Non-Photorealistic Computer Graphics Library

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Found 3 item(s) authored by "Dani Lischinski" Find Author on Google.

Technical Report A Resolution-Independent Representation for Pen-and-Ink Illustrations
Michael P. Salisbury, Corin Anderson, Dani Lischinski, David H. Salesin.
Department of Computer Science and Engineering, University of Washington, No. UW-CSE-96-01-02, 1996. [BibTeX]

Proceedings Colorization by Example

Author(s): Revital Irony, Daniel Cohen-Or, Dani Lischinski.
Proceedings: Proceedings of Eurographics Symposium on Rendering (EGSR'05), pp. 201--210, Konstanz, Germany, June 29 - July 1, 2005.
[BibTeX] Find this paper on Google

We present a new method for colorizing grayscale images by transferring color from a segmented example image. Rather than relying on a series of independent pixel-level decisions, we develop a new strategy that attempts to account for the higher-level context of each pixel. The colorizations generated by our approach exhibit a much higher degree of spatial consistency, compared to previous automatic color transfer methods [WAM02]. We also demonstrate that our method requires considerably less manual effort than previous user-assisted colorization methods [LLW04]. Given a grayscale image to colorize, we first determine for each pixel which example segment it should learn its color from. This is done automatically using a robust supervised classification scheme that analyzes the low-level feature space defined by small neighborhoods of pixels in the example image. Next, each pixel is assigned a color from the appropriate region using a neighborhood matching metric, combined with spatial filtering for improved spatial coherence. Each color assignment is associated with a confidence value, and pixels with a sufficiently high confidence level are provided as "micro-scribbles" to the optimization-based colorization algorithm of Levin et al. [LLW04], which produces the final complete colorization of the image.

Proceedings Scale-dependent reproduction of pen-and-ink illustrations
Michael P. Salisbury, Corin Anderson, Dani Lischinski, David H. Salesin.
Proceedings of the 23rd annual conference on Computer graphics and interactive techniques, pp. 461--468, 1996. [BibTeX]

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