电子笔记本:一种从会议、报告及讲演的手机照片生成PPT的方法

智能手机已成为人们生活的有力助手，将手机拍摄的会议、报告以及演讲图像生 成 PPT 具有迫切的现实需求，方便人们有效快捷地浏览会议、报告及演讲内容。为此，提出了 一种从会议、报告及演讲的手机照片生成 PPT 方法，包括有效区域提取、内容区域重投影和补 全内容区域。有效区域提取用大核形态学操作处理图像，突出内容区域和背景区域的差异，便 于准确提取有效内容区域。基于角点约束恢复相机参数，以虚拟视角方式将内容区进行正投影。 内容区域补全用 inpainting 方法去除内容区域的遮挡物。在多种会议、报告及演讲场所的多种 情景测试了该算法，能够将会议、报告及演讲的手机照片生成 PPT。

Investigation on PPT Generation from Mobile Images Taken on Conference,Seminar and Presentation Scenario

Smartphones have become a powerful assistant to modern people in terms of taking pictures on the scenarios of conference, seminar and representation, but obtaining information based on these images is discrete, discontinuous, and easily interrupted. Therefore, a method of generating PPTs from mobile pictures is in urgent need, via which we can effectively browse the core content. The paper presents a PPT generation method from the mobile images taken on the scenario of meeting, seminar and representation, including effective region extraction, content area reprojection and content area completion. The effective region is extracted by using the morphological operation with large kernel, highlighting the difference between the content area and the background area, convenient for extracting the effective content area. Based on the corner constraint, the content area is virtually reprojected for generating the regular rectangular area. The content area completion is to remove the obstacles within the content area. In experiments of a variety of scenarios, the proposed method could effectively generate PPT from the images of conference, seminar and presentation.