Image input device and authentication device using the same
First Claim
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.
2 Assignments
0 Petitions
Accused Products
Abstract
An image input device is provided with: an image input part into which an image is entered; an image evaluation part which evaluates the image quality or subject of the image by using a predetermined threshold value; a cause determination part which determines the cause of image degradation corresponding to the image, based on the evaluation result of the image by the image evaluation part; an output part which outputs to the user a predetermined question; a cause input part into which an answer to the question is entered; and a cause comparison 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.
-
Citations
27 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27)
-
-
6. An image input device comprising:
-
an image input part into which an image of a subject is entered;
an intensity determination part which determines whether intensity of the image is within a first threshold range or not;
a degree-of-focusing determination part which determines whether a degree of focusing of the image is within a second threshold range or not;
a subject detection part which detects a presence or absence of an area which is assumed to be the subject of the image;
a high intensity area detection part which detects a presence or absence of a high intensity area exceeding a third threshold range from the image; and
a cause determination part which determines that a cause of image degradation of the image is reflection due to external light when;
the intensity determination part determines that the intensity of the image is within the first threshold range;
the degree-of-focusing determination part determines that the degree of focusing of the image is within the second threshold range;
the subject detection part detects the area which is assumed to be the subject of the image; and
the high intensity area detection part determines that there is no area exceeding the third threshold range in the image. - View Dependent Claims (16, 24)
-
Specification