We present iPoster, an interactive layout generation framework that empowers users to guide content-aware poster layout design by specifying flexible constraints. iPoster enables users to specify partial intentions within the intention module, such as element categories, sizes, positions, or coarse initial drafts. Then, the generation module instantly generates refined, context-sensitive layouts that faithfully respect these constraints. iPoster employs a unified graph-enhanced diffusion architecture that supports various design tasks under user-specified constraints. These constraints are enforced through masking strategies that precisely preserve user input at every denoising step. A cross content-aware attention module aligns generated elements with salient regions of the canvas, ensuring visual coherence. Extensive experiments show that iPoster not only achieves state-of-the-art layout quality, but offers a responsive and controllable framework for poster layout design with constraints.

翻译：我们提出 iPoster，一种交互式布局生成框架，允许用户通过指定灵活约束来自主引导内容感知的海报布局设计。iPoster 使用户能在意图模块中指定部分设计意图（如元素类别、尺寸、位置或粗略初始草图），随后由生成模块即时生成符合约束的精细化、场景敏感布局。iPoster 采用统一的图增强扩散架构，支持在用户指定约束下完成多种设计任务，并通过掩码策略在每个去噪步骤中精确保留用户输入。交叉内容感知注意力模块可使生成元素与画布显著区域对齐，确保视觉连贯性。大量实验表明，iPoster 不仅实现了最先进的布局质量，还为用户提供了响应迅速、可控性强的约束化海报布局设计框架。