Title:
バーコード画像のボケ修正を行う方法、端末、およびコンピュータ可読記録媒体
Document Type and Number:
Japanese Patent JP5703520
Kind Code:
B2
Abstract:
Provided is a method for deblurring a bar-code image input via a mobile terminal device, the method comprising the steps of: (a) varying the focal length between a mobile terminal device and any desired article to be bought, and calculating a first to an n th optical transfer function (OTF) specific to the mobile terminal device; (b) inputting a bar-code image and then fixing a specific value, in a signal-to-noise ratio within a permissible range, as the value to be applied to a Wiener filter error metric, and next applying n point spread functions (PSF), that have been calculated from the first to n th optical transfer functions, to the Wiener filter error metric by means of the binary search method, and determining whether the result of applying the Wiener filter error metric is below a predetermined threshold; and (c) subjecting the barcode image to Wiener filtering by selecting a Wiener filter value comprising the signal-to-noise ratio and the point spread function when the result of applying the Wiener filter error metric is below the threshold.
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Inventors:
Park, Min Jae
Application Number:
JP2013548344A
Publication Date:
April 22, 2015
Filing Date:
December 29, 2011
Export Citation:
Assignee:
INTEL CORPORATION
International Classes:
G06T5/00; G06V10/30; H04N5/225
Domestic Patent References:
| JP2009033561A |
Other References:
瀬野和也,中野和司,ディジタル逆フィルタによるバーコード信号再生について,電気学会研究会資料,産業計測制御研究会,日本,社団法人電気学会,2009年12月 2日,IIC-09-165~169,p23-28
Attorney, Agent or Firm:
Longhua International Patent Service Corporation