Paper
27 February 2015 A system for estimating optics blur PSFs from test chart images
Radka Tezaur, Tetsuji Kamata, Li Hong, Stephen S. Slonaker
Author Affiliations +
Proceedings Volume 9404, Digital Photography XI; 94040D (2015) https://doi.org/10.1117/12.2081458
Event: SPIE/IS&T Electronic Imaging, 2015, San Francisco, California, United States
Abstract
Camera lenses suffer from aberrations that can cause noticeable blur in captured images, especially when large apertures are used. With very small apertures, images become less sharp due to diffraction. The blur that is due to camera optics can be removed by deconvolution if the PSFs that accurately characterize this blur are available. In this paper we describe a new system developed by us that allows estimating optics blur PSFs in an efficient manner. It consists of a new test chart with black square tiles containing small white random circle pattern and software for fully automatic processing of captured images of this chart. It can process a high resolution image of the chart and produce PSF estimates for a dense set of field position covering the entire image frame within a couple of minutes. The system has been tested with several different lenses and the estimated PSFs have been successfully used for removing optics blur from a variety of different images.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Radka Tezaur, Tetsuji Kamata, Li Hong, and Stephen S. Slonaker "A system for estimating optics blur PSFs from test chart images", Proc. SPIE 9404, Digital Photography XI, 94040D (27 February 2015); https://doi.org/10.1117/12.2081458
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CITATIONS
Cited by 3 scholarly publications.
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KEYWORDS
Point spread functions

Cameras

Image processing

Image segmentation

Lenses

Distortion

Image resolution

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