得到模糊的影像。這個問題在使用數碼相機和攝像機的人中非常普遍,尤其是在低光照條件下,快門必須保持開啟更長時間,因此製造商正在推出影像穩定系統,以自動校正人為抖動。“行業正朝著更高畫素、更小尺寸和更長變焦鏡頭的相機發展,這些鏡頭會放大抖動,”伊士曼柯達公司位於紐約州羅切斯特的數碼相機高階開發經理 Jay Endsley 說。“所以我們正在盡一切努力來提高影像質量。”

數碼相機採用兩種不同的影像穩定硬體方案。一種系統移動鏡頭的一部分以偏轉入射光,補償抖動方向;另一種系統移動 CCD——捕獲影像的感測器。 偏愛鏡頭方案的工程師表示,移動 CCD 會使拍攝清晰影像變得複雜,尤其是在使用閃光燈時。 CCD 方法的設計者指出,它適用於使用者可能安裝到相機的每個鏡頭,從而無需購買不同的鏡頭。

Mark Fischetti has been a senior editor at 大眾科學 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: 大眾科學 Mind and 大眾科學 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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大眾科學 Magazine Vol 295 Issue 4This article was originally published with the title “Steady Cam” in 大眾科學 Magazine Vol. 295 No. 4 ()
doi:10.1038/scientificamerican102006-3z2GFexvqHBMJU5CQNnM9r
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