Glottaltopography
is a method to analyze high-speed laryngeal videos. The
method is described in this paper:
Gang
Chen,
Jody Kreiman, Abeer Alwan,
"The
glottaltopogram: a
method of analyzing
high-speed images of the vocal folds", Computer Speech and
Language, 2014, in press. Briefly, the
"glottaltopogram" is based on principal component analysis of
pixels' light-intensity time sequences from consecutive video images.
This
method reveals the overall synchronization of the vibrational patterns
of the
vocal folds over the entire laryngeal area. This method is effective in
visualizing pathological and
normal vocal fold vibratory patterns.
To install, download the "GTG_1.0.zip" file below and extract all files
into a new folder or directory. Also download the associated pdf for
additional instructions. From within Matlab, go to the folder with the
extracted files and type "GTG_gui". This will open a gui from which you
can analyze high-speed videos using glottaltopograph.
GTG analyze tool is
written in Matlab under Windows. The laryngeal high-speed video file
should be .avi format and contain at least approximately 100 ms of
vocal fold vibration (about 10 glottal cycles). Analysis of long video
(over 2 seconds of recorded vocal fold vibration) will take much more
time
to compute.
