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David Grier's Home Page

Department of Physics and Center for Soft Matter Research
New York University

Downloadable Software

Tracking

Particle Tracking Routines

ProgramPurpose
bpass.pro Implements a real-space bandpass filter which suppress pixel noise and long-wavelength image variations while retaining information of a characteristic size.
fastfeature.pro Find the centroids of disk-like features in an image quickly.
feature.pro Finds and measures roughly circular 'features' within an image.
featuretool.pro Graphical interface for setting parameters for FEATURE.
tracking.tgzGzipped tar archive

HOT

Computer-Generated Holography Routines

ProgramPurpose
holo_init.pro Set up the HOLO_COMMON common block for HOT applications.
fastphase.pro Calculates the phase hologram encoding a desired trapping pattern by superposing fields as fast as possible.
dsphase.pro Calculates the phase hologram encoding a desired optical intensity pattern using superposition followed by direct search refinement.
vortex.pro Returns a phase hologram encoding a helical mode.
maketheta.pro Creates an array whose values are the angles in radians relative to the x-axis of each pixel in the array.
makerho.pro Creates an array whose values are the distances from the center of each pixel in the array.
holography.tgzGzipped tar archive

Tracking

Utility Routines

ProgramPurpose
read_gdf.pro Read in data files created by WRITE_GDF.
write_gdf.pro Writes IDL-style data to disk in a format which can be easily read back in.
utility.tgzGzipped tar archive

Contact Information

David G. Grier             Department of Physics
                           Center for Soft Matter Research
(212) 998-3713 (voice)     New York University
(212) 995-4016 (FAX)       4 Washington Place
david.grier@nyu.edu        New York, NY 10003

Last Modified: Sat Nov 18 15:24:44 EST 2006