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Evaluating images

  • US 10,185,860 B2
  • Filed: 03/09/2018
  • Issued: 01/22/2019
  • Est. Priority Date: 09/23/2015
  • Status: Active Grant
First Claim
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1. An evaluation method, comprising:

  • receiving a reference pattern corresponding to an output pattern over a network, wherein the output pattern is printed on a medium based on the received reference pattern;

    rendering a scan based instance of the output pattern, wherein the rendered scan based instance comprises;

    a set of features at least corresponding to the printed output pattern; and

    zero or more defect features in addition to the set of features at least corresponding to the printed output pattern, the zero or more defect features comprising zero or more printed defect features;

    computing a difference image based on a comparison of the rendered scan based instance to the received reference pattern, the computed difference image comprising the zero or more defect features of the rendered scan based instance; and

    evaluating the computed difference image if the zero or more printed defect features comprise at least one printed defect feature in proximity to at least one feature of one or more picture elements of the received reference pattern.

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