Computer-aided generation of speckle pattern in digital images

Marek J. Matczak; Aleksander Sokolowski

doi:10.1117/12.195905

12 December 1994 Computer-aided generation of speckle pattern in digital images

Marek J. Matczak, Aleksander Sokolowski

Proceedings Volume 2340, Interferometry '94: New Techniques and Analysis in Optical Measurements; (1994) https://doi.org/10.1117/12.195905
Event: International Conference on Interferometry '94, 1994, Warsaw, Poland

Abstract

The generating algorithm is based on summation of the point-source waves diffracted on the aperture of the imaging system, with the phase as a random variable of uniform statistics and the intensity determined by a `non-speckled' image. Such an approach takes into account the speckle size and form determined by the size and shape of the imaging-system aperture. The computer program based on the algorithm generates the speckle pattern in the image captured or created by a computer. The `non-speckled' image belongs to the input data for the program and it supplies with mean value of the intensity at each pixel of the image. Other input data describe geometrical parameters of the imaging system, including shape and size of its aperture. As an output, the program generates a `speckled' image of the form like that obtained by means of a real imaging system with coherent-light illumination. Images with computer-generated speckle pattern can be used for testing different computer-aided methods of image processing, especially in optical metrology.

Citation Download Citation

Marek J. Matczak and Aleksander Sokolowski "Computer-aided generation of speckle pattern in digital images", Proc. SPIE 2340, Interferometry '94: New Techniques and Analysis in Optical Measurements, (12 December 1994); https://doi.org/10.1117/12.195905

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