Two-dimensional Phase Unwrapping Method Using Cost Function of L0Norm
نویسندگان
چکیده
منابع مشابه
Two-Dimensional Phase Unwrapping Using Neural Networks
Imaging systems that construct an image from phase information in received signals include synthetic aperture radar (SAR) and optical Doppler tomography (ODT) systems. A fundamental problem in the image formation is phase ambiguity; i.e. it is impossible to distinguish between phases that differ by 2π. Phase unwrapping in two dimensions essentially consists of detecting the pixel locations of t...
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LEMAIRE, PJ., ATKTNS, R.M., MIZRAHI, v, and REED, WA.: ‘High pressure H2 loading as a technique for achieving ultrahigh UV photosensitivity and thermal sensitivity in GeOz doped optical fibres’, Electron. Lett., 1993, 29, pp. 1191-1 193 C A N ” ? , , J., PASMAN, R., SCEATS, M.G., and KRUG, P.A.: ‘Photosensitisation of phosphosilicate fiber Bragg grating’ in ‘Photosensitivity, and quadratic nonl...
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A hybrid genetic algorithm is proposed to solve the two-dimensional phase unwrapping problem by minimizing the L-norm between the unwrapped and wrapped phase gradients. The unwrapped phase is approximated by estimating the parameters of a function chosen by the genetic algorithm that can achieve the global minimum of the L-norm. Different predefined functions are used on the basis of the object...
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Two-dimensional phase unwrapping is the problem of deducing unambiguous “phase” from values known only modulo 2π. Many authors agree that the objective of phase unwrapping should be to find a (weighted) minimum of the number of places where adjacent discretized phase values differ by more than π. This problem, which is known to be NP-hard, is of considerable practical interest, largely due to i...
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Conventional dual-frequency fringe projection algorithm often suffers from phase unwrapping failure when the frequency ratio between the high frequency and the low one is too large. Zhang et.al. proposed an enhanced two-frequency phase-shifting method to use geometric constraints of digital fringe projection(DFP) to reduce the noise impact due to the large frequency ratio. However, this method ...
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ژورنال
عنوان ژورنال: IOP Conference Series: Earth and Environmental Science
سال: 2017
ISSN: 1755-1307,1755-1315
DOI: 10.1088/1755-1315/57/1/012041