Palette-Based and Harmony-Guided Colorization for Vector Icons

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Date
2023
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Journal ISSN
Volume Title
Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
Colorizing icon is a challenging task, even for skillful artists, as it involves balancing aesthetics and practical considerations. Prior works have primarily focused on colorizing pixel-based icons, which do not seamlessly integrate into the current vectorbased icon design workflow. In this paper, we propose a palette-based colorization algorithm for vector icons without the need for rasterization. Our algorithm takes a vector icon and a five-color palette as input and generates various colorized results for designers to choose from. Inspired by the common icon design workflow, we developed our algorithm to consist of two steps: generating a colorization template and performing the palette-based color transfer. To generate the colorization templates, we introduce a novel vector icon colorization model that employs an MRF-based loss and a color harmony loss. The color harmony loss encourages the alignment of the resulting color template with widely used harmony templates. We then map the predicted colorization template to chroma-like palette colors to obtain diverse colorization results. We compare our results with those generated by previous pixel-based icon colorization methods and validate the effectiveness of our algorithm by evaluations in both qualitative and quantitative measurements. Our method enables icon designers to explore diverse colorization results for a single icon using different color palettes while also efficiently evaluating the suitability of a color palette for a set of icons.
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@article{
10.1111:cgf.14950
, journal = {Computer Graphics Forum}, title = {{
Palette-Based and Harmony-Guided Colorization for Vector Icons
}}, author = {
Lin, Miao
and
Shen, I-Chao
and
Chin, Hsiao-Yuan
and
Chen, Ruo-Xi
and
Chen, Bing-Yu
}, year = {
2023
}, publisher = {
The Eurographics Association and John Wiley & Sons Ltd.
}, ISSN = {
1467-8659
}, DOI = {
10.1111/cgf.14950
} }
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