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Note recognition for overlapping physical notes

  • US 10,296,789 B2
  • Filed: 07/19/2016
  • Issued: 05/21/2019
  • Est. Priority Date: 10/16/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, by a computing device, an input image of an environment having a plurality of overlapping physical notes, each of the overlapping physical notes having a background color, adjacent ones of the plurality of physical notes having different background colors;

    processing the input image with the computing device to identify each of the overlapping physical notes in the input image, wherein identifying the overlapping physical notes comprises;

    classifying pixels of the input image into one of a plurality of color classes, wherein each of the different background colors corresponds to a respective color class of the plurality of color classes, wherein classifying the pixels comprises;

    grouping adjacent pixels having the same color class into regions that each correspond to a note of the plurality of overlapping physical notes in the input image; and

    determining, based on boundaries of the regions and according to a machine-learning pattern recognition algorithm, boundaries of each of the overlapping physical notes in the input image;

    extracting, by the computing device, content for each of the respective overlapping physical notes based on the respective determined boundary;

    creating, by the computing device, a plurality of digital notes, each of the digital notes representing a particular one of the identified overlapping physical notes; and

    associating, by the computing device, the extracted content for each respective physical note of the identified overlapping physical notes with a corresponding digital note of the plurality of digital notes that represents the respective physical note.

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