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The Evernote Corporation patent solves the following problem:
In 2012, the number of connected mobile devices in use, including mobile phones and tablets, more than the population of our planet. Market estimates show that in 2016 there were over ten billion Internet-connected mobile devices in the hands of end users, approximately eight billion smartphones and tablets. Therefore, the digital lifestyle of billions of people would be more confident in their use of smartphones and tablet applications.
Our analysis of this patent is as follows:
Evernote Corporation’s patent US 9213917 B2 deals with Using surfaces with printed patterns for image and data processing.
Adjusting data for the photographed image includes detecting a reference image data, which the reference image includes a noticeable uniformity and adjust the data according to the reference image. The reference image can be a uniform grid pattern of dots preprinted paper. A paper form can be determined by adjusting the data as reference image. The paper forms may be determined by the spacing, and / or pattern of dots, and / or page layout area covered with dots. Adjusting the data may include taking effect equivalent to a folded corner in a lost corner, a corner blocked, lens flare spots, and / or a shadow. The position coordinates of the data can be adjusted by normalizing the grid through a non-linear change that eliminates curvature of the grid and / or distorting the perspective.
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