What is Sergey Mikhaylovich Prokudin-Gorsky best known for?
Sergey Prokudin-Gorsky
When the three color-filtered photographs were not taken at the same time, anything in the scene that did not hold steady during the entire operation would exhibit colored "fringes" around its edges in the resulting color image. If it moved continuously across the scene, three separate strongly-colored "ghost" images could result. Such color artifacts are plainly visible in ordinary color composites of many of Prokudin-Gorsky's photographs, but special digital image processing software was used to artificially remove them, whenever possible, from the composites of all 1,902 of the images commissioned by the Library of Congress in 2004.[14] The altered versions have proliferated online and older or third-party versions showing these tell-tale peculiarities are increasingly scarce.[15]