69 citations · 243 across the 9 of their papers we have counts for
11 papers
Quantification of Pollen Viability in Lantana camara By Digital Holographic Microscopy
Vipin Kumar, Nishant Goyal, Abhishek Prasad +3
Pollen grains represent the male gametes of seed plants and their viability is critical for efficient sexual reproduction in the plant life cycle. Pollen analysis is used in divers…
Quantitative phase imaging of single particles from a cryoEM micrograph
Apoorv Pant, Manidipa Banerjee, Kedar Khare
We show that de-focused single particle images recorded using a cryo-electron microscope (cryoEM) system may be processed like a Fresnel zone in-line hologram to obtain physically…
True 3D reconstruction in digital holography
Jasleen Birdi, Sunaina, Mansi Butola +1
We examine the nature of the 3D image as obtained by replay (or back-propagation) of the object wave from the hologram recording plane to the original object volume. While recordin…
Mean Gradient Descent: An optimization approach for single-shot interferogram analysis
Sunaina, Mansi Butola, Kedar Khare
Complex object wave recovery from single-shot interference pattern is an important practical problem in interferometry and digital holography. The most popular single-shot interfer…
Unsupervised organization of cervical cells using high resolution digital holographic microscopy
Jyoti Mangal, Rashi Monga, Sandeep R. Mathur +4
We report results on unsupervised organization of cervical cells using microscopy of Pap-smear samples in brightfield (3-channel colour) as well as high resolution quantitative pha…
Phase retrieval with complexity guidance
Mansi Butola, Sunaina, Kedar Khare
Iterative phase retrieval methods based on the Gerchberg-Saxton (GS) or Fienup algorithm require a large number of iterations to converge to a meaningful solution. For complex-valu…
Optimal vector beams maintaining robust intensity profile on propagation through turbulence
Priyanka Lochab, Paramasivam Senthilkumaran, Kedar Khare
We report experiments on propagation of scalar and vector optical beams through random phase screens mimicking turbulence and show that the intensity profile of the beam containing…
Angular Lens
Rishabh Sahu, Swati Chaudhary, Kedar Khare +3
We propose a single phase-only optical element that transforms different orbital angular momentum (OAM) modes into localized spots at separated angular positions on a transverse pl…
Dictionary based Approach to Edge Detection
Nitish Chandra, Kedar Khare
Edge detection is a very essential part of image processing, as quality and accuracy of detection determines the success of further processing. We have developed a new self learnin…
Sparsity assisted solution to the twin image problem in phase retrieval
Charu Gaur, Baranidharan Mohan, Kedar Khare
The iterative phase retrieval problem for complex-valued objects from Fourier transform magnitude data is known to suffer from the twin image problem. In particular, when the objec…
Multipixel sub-shot noise phase measurement with classical light interferometry
Mandeep Singh, Kedar Khare, Anand Kumar Jha +2
We demonstrate accurate phase measurement from low photon level interference data using a constrained optimization method that takes into account the expected redundancy in the unk…