Photo by Gustave Le Gray Wiki “The idea of using several exposures to fix a too-extreme range of luminance was pioneered as early as the 1850s by Gustave Le Gray to render seascapes showing both the sky and the sea. Such rendering was impossible at the time using standard methods, the luminosity range being too extreme. Le Gray used one negative for the sky, and another one with a longer exposure for the sea, and combined the two into one picture in positive.” “用多个曝光修正一个太极端的亮度范围的想法早在19世纪50年代由Gustave Le Grey率先提出。图片同时展现天空和海洋的景色,这种亮度范围使用,当时的标准方法是不可能的,因为发光度范围太极端。 Gustave用一个负片表现天空和另一个负片长曝表现海 ,两张合并显影成像。” 为什么会出现HDR