Readable matrix code

• US 9,239,978 B2
• Filed: 02/04/2015
• Issued: 01/19/2016
• Est. Priority Date: 02/21/2012
• Status: Expired due to Fees

• Current Assignee: Alibaba Group Holding Ltd.
• Original Assignee: Eyeconit Ltd. (Alibaba Group Holding Ltd.)
• Inventors: Friedman, Itamar, Alva, Nevo, Peled, Uriel
• Primary Examiner(s): TRAIL, ALLYSON NEEL
• Application Number:
  US14/613,513
• Publication Number:
  US 20150220827A1
• Time in Patent Office: 349 Days
• Field of Search: 235/492, 235/494, 235/375
• US Class Current: 1/1
• CPC Class Codes: G06K 19/06037 multi-dimensional coding
• CPC Class Codes: G06K 19/06103 the marking being embedded in a human recognizable image, e.g. a company logo with an embedded two-dimensional code

Abstract

A method of generating a readable matrix code image encoding a message based on an input image and a readable matrix coding specification, comprising: calculating function areas readable to comply with a function patterns specification; determining an extent of free cells and derived cells according to a code word specification; calculating decode input values for free cells such that the appearance of the free cells compared to respective areas of the input image complies with a visual perceptual similarity criterion and with the code word specification; and calculating decode input values for derived cells based on the free cells decode input values and in compliance with the code word specification.

Claims

1. A computerized method of generating a readable two-dimensional code encoding an input message and embedding additional information recognizable by a human eye from an input image, the two-dimensional code including function patterns and cells, the method comprising:

calculating the function patterns; and

calculating decoded values for the cells based on at least the encoded message in accordance with the additional information, such that an appearance of a portion of the cells in the two-dimensional code is visual perceptually similar to the additional information from the input image.

2. The computerized method according to claim 1, wherein the additional information recognizable by a human eye includes a logo.