| 摘要 |
<p>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.</p> |
