Super-Resolved Video Mosaicing for Documents Based on Extrinsic Camera Parameter Estimation
نویسندگان
چکیده
This paper describes a novel video mosaicing method based on extrinsic camera parameter estimation. With our method, a mosaic image without perspective distortion can be generated, even if none of the input image plane is parallel to the target document. Thus, users no longer have to take special care in holding the camera so that the image plane in the reference frame is parallel to the target. First, extrinsic camera parameters are estimated by tracking image features. Next, by utilizing re-appearing features, estimated extrinsic camera parameters are globally optimized to minimize the estimation error in the whole input sequence. Finally, all the images are projected onto the mosaic image plane, and a super-resolved mosaic image is generated by applying an iterative back projection algorithm. Experiments have successfully demonstrated the feasibility of the proposed method.
منابع مشابه
Doctoral Dissertation Video Mosaicing Based on Structure from Motion for Geometric Distortion-Free Document Digitization
This thesis describes a novel video mosaicing method which is capable of generating a geometric distortion-free mosaic image. Video mosaicing, which stitches partial images of a target into a larger image called a mosaic image, has been used to obtain high resolution images of documents. Generally, mosaic images are prone to two types of geometric distortions: perspective distortion which appea...
متن کاملVideo Mosaicing for Document Imaging
This paper describes a real-time video mosaicing method for digitizing paper documents with mobile and low-resolution video cameras. Our proposed method is based on the structure-from-motion technique with real-time processing. Therefore, it can dewarp an image suffering from perspective deformation caused by a slanted and curved document surface. The curved surfaces are reconstructed as an exp...
متن کاملA New Moving-Object Invariant Video Mosaicing based method for Remote Surveillance A New Moving-Object Invariant Video Mosaicing based method for Remote Surveillance
A moving-object invariant video mosaicing technique applicable to the detection and monitoring activity over a wide area using an active camera has been proposed. There has been a large literature on image mosaicing, however, many of these algorithms focus on the static scene mosaicing using homography among the frames. There has also been recent work on activity monitoring and detection. Such ...
متن کاملMosaicing from a Translating Camera, with Eecient Application of Super-resolution
Mosaicing and super resolution are two ways to combine information from multiple frames in video sequences. Mosaicing displays the information of multiple frames in a single panoramic image. Super-resolution uses regions which appear in multiple frames to improve resolution and reduce noise. Combining both methods enables to represent all the static information in the sequence in a compact and ...
متن کاملHigh-resolution video mosaicing for documents and photos by estimating camera motion
Recently, document and photograph digitization from a paper is very important for digital archiving and personal data transmission through the internet. 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 ...
متن کامل