Evernote Corporation

Jeffrey Zwerner

Eric Pfeiffer

John Barretto

Danielle Reid

Phil Libin

Alexander Pashintsev

Boris Gorbatov

Eugene Livshitz

Alex Pachikov

Slotted cup

Catchall tray

Adjusting data for photographed images includes detecting a reference image in the data, where the reference image contains a detectable uniformity and adjusting the data according to the reference image. The reference image may be a uniform grid pattern of dots preprinted on paper. A paper type may be determined prior to adjusting the data according to the reference image. The paper type may be determined according to spacing and/or patterns of the dots, and/or layout of page areas covered with dots. Adjusting the data may include removing effects corresponding to a folded corner, a removed corner, an obstructed corner, lens flare spots, and/or a shadow. Positional coordinates of the data may be adjusted by normalizing the grid through a non-linear transformation that eliminates curvature of the grid and/or distortions based on perspective.

Growing community of inventors

San Francisco, CA, United States of America

Jeffrey Zwerner