High-resolution video mosaicing for documents and photos by estimating camera motion
High-resolution video mosaicing for documents and photos by estimating camera motion
复制标题
通过估计相机运动对文档和照片进行高分辨率视频拼接
DOI：
10.1117/12.526510
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Keiji Yamada
中科院分区：
文献类型：
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作者：
Tomokazu Sato;Sei Ikeda;M. Kanbara;A. Iketani;N. Nakajima;N. Yokoya;Keiji Yamada
近年来，纸张上的文件和照片数字化对于数字存档和通过互联网传输个人数据非常重要。虽然许多人希望在纸上轻松地数字化文档，但现在需要笨重的大型图像扫描仪来获得高质量的数字化。为了实现文档和照片的简单、高质量的数字化，我们提出了一种利用手持相机拍摄的电影进行数字化的新方法。该方法首先通过自动跟踪图像特征，估计每帧移动相机的6自由度位置和姿态参数；接下来，检测和拼接图像序列中重复出现的特征点，以最小化累积估计误差。最后，利用优化后的参数将所有图像合并为高分辨率拼接图像。实验成功地证明了该方法的可行性。我们的原型系统可以通过捕获图像实时获取相机外部参数的初始估计。
Recently, document and photograph digitization from a paper is very important for digital archiving and personal data transmission through the internet. Though many people wish to digitize documents on a paper easily, now heavy and large image scanners are required to obtain high quality digitization. To realize easy and high quality digitization of documents and photographs, we propose a novel digitization method that uses a movie captured by a hand-held camera. In our method, first, 6-DOF(Degree Of Freedom) position and posture parameters of the mobile camera are estimated in each frame by tracking image features automatically. Next, re-appearing feature points in the image sequence are detected and stitched for minimizing accumulated estimation errors. Finally, all the images are merged as a high-resolution mosaic image using the optimized parameters. Experiments have successfully demonstrated the feasibility of the proposed method. Our prototype system can acquire initial estimates of extrinsic camera parameters in real-time with capturing images.