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  • Automatic calibration of nonlinearity of intensity in projection systems

    The article discusses the method of automatic elimination of nonlinearity in the registration of intensity in projection systems. Errors in the intensity recording affect the accuracy of phase measurement systems based on structured illumination of objects. Gamma-correction hardware cannot completely eliminate such distortions, since the type of inverse relationship may be a more complex function. The method is based on the projection of the ideal wedge and automatic determination of the intensity levels required for recording

    Keywords: optical measurement systems, structured lighting, profile detection, intensity, nonlinear distortion, digital image processing

  • Super resolution in digital holography

    The article considers a method of increasing the resolution of images in holographic systems based on subpixel shift algorithms. Methods of solving systems of equations of large dimension by reducing to block form are considered. The simplest solution is obtained when a set of matrices with an increased resolution is formed from a set of matrices with a shift in one direction, and then the resultant matrix is formed from the resulting set.

    Keywords: super resolution, subpixel shift, holography, solution of systems of equations, holographic interferometry, aperture