Image processing of Ramses II statue using speckle photography modulated by a new Hamming linear aperture
Hamed, Abdallah;
Abstract
In this paper, a new concentric Hamming linear aperture is suggested. The point spread function (PSF) is
computed for concentric Hamming linear aperture and it is compared with the corresponding circular, conventional
Hamming and obstructed Hamming apertures. In addition, the autocorrelation corresponding to the aperture under
consideration is computed and plotted. Application of the Hamming linear aperture in the formation of modulated
speckle images of Ramses II statues using definite random diffuser is given. A diffuser limited by a circular uniform
aperture is the basic element in the formation of ordinary speckle images located in the Fourier plane. Meanwhile,
the Fourier spectrum of images of Ramses II multiplied by the ordinary speckle give modulated speckle images.
Discrimination between the modulated speckle images is justified by comparing the profiles corresponding to each
speckle image. Finally, the speckle contours and correlation of the modulated speckle images compared to the
ordinary speckle images are investigated. It is noted that all computation and formation of images and plots are
based on fast Fourier transform (FFT) techniques using Matlab codes
computed for concentric Hamming linear aperture and it is compared with the corresponding circular, conventional
Hamming and obstructed Hamming apertures. In addition, the autocorrelation corresponding to the aperture under
consideration is computed and plotted. Application of the Hamming linear aperture in the formation of modulated
speckle images of Ramses II statues using definite random diffuser is given. A diffuser limited by a circular uniform
aperture is the basic element in the formation of ordinary speckle images located in the Fourier plane. Meanwhile,
the Fourier spectrum of images of Ramses II multiplied by the ordinary speckle give modulated speckle images.
Discrimination between the modulated speckle images is justified by comparing the profiles corresponding to each
speckle image. Finally, the speckle contours and correlation of the modulated speckle images compared to the
ordinary speckle images are investigated. It is noted that all computation and formation of images and plots are
based on fast Fourier transform (FFT) techniques using Matlab codes
Other data
Title | Image processing of Ramses II statue using speckle photography modulated by a new Hamming linear aperture | Authors | Hamed, Abdallah | Issue Date | 16-Aug-2020 | Publisher | Indian Academy of Sciences | Journal | Pramana – J. Phys. | Volume | 94 | DOI | https://doi.org/10.1007/s12043-020-01965-2 |
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