3.2.4. Extraction of Biometric Characteristics

In order to extract minutiae from the images, we adopt the principle of the number of pixel connections. The algorithm scans the bloodstream skeletal image to go through each of the pixels, which is the property of the object of interest (ROI). The number of pixel connections, which is measured as the pixel of the object of interest, is scanned. Pixels with higher connections values (greater than 3) are responsible for creating a branching point, which is, otherwise, referred to as minutia. Pixels whose connections are equal to 1 and are found at the edge of the image are also marked as minutia and become the end point of the vein.
