A method for selecting an eye image in a sequence of images, implemented in an electronic device, the method comprising steps of: pre-selecting images (t) by a simplified sharpness and/or contrast analysis of images in the sequence of images, and selecting a pre-selected image by a close analysis of the sharpness of the pre-selected images, characterized in that it comprises for each pre-selected image a step of locating the image of the pupil of the eye, the selection of a pre-selected image comprising steps of: determining an intensity profile (D(θ)) of pixels situated on a substantially circular iris ring, and centered substantially on the center of the image of the pupil, the intensity profile being established according to an angle determining the position of each pixel on the ring, measuring the sharpness of the texture of the iris of the eye in the image, from an energy of medium-frequency components extracted from the intensity profile, calculating a quality index (Q(t)) for each image according to a density measurement of the black pixels of the pupil image, to the measurement of the sharpness of the texture of the image of the iris, and to a measurement of the speed of displacement of the pupil in the image in relation to a previous image, and comparing the image quality index with a quality threshold, the images selected having a quality index above the quality threshold. pre-selecting images (t) by a simplified sharpness and/or contrast analysis of images in the sequence of images, and selecting a pre-selected image by a close analysis of the sharpness of the pre-selected images, characterized in that it comprises for each pre-selected image a step of locating the image of the pupil of the eye, the selection of a pre-selected image comprising steps of: determining an intensity profile (D(θ)) of pixels situated on a substantially circular iris ring, and centered substantially on the center of the image of the pupil, the intensity profile being established according to an angle determining the position of each pixel on the ring, measuring the sharpness of the texture of the iris of the eye in the image, from an energy of medium-frequency components extracted from the intensity profile, calculating a quality index (Q(t)) for each image according to a density measurement of the black pixels of the pupil image, to the measurement of the sharpness of the texture of the image of the iris, and to a measurement of the speed of displacement of the pupil in the image in relation to a previous image, and comparing the image quality index with a quality threshold, the images selected having a quality index above the quality threshold. determining an intensity profile (D(θ)) of pixels situated on a substantially circular iris ring, and centered substantially on the center of the image of the pupil, the intensity profile being established according to an angle determining the position of each pixel on the ring, measuring the sharpness of the texture of the iris of the eye in the image, from an energy of medium-frequency components extracted from the intensity profile, calculating a quality index (Q(t)) for each image according to a density measurement of the black pixels of the pupil image, to the measurement of the sharpness of the texture of the image of the iris, and to a measurement of the speed of displacement of the pupil in the image in relation to a previous image, and comparing the image quality index with a quality threshold, the images selected having a quality index above the quality threshold.