Variational method for super-resolution optical flow
| Autor: | Takashi Imaizumi, Tomoya Sakai, Atsushi Imiya, Yusuke Kameda, Yoshihiko Mochizuki |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Digital image correlation business.industry Computation ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Optical flow Geometry Optical field Variational method Motion field Control and Systems Engineering Computer Science::Computer Vision and Pattern Recognition Motion estimation Signal Processing Displacement field Computer vision Computer Vision and Pattern Recognition Artificial intelligence Electrical and Electronic Engineering business Software |
| Zdroj: | Signal Processing. 91:1535-1567 |
| ISSN: | 0165-1684 |
| DOI: | 10.1016/j.sigpro.2010.11.010 |
| Popis: | The motion fields in an image sequence observed by a car-mounted imaging system depend on the positions in the imaging plane. Since the motion displacements in the regions close to the camera centre are small, for accurate optical flow computation in this region, we are required to use super-resolution of optical flow fields. We develop an algorithm for super-resolution optical flow computation. Super-resolution of images is a technique for recovering a high-resolution image from a low-resolution image and/or image sequence. Optical flow is the appearance motion of points on the image. Therefore, super-resolution optical flow computation yields the appearance motion of each point on the high-resolution image from a sequence of low-resolution images. We combine variational super-resolution and variational optical flow computation in super-resolution optical flow computation. Our method directly computes the gradient and spatial difference of high-resolution images from those of low-resolution images, without computing any high-resolution images used as intermediate data for the computation of optical flow vectors of the high-resolution image. |
| Databáze: | OpenAIRE |
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