Abstract: The present invention relates to a method to segment slap images and to generate accurately labelled individual fingerprints, said method comprising the following steps: reception of inputs images from a contactless fingerprint reader under controlled lighting conditions; computation of a variance in the received images to estimate a slap area as a foreground slap mask in the input images; identification of individual fingers by finding boundary of each finger; verification of a number of fingers and of geometric constraints; calculation of pose and orientation based on shape and geometry information; identification of effective fingertip area on each detected finger according the pose, orientation, as well as geometric information; output of individual fingerprints.

Abstract: The present invention relates to a method to segment slap images and to generate accurately labelled individual fingerprints, said method comprising the following steps: reception of inputs images from a contactless fingerprint reader under controlled lighting conditions; computation of a variance in the received images to estimate a slap area as a foreground slap mask in the input images; identification of individual fingers by finding boundary of each finger; verification of a number of fingers and of geometric constraints; calculation of pose and orientation based on shape and geometry information; identification of effective fingertip area on each detected finger according the pose, orientation, as well as geometric information; output of individual fingerprints.

Abstract: In a method of making a superamphiphobic paper, a fibrous pulp is refined in water to generate fibrils of an average diameter. The water is drained from the fibrils through a mesh. A less polar than water liquid is added to the fibrils, thereby suspending the fibrils therein so as to inhibit agglomeration between the fibrils. The less polar than water liquid and any remaining water are drained from the fibrils. The fibrils are pressed and dried so as to form the paper in which the fibrils have an average spacing. Amorphous phase cellulose is removed from the paper. A predetermined compound is deposited onto a selected surface of the paper. The average diameter and average spacing are chosen so that the paper is phobic to the first liquid.

Abstract: In a method of making a superamphiphobic paper, a fibrous pulp is refined in water to generate fibrils of an average diameter. The water is drained from the fibrils through a mesh. A less polar than water liquid is added to the fibrils, thereby suspending the fibrils therein so as to inhibit agglomeration between the fibrils. The less polar than water liquid and any remaining water are drained from the fibrils. The fibrils are pressed and dried so as to form the paper in which the fibrils have an average spacing. Amorphous phase cellulose is removed from the paper. A predetermined compound is deposited onto a selected surface of the paper. The average diameter and average spacing are chosen so that the paper is phobic to the first liquid.