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Date of Award
2019
Document Type
Campus Access Master's Report
Degree Name
Master of Science in Electrical Engineering (MS)
Administrative Home Department
Department of Electrical and Computer Engineering
Advisor 1
Michael C. Roggemann
Advisor 2
Raymond A. Shaw
Committee Member 1
Jeremy P. Bos
Abstract
We studied the effect of image enhancement techniques on digital holograms based on an in-line holographic system for air-borne cloud droplet measurements. A super-Gaussian filter is applied to pre-process the padded raw hologram prior to the reconstruction. The size distribution of pre-processed hologram with padding and filtering depicts a shift to the larger diameter of cloud particles due to the dilation of detected particle images. The dilated particles reside within the instrument's detectable size range. Two different padding methods: (1) zero padding and (2) mean padding show almost identical consequence for number concentration and particle size dilation. However, the pre-processed hologram with padding alone results in minimal improvement.
Recommended Citation
Rahman, Ashfiq, "DIGITAL IN-LINE HOLOGRAM ENHANCEMENT USING FILTERING AND PADDING FOR PARTICLE CHARACTERIZATION", Campus Access Master's Report, Michigan Technological University, 2019.