Differences

This shows you the differences between two versions of the page.

Link to this comparison view

wiki:motion_blur [2014/04/14 20:07]
Alessandro G created
wiki:motion_blur [2014/04/14 20:39] (current)
Alessandro G
Line 1: Line 1:
-====== Analysis of Motion Blurred Images ====== +====== ​Papers related to the Analysis of Motion Blurred Images ====== 
-===== Isolating Motion and Color in a Motion Blurred Image (BMVC 2007) ===== +This page reports several paper related to the analysis of motion blurred images (i.e. my PhD thesis work). 
-Alessandro Giusti, Vincenzo Caglioti+ 
 +===== On the Apparent Transparency of a Motion Blurred Object: extracting information from blurred smears ===== 
 +Vincenzo Caglioti, Alessandro Giusti \\ 
 +International Journal on Computer Vision, 2010 \\ 
 +Previously: Proceedings of the First International Workshop on Photometric Analysis For Computer Vision (PACV), 2007 
 + 
 +==== Abstract ==== 
 +{{ :​wiki:​2008-ijcv.png?​nolink&​400|}} 
 +An object which moves during the exposure time 
 +results in a blurred smear in the image. We consider the 
 +smear as if it was the image of a semitransparent object, and 
 +we retrieve its alpha matte by means of known techniques. 
 +The alpha value at a pixel is meaningfully interpreted as the 
 +fraction of the exposure time during which the object projection 
 +overlapped that pixel. 
 +Basing on this fact, our work highlights interesting qualitative 
 +and quantitative properties of the alpha matte, which 
 +can be used to derive constraints on the object’s apparent 
 +contour, and its motion during the exposure time, from a single 
 +motion-blurred image; we also show that some of these 
 +properties hold on the original image. 
 +The theory is validated with experimental results both on 
 +synthetic and real images, highlighting strengths and limitations;​ 
 +we point out a range of possible applications,​ including 
 +blurred image interpretation,​ temporal superresolution 
 +of object contours, model-based reconstruction of nontrivial 
 +motion, and improvements of alpha matting techniques. 
 + 
 +==== Paper ==== 
 +Preprint [[http://​www.idsia.ch/​~giusti/​papers/​2008/​ijcv.pdf|PDF]] ([[http://​www.idsia.ch/​~giusti/​papers/​2008/​ijcv-sup.zip|supplementary material]]). ​ Springer [[http://​link.springer.com/​article/​10.1007%2Fs11263-008-0165-1#​page-1|website]]. 
 + 
 +==== Bibtex ==== 
 +<​code>​ 
 +@article{caglioti2010apparent,​ 
 +  title={On the apparent transparency of a motion blurred object}, 
 +  author={Caglioti,​ Vincenzo and Giusti, Alessandro},​ 
 +  journal={International journal of computer vision}, 
 +  volume={86},​ 
 +  number={2-3},​ 
 +  pages={243--255},​ 
 +  year={2010},​ 
 +  publisher={Springer} 
 +
 + 
 +@inproceedings{giusti2007apparent,​ 
 +  title={On the apparent transparency of a motion blurred object}, 
 +  author={Giusti,​ Alessandro and Caglioti, Vincenzo},​ 
 +  booktitle={Proceedings of the First International Workshop on Photometric Analysis For Computer Vision (PACV)}, 
 +  year={2007} 
 +
 +</​code>​ 
 + 
 +===== Recovering ball motion from a single motion-blurred image ===== 
 +Vincenzo Caglioti, Alessandro Giusti \\ 
 +Computer Vision and Image Understanding,​ 2008 \\ 
 +Previously: Proceedings of the CVBASE ECCV workshop, 2006 
 + 
 +==== Abstract ==== 
 +Motion blur often affects the ball image in photographs and video frames in many sports such as tennis, table tennis, squash and golf. In this work, we operate on a single calibrated image depicting a moving ball over a known background, and show that motion-blurred ball images, usually unwelcome in computer vision, bear more information than a sharp image. We provide techniques for extracting such information ranging from low-level image processing to 3D reconstruction,​ and present a number of experiments and possible applications,​ such as ball localization with speed and direction measurement from a single image, and ball trajectory reconstruction from a single long-exposure photograph. 
 + 
 +{{ :​wiki:​2008-cviu.jpg?​nolink&​900 |}} 
 + 
 +==== Paper ==== 
 +Preprint [[http://​www.idsia.ch/​~giusti/​papers/​2008/​cviu.pdf|PDF]],​ [[http://​dx.doi.org/​10.1016/​j.cviu.2008.01.008 | DOI]] Link. 
 + 
 +==== Bibtex ==== 
 +<​code>​ 
 +@article{caglioti2009recovering,​ 
 +  title={Recovering ball motion from a single motion-blurred image}, 
 +  author={Caglioti,​ Vincenzo and Giusti, Alessandro},​ 
 +  journal={Computer Vision and Image Understanding},​ 
 +  volume={113},​ 
 +  number={5},​ 
 +  pages={590--597},​ 
 +  year={2009},​ 
 +  publisher={Elsevier} 
 +
 +</​code>​ 
 + 
 +===== Estimation of 3D Instantaneous Motion of a Ball from a Single Motion-Blurred Image ===== 
 +Giacomo Boracchi, Vincenzo Caglioti, Alessandro Giusti\\ 
 +Chapter in Book "​[[http://​www.springerlink.com/​content/​v85168/?​p=48c0c5e172b9495b9cde56bd29f133b8&​pi=0|Computer Vision and Computer Graphics. Theory and Applications]]",​ 2009 
 + 
 +==== Abstract ==== 
 +We present a single-image algorithm for reconstructing the 3D velocity, the 3D spin axis, and the angular speed of a moving ball. Peculiarity of the proposed algorithm is that this reconstruction is achieved by accurately analyzing the blur produced by the ball motion during the exposure. We combine image analysis techniques in order to obtain 3D estimates, that are then integrated into a geometrical model for recovering the 3D motion. 
 + 
 +The algorithm is validated with experiments on both synthetic and camera images. In a broader scenario, we exploit this specic problem for discussing motivations,​ advantages, and limitations of reconstructing 3D motion from motion blur. 
 + 
 +==== Paper ==== 
 +Springer [[http://​link.springer.com/​chapter/​10.1007%2F978-3-642-10226-4_18|Webpage]] 
 + 
 +==== Bibtex ==== 
 +<​code>​ 
 +@incollection{boracchi2009estimation,​ 
 +  title={Estimation of 3d instantaneous motion of a ball from a single motion-blurred image}, 
 +  author={Boracchi,​ Giacomo and Caglioti, Vincenzo and Giusti, Alessandro},​ 
 +  booktitle={Computer Vision and Computer Graphics. Theory and Applications},​ 
 +  pages={225--237},​ 
 +  year={2009},​ 
 +  publisher={Springer} 
 +
 +</​code>​ 
 + 
 + 
 +===== Isolating Motion and Color in a Motion Blurred Image ===== 
 +Alessandro Giusti, Vincenzo Caglioti ​\\ 
 +BMVC 2007
  
 ==== Abstract ==== ==== Abstract ====
Line 36: Line 142:
 </​code>​ </​code>​
  
-===== Basic Video-Surveillance with Low Computational and Power Requirements Using Long-Exposure Frames ​(ACIVS 2008) =====+===== Basic Video-Surveillance with Low Computational and Power Requirements Using Long-Exposure Frames ===== 
 +Vincenzo Caglioti, Alessandro Giusti\\ 
 +ACIVS 2008
  
 ==== Abstract ==== ==== Abstract ====