Method and device for determining the number of partial palm prints to be acquired in order to reconstruct the entirety of a palm print, and corresponding acquisition method and system

A method for determining a number of partial palm-print images to be acquired using a papillary print acquisition device, said papillary print acquisition device being equipped with an acquisition area a size of which is smaller than the area of a palm representative of a population of individuals, the method comprising the following steps implemented by a computer:

• a) obtaining an image of a papillary print of an individual acquired using said acquisition device;
• b) measuring, using the papillary print image, at least one geometric dimension of the papillary print;
• c) estimating at least one geometric dimension of the palm of the individual based on at least one geometric dimension of the papillary print;
• and
• d) determining, from the at least one estimated geometric dimension of the palm of the individual, a number N of acquisitions of images I1, . . . IN of the palm of the individual required to cover an entire area of the palm, each acquisition corresponding to one position P1, . . . PN of the palm of the individual on the acquisition area of the acquisition device.