Colonization is a computer-assisted process of adding color to a monochrome image or movie. The process typically involves segmenting images into regions and tracking these regions across image sequences. Neither of these tasks can be performed reliably in practice; consequently, colonization requires considerable user intervention and remains a tedious, time-consuming, and expensive task. In this paper we present a simple colorization method that requires neither precise image segmentation, nor accurate region tracking. Our method is based on a simple premise: neighboring pixels in space-time that have similar intensities should have similar colors. We formalize this premise using a quadratic cost function and obtain an optimization problem that can be solved efficiently using standard techniques. In our approach an artist only needs to annotate the image with a few color scribbles, and the indicated colors are automatically propagated in both space and time to produce a fully colorized image or sequence. We demonstrate that high quality colorizations of stills and movie clips may be obtained from a relatively modest amount of user input.
|Original language||American English|
|Number of pages||6|
|Journal||ACM Transactions on Graphics|
|State||Published - 2004|
|Event||ACM Transactions on Graphics - Proceedings of ACM SIGGRAPH 2004 - |
Duration: 9 Aug 2004 → 12 Aug 2004