90 citations · 218 across the 9 of their papers we have counts for
9 papers
Object Plane Detection and Phase Retrieval from Single-Shot Holograms using Multi-Wavelength In-Line Holograph
Hanqing Zhang, Tim Stangner, Krister Wiklund +1
Phase retrieval and the twin-image problem in digital in-line holographic microscopy can be resolved by iterative reconstruction routines. However, recovering the phase properties…
A step-by-step guide to reduce spatial coherence of laser light using a rotating ground glass diffuser
Tim Stangner, Hanqing Zhang, Tobias Dahlberg +2
Wide field-of-view imaging of fast processes in a microscope requires high light intensities motivating the use of lasers as light sources. However, due to their long spatial coher…
UmUTracker: A versatile MATLAB program for automated particle tracking of 2D light microscopy or 3D digital holography data
Hanqing Zhang, Tim Stangner, Krister Wiklund +2
We present a versatile and fast MATLAB program (UmUTracker) that automatically detects and tracks particles by analyzing video sequences acquired by either light microscopy or digi…
A robust particle detection algorithm based on symmetry
Alvaro Rodriguez, Hanqing Zhang, Krister Wiklund +4
Particle tracking is common in many biophysical, ecological, and micro-fluidic applications. Reliable tracking information is heavily dependent on of the system under study and alg…
Circle detection using isosceles triangles sampling
Hanqing Zhang, Krister Wiklund, Magnus Andersson
Detection of circular objects in digital images is an important problem in several vision applications. Circle detection using randomized sampling has been developed in recent year…
Investigation of force approximations in tethered cells simulations
Johan Zakrisson, Krister Wiklund, Ove Axner +1
Simulations of tethered cells in viscous sub-layers are frequently performed using the Stokes drag force, but without taking into account contributions from surface corrections, li…