Numerical suppression of zero-order image in digital holography
نویسندگان
چکیده
منابع مشابه
Suppression of the zero-order term in off-axis digital holography through nonlinear filtering.
We present experimental validation of a new reconstruction method for off-axis digital holographic microscopy (DHM). This method effectively suppresses the object autocorrelation, namely, the zero-order term, from holographic data, thereby improving the reconstruction bandwidth of complex wavefronts. The algorithm is based on nonlinear filtering and can be applied to standard DHM setups with re...
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We propose a method to suppress the so-called zero-order term in a hologram, based on an iterative principle. During the hologram acquisition process, the encoded information includes the intensities of the two beams creating the interference pattern, which do not contain information about the recorded complex wavefront, and that can disrupt the reconstructed signal. The proposed method selecti...
متن کاملNumerical twin image suppression by nonlinear segmentation mask in digital holography.
The in-line holography has obvious advantages especially in wider spatial bandwidth over the off-axis holography. However, a direct current(DC)-noise and an unwanted twin image should be separated or eliminated in the in-line holography for a high quality reconstruction. An approach for suppressing the twin image is proposed by separating the real and twin image regions in the digital holograph...
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Digital holography enables the encoding of complex wavefronts with an intensity measurement, making it possible to recover the quantitative phase for phase-contrast imaging [1] or profilometry [2]. Encoding the wavefront in this fashion leads, however, to the generation of artifacts such as the socalled zero-order, which is the sum of the intensities of the object and reference waves, and the s...
متن کاملحذف پراش مرتبه صفر در تصاویر بازسازی شده به روش تمام‌نگاری دیجیتالی
The numerically reconstructed images in digital holography contain two undesirable features. After reconstruction, the zero order diffraction as well as the complex conjugate image will be present in pictures and drastically reduce their qualities. Practical applications of digital holography in the context of characterization and measuring the physical properties of objects require the suppres...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2007
ISSN: 1094-4087
DOI: 10.1364/oe.15.008851