  Existing deep interactive colorization models have focused on ways to utilize
various types of interactions, such as point-wise color hints, scribbles, or
natural-language texts, as methods to reflect a user's intent at runtime.
However, another approach, which actively informs the user of the most
effective regions to give hints for sketch image colorization, has been
under-explored. This paper proposes a novel model-guided deep interactive
colorization framework that reduces the required amount of user interactions,
by prioritizing the regions in a colorization model. Our method, called
GuidingPainter, prioritizes these regions where the model most needs a color
hint, rather than just relying on the user's manual decision on where to give a
color hint. In our extensive experiments, we show that our approach outperforms
existing interactive colorization methods in terms of the conventional metrics,
such as PSNR and FID, and reduces required amount of interactions.
