Signal-to-noise ratio image validation
AssigneeNCR Corporation
InventorsSik Piu Kwan, Yoshitaka Utsumi
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Abstract
An image is compared to a validation image to obtain a signal-to-noise ratio. The signal-to-noise ratio is used to determine validity of the image. According to an embodiment, the image includes a barcode. According to another embodiment, a minimum threshold value for the signal-to-noise ratio is set and the validity of the image is determined based on the minimum threshold value and the signal-to-noise ratio. The minimum threshold value can be determined by using respective signal-to-noise ratios resulting from comparing a valid image to a validation image and an invalid image to a validation image.
Claims20
A method, comprising:
- comparing, by a processor circuit, an image to a validation image to obtain a signal-to-noise ratio;
- and
- determining validity of the image from the signal-to-noise ratio.
A Point Of Sale (POS) terminal, comprising:
- a scanner;
- a validation module to:
- compare an image to a validation image to produce a signal-to-noise ratio;
- and
- determine validity of the image using the signal-to-noise ratio.
A method, comprising:
- comparing, by a Point Of Sale (POS) terminal, an image to a validation image to obtain a signal-to-noise ratio;
- and
- determining validity of the image from the signal-to-noise ratio.
Dependencies are inferred from the claim text.