Abstract: Pupil candidate detection unit for detecting positions of pupil candidates in an eye image; and luminance difference calculation unit for obtaining a difference between a maximum value and a minimum value of an image data of an eye image on a circumference of a circle having a center at center coordinates of a pupil candidate and a predetermined radius are provided, and when the output of luminance difference calculation unit is larger than the predetermined threshold, the corresponding pupil candidate is determined not to be the pupil.

Abstract: A pupil detection device according to the present invention includes an image data extraction unit (220) for setting a plurality of concentric circles on an eye image respectively as integrating circle, and extracting the eye image data along the integrating circle, a contour integrating unit for integrating the image data along a circumference of the integrating circle and a pupil position detection unit for detecting center coordinates of the integrating circle whose integrated value obtained by the contour integrating unit changes stepwise with respect to the radius of the integrating circle as pupil position coordinates, and the image data extraction unit (220) includes a plurality of line memories (2241-224L) which can be accessed randomly and a plurality of selectors (2281-228n) for switching image data read from the line memories (2241-224L) in sequence and selecting image data corresponding to the respective integrating circles.

Abstract: A pupil candidate detection unit for detecting positions of pupil candidates which may be candidates of a pupil in an eye image; a pupil candidate retention unit for retaining a plurality of detected positions of the pupil candidates; and a pupil selection unit for selecting a pupil candidate, out of the plurality of pupil candidates, which includes center positions of other pupil candidates in an area within a predetermined distance from the center position of its own are provided.

Abstract: Pupil candidate detection unit for detecting positions of pupil candidates in an eye image; and luminance difference calculation unit for obtaining a difference between a maximum value and a minimum value of an image data of an eye image on a circumference of a circle having a center at center coordinates of a pupil candidate and a predetermined radius are provided, and when the output of luminance difference calculation unit is larger than the predetermined threshold, the corresponding pupil candidate is determined not to be the pupil.

Abstract: A pupil detection device includes an image data extraction unit for determining a plurality of concentric circles on an eye image respectively as integrating circles; a contour integrating unit for integrating the image data extracted by the image data extraction unit along the respective circumferences of the integrating circles; a pupil radius detection unit for detecting that the integrated value of the integrating circle has changed stepwise; a pupil position detection unit for detecting that the center coordinates of the integrating circle as pupil position coordinates when the integrated value of the integrating circle is changed stepwise with respect to the radius of the integrating circle, and the image data extraction unit extracts a plurality of image data simultaneously.