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Image input device and authentication device using the same

  • US 20060165265A1
  • Filed: 07/01/2004
  • Published: 07/27/2006
  • Est. Priority Date: 08/22/2003
  • Status: Abandoned Application
First Claim
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1. An image input device comprising:

  • an image input part into which an image is entered;

    an image evaluation part which evaluates image quality or subject of the image by using a predetermined threshold value;

    a cause determination part which determines a cause of image degradation corresponding to the image, based on an evaluation result of the image by the image evaluation part;

    an output part which outputs to a user a predetermined question to determine the cause of image degradation of the image;

    an answer input part into which an answer to the predetermined question is entered; and

    a cause determination part which determines whether a match occurs or not between the cause of image degradation and the cause of image degradation corresponding to the answer, wherein in a case where the cause determination part determines that the cause of image degradation and the cause of image degradation corresponding to the answer do not match with each other, the image evaluation part changes the predetermined threshold value used to evaluate the image so that the cause of image degradation and the cause of image degradation corresponding to the answer can match with each other.

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