PosterChild: Blend‐Aware Artistic Posterization

Posterization is an artistic effect which converts continuous images into regions of constant color with smooth boundaries, often with an artistically recolored palette. Artistic posterization is extremely time‐consuming and tedious. We introduce a blend‐aware algorithm for generating posterized ima...

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Bibliographic Details
Published in:Computer graphics forum Vol. 40; no. 4; pp. 87 - 99
Main Authors: Chao, Cheng‐Kang Ted, Singh, Karan, Gingold, Yotam
Format: Journal Article
Language:English
Published: Oxford Blackwell Publishing Ltd 01.07.2021
Subjects:
Algorithms
Applied computing → Fine arts
CCS Concepts
Color
Computing methodologies → Non‐photorealistic rendering; Image processing
Optimization
Smooth boundaries
ISSN:0167-7055, 1467-8659
Online Access:Get full text
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Summary:Posterization is an artistic effect which converts continuous images into regions of constant color with smooth boundaries, often with an artistically recolored palette. Artistic posterization is extremely time‐consuming and tedious. We introduce a blend‐aware algorithm for generating posterized images with palette‐based control for artistic recoloring. Our algorithm automatically extracts a palette and then uses multi‐label optimization to find blended‐color regions in terms of that palette. We smooth boundaries away from image details with frequency‐guided median filtering. We evaluate our algorithm with a comparative user study and showcase its ability to produce compelling posterizations of a variety of inputs. Our parameters provide artistic control and enable cohesive, real‐time recoloring after posterization pre‐processing.
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.14343