Patent №
US 4,513,441
Granted
1985-04-23
Filed 1983
Owner
SPARTA, INC., A CORP. OF MA
Lab
—
AI components
1
vision
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
06519736
Image comparison is accomplished by forming a composite image composed of a reference image and a test image. A two-dimensional image spectrum is generated from the composite image and then is whitened by setting the magnitude of every point of the two-dimensional image spectrum to a uniform level. A phase-only image of the composite image is then constructed, and values of the phase-only image exceeding a predetermined threshold are detected as an indication of the location of a difference between the reference and test images.
AI classification
Ownership
SPARTA, INC., A CORP. OF MA
assignment · 41610366
Assignors
HENSHAW, PHILIP D.
On an employer assignment, the assignors are typically the inventors.