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arxiv:2507.01945

LongAnimation: Long Animation Generation with Dynamic Global-Local Memory

Published on Jul 2
· Submitted by CNcreator0331 on Jul 3
#2 Paper of the day
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Abstract

LongAnimation proposes a framework combining SketchDiT, Dynamic Global-Local Memory, and Color Consistency Reward to achieve dynamic and consistent colorization across extended animation sequences.

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Animation colorization is a crucial part of real animation industry production. Long animation colorization has high labor costs. Therefore, automated long animation colorization based on the video generation model has significant research value. Existing studies are limited to short-term colorization. These studies adopt a local paradigm, fusing overlapping features to achieve smooth transitions between local segments. However, the local paradigm neglects global information, failing to maintain long-term color consistency. In this study, we argue that ideal long-term color consistency can be achieved through a dynamic global-local paradigm, i.e., dynamically extracting global color-consistent features relevant to the current generation. Specifically, we propose LongAnimation, a novel framework, which mainly includes a SketchDiT, a Dynamic Global-Local Memory (DGLM), and a Color Consistency Reward. The SketchDiT captures hybrid reference features to support the DGLM module. The DGLM module employs a long video understanding model to dynamically compress global historical features and adaptively fuse them with the current generation features. To refine the color consistency, we introduce a Color Consistency Reward. During inference, we propose a color consistency fusion to smooth the video segment transition. Extensive experiments on both short-term (14 frames) and long-term (average 500 frames) animations show the effectiveness of LongAnimation in maintaining short-term and long-term color consistency for open-domain animation colorization task. The code can be found at https://cn-makers.github.io/long_animation_web/.

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edited 1 day ago

Super cool project that focus on automate the long animation creation, which has been accepted by ICCV.

Very good work, can you post the link to your bilibili page?

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