Teranex, Inc.

Vision Research Laboratories

Harley R Myler

Michele D Van Dyke-Lewis

Alfred S Jolson

Arthur Weeks

A method and system for analyzing and measuring image quality between two images. A series of conversions and transformations of image information are preformed to produce a single measure of quality. A YCrCb frame sequence is first converted using RGB conversion to an RGB frame sequence. The resulting RGB frame sequence is converted using spherical coordinate transform (SCT) conversion to SCT images. A Gabor filter is applied to the SCT images to produce a Gabor Feature Set, and a statistics calculation is applied to the Gabor Feature Set. The resulting Gabor Feature Set statistics are produced for both the reference frame and the frame to be compared. Quality is computed for these Gabor Feature Set statistics to produce a video quality measure. Spectral decomposition of the frames is also performable for the Gabor Feature Set, rather than the statistics calculation, allowing graphical comparison of results for the compared frames.

Method for measuring and analyzing digital video quality

An apparatus for evaluating the alignment of both eyes of a patient objectively in primary, secondary and tertiary gaze, and the Bielschowsky head tilt positions and to diagnose for phorias, tropias and intermittent tropias. The apparatus has a head restraint and a mounted fixation target in a spaced relationship to the head restraint and having adjustments for adjusting the target along three axis. Electronic shutters are used to occlude each eye during the testing. A camera is used for imaging the eye of a patient having his head in the head restraint with his eyes aligned with the target. The camera is mounted adjacent to the target on the xyz mount. A micro-computer has a monitor screen, and is operatively coupled to the camera for receiving a series of images from the camera stored data for each frame, and comparing one frame image with another frame image of the same eye and gaze position or both eyes in the same frame to thereby determine a patient's ocular alignment, pupil size, corneal diameter and interpupillary distance.

Growing community of inventors

Orlando, FL, United States of America

Harley R Myler