Project 1 - Austin Leung

Project Overview

In this project, we used black and white photos taken with red, green, and blue filters taken from the Prokudin-Gorskii digital library. We then aligned the different filtered images, and recreated a color image. To find the best alignment, we compared the pixels and found the alignment that had the fewest differences between pixels, using normalized cross-correlation (ncc) as a metric. For some of the larger images, we had to implement image pyramid, which takes roughly 90 seconds per image on my computer. There were still some issues with alignment, so I manually cropped out 10 percent of the edges when measuring the ncc. Also, the picture of Emir of Bukhara didn't quite align due to his bright blue robe. As a result, I had to align the red filter with the green instead of the blue filter.

Example Images

More Images From The Prokudin-Gorskii Collection

Miscellaneous

Note: the monument image has an image of a boy leaning against a wall in the green filter, but he is absent in the other two filters. As a result it may look like a discoloration/misalignment, but that is not the case!