McCormick School of Engineering, Northwestern University
Oliver S. Cossairt
Assistant Professor of Electrical Engineering and Computer Science
Lisa Wissner-Slivka and Benjamin Slivka Junior Professor in Computer Science
2145 Sheridan Road
Evanston, IL 60208-3109
Ph.D. Computer Science, Columbia University, New York City, NY
M.S. Media Arts and Sciences, M.I.T., Cambridge, MA
B.S. Physics, Evergreen State College, Olympia, WA
My research is in the emerging field of computational imaging, which combines expertise in optics, image processing, computer vision, and computer graphics. I design, model and build systems that combine sensors, displays, and novel optical elements. These cameras have applications in medical, astronomical, and scientific imaging. I am building a new breed of cameras with increased functionality and performance. I believe that my research will impact the way cameras are built in coming decades, from low-end consumer cameras to high-end scientific instruments.
I am fascinated with the idea that cameras can be very finely tuned towards specific purposes, and that doing so can be an excellent way to capture specific visual information. We can place the camera at the center of a larger visual processing system whose purpose is to analyze and interpret visual information. As such, the camera cannot be designed without keeping the entire system in mind.
I am particularly interested in developing imaging and display systems that combine a creative use of optical devices and sensor technology to enable new functionality in cameras and displays. My research is focused in the following areas:
- Computational Imaging for leveraging novel optical designs and image processing together to enable new capabilities in conventional cameras, such as extended depth-of-field, digital refocusing, super-resolution, and measuring high dimensional appearance.
- Computer Vision for measuring depth or spectral characteristics that inform a higher-level understanding about a scene, such as geometry or material properties.
- Computational Displays for displaying images with an unprecedented sense of realism by allowing viewers to observe the appearance of objects in a natural and intuitive manner.
- K. Mitra, O. Cossairt, A. Veeraraghavan, "A Framework for Analysis of Computational Imaging Systems,"arXiv:1308.1981, PAMI (submitted), 2013.
- O. Cossairt, M. Gupta, K. Mitra, A. Veeraraghavan, "Performance Bounds for Computational Imaging," Imaging and Applied Optics Technical Papers, OSA, 2013.
- O. Cossairt, K. Mitra, A. Veeraraghavan, "Performance Limits for Computational Photography," International Workshop on Advanced Optical Imaging and Metrology, Springer, 2013.
- D. Miau, O. Cossairt, and S.K. Nayar. "Focal Sweep Videography with Deformable Optics", International Conference on Computational Photography (ICCP), Apr. 2013.
- O. Cossairt, M. Gupta, and S.K. Nayar. "When Does Computational Imaging Improve Performance?", IEEE Transactions on Image Processing (TIP), Aug. 2012.
- O. Cossairt, "Tradeoffs and Limits in Computational Imaging", PhD Thesis, Department of Computer Science, Columbia University, Sep. 2011
- O. Cossairt, D. Miau, and S.K. Nayar. "A Scaling Law for Computational Imaging with Spherical Optics", OSA Journal of the Optical Society of America (JOSA), Nov. 2011.
- O. Cossairt, D. Miau, and S.K. Nayar. "Gigapixel Computational Imaging". IEEE International Conference on Computational Photography (ICCP), Mar. 2011.
- O. Cossairt, C. Zhou, and S. K. Nayar. "Diffusion Coded Photography for Extended Depth of Field". ACM Transactions on Graphics (Proceedings of SIGGRAPH), Jul. 2010.
- O. Cossairt and S. K. Nayar. "Spectral Focal Sweep: Extended Depth of Field from Chromatic Aberrations". IEEE International Conference on Computational Photography (ICCP), Mar. 2010.
- C. Zhou, O. Cossairt, and S. K. Nayar. "Depth from Diffusion". Proceedings of IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR), Jun. 2010.
- O. Cossairt, S. K. Nayar, and R. Ramamoorthi. "Light Field Transfer: Global Illumination Between Real and Synthetic Objects". ACM Transactions on Graphics (Proceedings of SIGGRAPH), Aug. 2008.