Abstract: An authentication method comprising creating electrocardiogram data of users; calculating a similarity between electrocardiogram data of each user and template data created by averaging electrocardiogram data of each user; creating and training a first NNmodel for every user by using similarities between electrocardiogram data of a user and template data of the same user and similarities between electrocardiogram data of a user and template data of another user, and creating and training second NNmodels for users by using similarities between electrocardiogram data of a user and template data of the user and similarities between electrocardiogram data of the user and template data of another user; and executing a first step in which the similarities calculated using electrocardiogram data for authentication of a user to be authenticated and template data are input to the first NNmodel, and executing a second step in which the similarities are input to the second NNmodels.

Abstract: In an image distance calculator (100), a CPU (104) extracts a frame image from moving images of an object captured by a camera, generates a slice image on the basis of a temporal change in a pixel line on a y-axis at a point x0 in the frame image, calculates a spotting point on the basis of correspondences between pixels in the slice image and pixels in the frame image, obtains pixels in the frame image corresponding to pixels in the slice image by a back-trace process, segments the frame image and slice image into regions, determines a corresponding region corresponding to a segmented region of the slice image, calculates a ratio value from an average q of the numbers of pixels in the corresponding region in the frame image and an average p of the numbers of pixels in the segmented region of the slice image, and calculates the distance z from the camera to the object for each corresponding region using a predetermined distance function.