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Manga Vectorization and Manipulation with Procedural Simple Screentone.

Chih-Yuan Yao, Shih-Hsuan Hung, Guo-Wei Li

IEEE Transactions on Visualization and Computer Graphics

|February 11, 2016

Summary

This study introduces a novel method for vectorizing scanned Manga, enabling interactive manipulation and high-resolution rendering. The system effectively converts Manga elements into a vector format for digital applications.

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Area of Science:

Computer Graphics
Digital Art
Image Processing

Background:

Manga's global popularity relies on distinct artistic elements like line drawing and screentone.
Digital reproduction of Manga often faces challenges in preserving detail and enabling manipulation.
Vectorization offers a solution for scalable and editable digital Manga content.

Purpose of the Study:

To develop a system for transforming scanned Manga into a vector representation.
To enable interactive manipulation and real-time, arbitrary-resolution rendering of Manga art.
To facilitate digital workflows for Manga creation and editing.

Main Methods:

Adaptive binarization and screentone detection to decompose Manga into elements.
Classification of screentones into simple and complex patterns for distinct processing.
A novel line tracer and curve-based refiner for accurate boundary detection and border polishing.
User-guided semantic component clustering using scribbles for mesh generation with Bézier curves.

Main Results:

Successful decomposition of Manga into rough elements, including borders and shading regions.
Vectorization of simple screentones for enhanced detail and rendering.
Vectorization of complex screentones using a proposed line tracer for precise shading.
Generation of shading meshes with embedded Bézier curves for unified manipulation.
Real-time, resolution-independent rendering of Manga elements with procedural and curve-based shaders.

Conclusions:

The proposed vectorization system enables artifact-free scaling and deformation of Manga art.
The system facilitates interactive manipulation, including pattern changes and lighting adjustments.
This approach significantly enhances the digital usability and creative potential of Manga.