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Aitchison Geometry and Wavelet Based Joint Demosaicking and Denoising for Low Light Imaging.

Chikkamadal Manjunatha, Prathiksha
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1627842487059544

Abstract Details

2021, Master of Science (M.S.), University of Dayton, Electrical Engineering.
Noise is ubiquitous to practically all types of digital imaging systems. Low light color imaging is particularly challenging as the performance of demosaicking is affected by the presence of noise. Decoupling demosaicking and denoising tasks therefore results in artifacts. In this thesis, we address the low light color imaging problem by designing demosaicking in conjunction with denoising. Representing the RGB image as a combination of luminance and chrominance components, we derive a novel Bayer CFA joint demosaicking and denoising technique, based on a combination of wavelet-based demosaicking and Aitchison geometry modeling of wavelet-logarithm. The proposed demosaicking method is a minimum mean squared error estimate of the latent luminance and chrominance Aitchison variables, whose prior distribution is modeled as Gaussian scale mixtures. The resultant joint demosaicking-denoising method yields RGB image from noisy CFA data with image contrast details preserved while attenuating the noise. We verify the effectiveness of the proposed algorithm on a new 42 megapixel raw RGB sensor data.
Keigo Hirakawa (Advisor)
46 p.
Electrical Engineering
Joint demosaicking and denoising, Low light imaging, Poisson noise

Recommended Citations

Citations

  • Chikkamadal Manjunatha, P. (2021). Aitchison Geometry and Wavelet Based Joint Demosaicking and Denoising for Low Light Imaging. [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1627842487059544

    APA Style (7th edition)

  • Chikkamadal Manjunatha, Prathiksha. Aitchison Geometry and Wavelet Based Joint Demosaicking and Denoising for Low Light Imaging. 2021. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1627842487059544.

    MLA Style (8th edition)

  • Chikkamadal Manjunatha, Prathiksha. "Aitchison Geometry and Wavelet Based Joint Demosaicking and Denoising for Low Light Imaging." Master's thesis, University of Dayton, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1627842487059544

    Chicago Manual of Style (17th edition)

dayton1627842487059544
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© 2021, all rights reserved.
This open access ETD is published by University of Dayton and OhioLINK.