Efficient digitization of printed color maps

Hoi Wo Yeung; Yiu Sang Moon; Sarah Yung

doi:10.1117/12.586118

17 January 2005 Efficient digitization of printed color maps

Hoi Wo Yeung, Yiu Sang Moon, Sarah Yung

Proceedings Volume 5667, Color Imaging X: Processing, Hardcopy, and Applications; (2005) https://doi.org/10.1117/12.586118
Event: Electronic Imaging 2005, 2005, San Jose, California, United States

Abstract

The importance of digital maps increases continuously. Unfortunately, it is costly and time consuming to create a digital map out of the void. If we can successfully vectorize scanned paper maps, digital map production will be much easier and previous map resources can be well utilized. The first step of map vectorization is color clustering. Currently there exist a number of fast and efficient algorithms for automatic color clustering. However, they may not work well for maps of enormous noises. Here we introduce two interactive color clustering algorithms: color clustering with pre-calculated index colors (PCIC) and color clustering with pre-calculated color ranges (PCCR). A number of experiments are conducted to investigate into the performance of the two approaches. Finally, we introduce a novel and efficient vectorization algorithm, which can perform the entire vectorization algorithm in one pass of linear time.

Citation Download Citation

Hoi Wo Yeung, Yiu Sang Moon, and Sarah Yung "Efficient digitization of printed color maps", Proc. SPIE 5667, Color Imaging X: Processing, Hardcopy, and Applications, (17 January 2005); https://doi.org/10.1117/12.586118

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