台灣電腦科學家馬萬鈞。相片:中通社

一名來自台灣的軟件工程師因其開創性的面部數字化技術而獲得了美國電影藝術學院(Academy of Motion Picture Arts and Sciences)的認可,該技術給一系列好萊塢科幻大片帶來令人腎上腺素飆升的視覺效果,讓全球觀眾驚歎不已。

馬萬鈞(Ma Wan-chun)是谷歌的工程師,他和同事們本月在第91屆奧斯卡頒獎典禮上獲得了「科學技術成就奬」(the Scientific and Technical Achievement Award),以表彰他們在南加州大學創意技術研究所(University of Southern California’s Institute for Creative Technologies)開發的計算機圖形技術。

馬萬鈞在2008年《班傑明的奇幻旅程》(The Curious Case of Benjamin Button)中塑造了老年版的Brad Pitt形象,又在2009將《阿凡達》(Avatar)的Na’vi部落帶上了大銀幕,在2015年的《狂野時速7》(中國內地稱《速度與激情》,台灣稱《玩命關頭7》)中,由於在拍攝中期演員意外身亡,而利用該技術重新創建了Paul Walker這一角色。

「基於球體上的偏振漸層光源」是一種使用名為Light Stage X的圓頂形物體來進行的面部表情捕捉算法。當一個演員在其內部演出時,他被大約300個LED(發光二極管)照亮,以便從不同角度捕捉和分析他的外表和姿勢。

據馬萬鈞介紹,這些鏡頭然後被轉換成三維模型,用於視覺效果計算和渲染,使計算機能夠理解演員臉部的幾何形狀、毛孔紋理和光線特性。

該技術是電影行業在製作特殊視覺效果時,對於面部捕捉的重大突破,能夠以亞毫米的精度捕捉演員臉部的形狀和反射,從而忠實地再現角色的面部。Light Stage X結構是所有後續創新的基礎,也是該方法向生產系統演變的基石。

馬萬鈞告訴台灣媒體,他一直對電影和電子遊戲中的視覺效果著迷,比如《星球大戰》(Star Wars)系列中的各種外星人物,以及1994年的遊戲《銀河飛將3》(Wing Commander 3)中,真實演員和動畫背景的結合。

在21世紀初,計算機圖形學領域剛剛在台灣始創,馬萬鈞利用台灣研究生留學項目的獎學金繼續在此領域深造。他說,他不只是為他的博士論文做研究,而是想把他的專業知識付諸實踐,南加州大學的工作正好幫助他「將夢想照進現實」。

他的團隊的下一步是通過將技術應用於增強現實(AR)和虛擬現實(VR)領域,將電影院中呈現的逼真視覺效果帶到智能手機上。

原文:Hollywood honors Taiwanese computer genius
更多:https://www.asiatimes.com/lang/chinese/
相片:Central News Agency, Taiwan

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