E.i. Dupont De Nemours and Company

Richard Walker Browne

Robert Vincent Canning, Jr

Robert William Johnson

Barry Rubin

Robert V Canning

Douglas Ray Stilwell

Michael H Evans

An image analysis method to quantify visual showthrough of printed images on the reverse face of planar objects, such as paper. An illumination level is set using a white reference object. A white reference image is stored in a computer memory. An image of a planar object having a printed image on the reverse face is stored in a computer memory. A pixel by pixel ratio of the two images is calculated and a mean value of the ratios is calculated to characterize the visual showthrough. The measurements are substantially independent of both the illumination level and image shading.

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Wilmington, DE, United States of America

Richard Walker Browne