Online learning and academic conferences have become pervasive and essential for education and professional development, especially since the onset of pandemics. Academic presentations usually require well-designed slides that are easily understood. Sketches that visually represent design intentions and are readily accessible to the average users. To assist non-expert users in creating visually appealing academic slides, we propose DualSlide, a global and local two-stage sketching interface system that provides image retrieval and user guidance. At the global stage, DualSlide provides a heat map canvas to display the distribution of all slide layouts in a dataset, allowing users to explore the reference slides efficiently. At the local stage of the system, detailed references and guidance for designing slide content, such as diagrams and fonts, can be provided. We further propose a sketch-matching algorithm to compare the user's input sketch and similar diagrams. All user guidance can be adapted in real-time editing, and users can design slides with a high degree of freedom. We conducted a user study to verify the effectiveness and usability of the proposed DualSlide system confirming that DualSlide provides high retrieval accuracy and satisfactory design results with a good user experience. Video: https://youtu.be/lUI1zjxCdM0

翻译：在线学习和学术会议已成为教育和职业发展中普遍且不可或缺的组成部分，尤其是在疫情爆发以来。学术演讲通常需要设计精良、易于理解的幻灯片。草图能够直观表达设计意图，且便于普通用户使用。为帮助非专业用户创建视觉吸引力强的学术幻灯片，我们提出DualSlide，一种全局与局部两阶段草图界面系统，提供图像检索与用户引导功能。在全局阶段，DualSlide通过热力图画布展示数据集中所有幻灯片版式的分布，使用户能够高效浏览参考幻灯片。在系统的局部阶段，可提供针对幻灯片内容（如图表和字体）设计的详细参考与引导。我们进一步提出一种草图匹配算法，用于比较用户输入草图与相似图表。所有用户引导均可进行实时编辑调整，用户能够以高度自由的方式设计幻灯片。我们通过用户研究验证了DualSlide系统的有效性与可用性，结果表明DualSlide具有高检索精度、令人满意的设计效果以及良好的用户体验。视频链接：https://youtu.be/lUI1zjxCdM0