Three-dimensional object recognition from digital Fresnel hologram by wavelet matched filtering

Review of holographic-based three-dimensional object recognition techniques [Invited]

“…Nelleri et al have applied the Mexican hat wavelet-matched filter [37][38][39] to enhance the significant features from the hologram to obtain higher correlation peak and discrimination capability between the objects. A vigorous study on the use of wavelet transform in the recognition of SEOL holograms has also been reported in [40,41].…”

Phase reconstruction in lensless digital in-line holographic microscopy

“…This gives a new perspective to the Gabor's [2] holography and microscopy principle. The strength of the digital holographic microscopy lies in its ability to provide accurate and quantitative phase reconstruction of the sample in addition to the intensity information on a nearly real-time basis [3][4][5][6][7]. Both off-axis and in-line digital holographic schemes [3][4][5][6][7][8][9][10] have been used for imaging three-dimensional objects.…”

“…The strength of the digital holographic microscopy lies in its ability to provide accurate and quantitative phase reconstruction of the sample in addition to the intensity information on a nearly real-time basis [3][4][5][6][7]. Both off-axis and in-line digital holographic schemes [3][4][5][6][7][8][9][10] have been used for imaging three-dimensional objects. Lensless in-line holography using a spherical reference beam, referred to in the literature as digital in-line holographic microscopy (DIHM) [11][12][13][14][15][16][17][18][19], has been used for high-resolution microscopic imaging.…”

Generalized in-line digital holographic technique based on intensity measurements at two different planes

“…DH can easily reconstruct the object wave at different planes by digital refocusing and direct evaluation of the phase distribution of the object wave. Recent advances in fast-speed, high-resolution optoelectronic imaging devices [e.g., CCD and complementary metaloxide semiconductor (CMOS)] have opened up tremendous potential for the use of DH in many fields such as deformation analysis and shape measurement [2,3], particle tracking [4], microscopy [5,6], encryption [7], object recognition [8,9], and data compression [10].…”