Zobrazeno 1 - 10
of 216
pro vyhledávání: '"Pramod Rastogi"'
Publikováno v:
Structural Integrity ISBN: 9783030478827
We propose to explore the dynamic speckle contrast imaging (DSCI) modality for non-contact surface defect detection. In this approach, the object under investigation is subjected to a continuous and monotonic loading. A number of speckle images are r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee0765885c824d4bfb43479e6b6d88ca
https://doi.org/10.1007/978-3-030-47883-4_13
https://doi.org/10.1007/978-3-030-47883-4_13
Autor:
Pramod Rastogi, Rishikesh Kulkarni
Publikováno v:
Optics and Lasers in Engineering. 110:41-46
We propose a noise robust two-step phase shifting algorithm for the evaluation of random and unknown phase step. In this algorithm, the phase within a small size two-dimensional window around a user selected pixel in an interferogram is approximated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dff514c3420f996b1a37cf599318df71
https://doi.org/10.1016/j.optlaseng.2018.05.012
https://doi.org/10.1016/j.optlaseng.2018.05.012
Autor:
Pramod Rastogi, Rishikesh Kulkarni
Publikováno v:
Optics and Lasers in Engineering. 104:109-116
A new approach is proposed for the multiple phase estimation from a multicomponent exponential phase signal recorded in multi-beam digital holographic interferometry. It is capable of providing multidimensional measurements in a simultaneous manner f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a59a3f4748ef3ec4da0f1af7a7bffacf
https://doi.org/10.1016/j.optlaseng.2017.08.016
https://doi.org/10.1016/j.optlaseng.2017.08.016
Autor:
Pramod Rastogi, Rishikesh Kulkarni
Publikováno v:
Structural Integrity ISBN: 9783030218935
We propose a fringe analysis algorithm for the automatic detection of defects from a single fringe pattern (FP). Typically, the surface defects exhibit high fringe density areas in the FP. Consequently, high fringe density regions can be utilized as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32001f011a68b1fd4a52a8c971ef6d20
https://doi.org/10.1007/978-3-030-21894-2_14
https://doi.org/10.1007/978-3-030-21894-2_14
Autor:
Pramod Rastogi, Rishikesh Kulkarni
Publikováno v:
Optics and Lasers in Engineering. 87:168-175
We propose a new approach for the direct estimation of the unwrapped phase from a single closed fringe pattern. The fringe analysis is performed along a given row/column at a time by approximating the phase with a weighted linear combination of linea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb963caa76e06b4b913fd359083af984
https://doi.org/10.1016/j.optlaseng.2016.03.016
https://doi.org/10.1016/j.optlaseng.2016.03.016
Autor:
Pramod Rastogi, Rishikesh Kulkarni
Publikováno v:
Optics and Lasers in Engineering. 87:191-196
We propose a new approach for the denoising of a phase fringe pattern recorded in an optical interferometric setup. The phase fringe pattern which is generally corrupted by high amount of speckle noise is first converted into an exponential phase fie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc525939046dfb729bda10f2d9fd59e8
https://doi.org/10.1016/j.optlaseng.2016.04.025
https://doi.org/10.1016/j.optlaseng.2016.04.025
Autor:
Rishikesh Kulkarni, Pramod Rastogi
Publikováno v:
Optics and Lasers in Engineering. 87:1-17
Keywords: Speckle interferometry ; Digital holographic interferometry ; Digital image correlation ; Fringe projection profilometry ; Digital photoelasticity Reference EPFL-ARTICLE-222716doi:10.1016/j.optlaseng.2016.05.002View record in Web of Science
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67f1d0fa45dbbb497b31c54df7893518
https://doi.org/10.1016/j.optlaseng.2016.05.002
https://doi.org/10.1016/j.optlaseng.2016.05.002
Autor:
Pramod Rastogi, Rishikesh Kulkarni
Publikováno v:
Experimental Mechanics. 56:1029-1038
This paper reports a method for the simultaneous estimation of unwrapped phase and higher order phase derivatives from a single phase fringe pattern recorded in an optical interferometric setup, thereby overcoming substantial barriers to achieving su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e95e27ae7d44809cc1984f424cc6b78
https://doi.org/10.1007/s11340-016-0144-3
https://doi.org/10.1007/s11340-016-0144-3
Autor:
Pramod Rastogi, Rishikesh Kulkarni
Publikováno v:
Optics and Lasers in Engineering. 135:106190
Fringe analysis has been at the forefront of research due to its ubiquity in many optical measurement techniques such as electronic speckle interferometry, shearography, and digital holographic interferometry. The first step of most of the fringe ana
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f2d15486ac778751c803f32a279b721
https://doi.org/10.1016/j.optlaseng.2020.106190
https://doi.org/10.1016/j.optlaseng.2020.106190
Autor:
Rishikesh Kulkarni, Pramod Rastogi
Publikováno v:
Optics and Lasers in Engineering. 135:106358
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bfb4886a695b27eb3ce22a4e8dd7ad4
https://doi.org/10.1016/j.optlaseng.2020.106358
https://doi.org/10.1016/j.optlaseng.2020.106358