Neopath, Inc.

Michael J Seo

Seho Oh

Chih-Chau L Kuan

Shih-Jong James Lee

James K Riley

Keith L Frost

Florence W Patten

Measurement of the optical transfer function of an optical system imaging a bar pattern. A one dimensional fast Fourier transform processes sampled image data from the bar pattern. A model of the system utilizes robust measurements of the period, duty cycle and center of each stripe in the pattern. A signal alias free optical transfer function is estimated from the plurality of one dimensional frequency representation of the signal. An idealized bar pattern synthesized from the measured parameters of period, duty cycle and the center of each stripe in the pattern generates an ideal optical transfer function. The noise reduced optical transfer function, OTF, is estimated from OTF of the signal and OTF of the synthesized bar pattern.

Method and apparatus for alias free measurement of optical transfer

Image enhancement for a digital image, such as an image of a biological specimen mounted on a microscope slide or a cytological specimen is herein described. A digital representation of the image is dilated to produce a dilated image and eroded to provide an eroded image. The dilated image, eroded image and the digital representation of the image are then processed to produce an enhanced image.

Image enhancement method and apparatus

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Kirkland, WA, United States of America

Michael J Seo