Vein recognition is a non-contact biometric technology, which enables recognition by analyzing the characteristic of the vein. This work uses two measuring methods as contrast, which use CCD (Charge Coupled Device) camera and TC (Thermographic Camera), to recognize the veins of a human arm or hand. The whole blood-vessels on the pictures will use the digital image processing to help recognizing the veins. TC is used for capturing vein images and calculating...