Method and device for selecting images in a sequence of iris images received as a continuous stream

摘要

The method involves pre-selecting images through simplified analysis of clarity and contrast of each iris image from a set of images, and selecting the pre-selected images through a fine analysis of the clarity and the contrast of each pre-selected images. The pre-selecting of the images is performed by locating a pattern in each image through density measurement of dark pixels in a window (P), by estimating a displacement speed of the pattern in an interest zone (ROI) between two successive images, and by selecting images from which the estimated speed is lower than a speed threshold. The estimation of the pattern position in the image is implemented by a model of a standard Kalman. An independent claim is also included for a device for selecting an image of a set of images with respect to a clarity criterion and a contrast.