23 September 2014 MTF analysis for coded aperture imaging in a flat panel display
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In this paper, we analyze the modulation transfer function (MTF) of coded aperture imaging in a flat panel display. The flat panel display with a sensor panel forms lens-less multi-view cameras through the imaging pattern of the modified redundant arrays (MURA) on the display panel. To analyze the MTF of the coded aperture imaging implemented on the display panel, we first mathematically model the encoding process of coded aperture imaging, where the projected image on the sensor panel is modeled as a convolution of the scaled object and a function of the imaging pattern. Then, system point spread function is determined by incorporating a decoding process which is dependent on the pixel pitch of the display screen and the decoding function. Finally, the MTF of the system is derived by the magnitude of the Fourier transform of the determined system point spread function. To demonstrate the validity of the mathematically derived MTF in the system, we build a coded aperture imaging system that can capture the scene in front of the display, where the system consists of a display screen and a sensor panel. Experimental results show that the derived MTF of coded aperture imaging in a flat panel display system well corresponds to the measured MTF.
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Sungjoo Suh, Sungjoo Suh, Jae-Joon Han, Jae-Joon Han, Dusik Park, Dusik Park, "MTF analysis for coded aperture imaging in a flat panel display", Proc. SPIE 9217, Applications of Digital Image Processing XXXVII, 92170K (23 September 2014); doi: 10.1117/12.2061639; https://doi.org/10.1117/12.2061639

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