Transient Biometrics Nails Dataset
An extended version of an experimental dataset, called Transient Biometrics Nails Dataset (TBND), was created. TBND is composed of images of the right index finger. During acquisition the subject was instructed to lay her finger over a flat white surface and a simple point-and-shoot camera was used to acquire an image without the the use of a flash. No explicit instructions with respect to force applied were given and thus the results incorporate arbitrary force differences between users and capture sessions. Acquisition was thus done in a semi-controlled environment; apart from the white background and indirect lighting, the images present variation with respect to scale, focal plane and illumination. The dataset consists of three subsets, each one compromising the same 93 subjects, but varying on acquisition date. The first subset D01 consists of images acquired on the first acquisition day. The second subset D02 is composed of images acquired one day later. The third subset D30 was acquired 1 month after the first acquisition date. Given acquisition restrictions, the acquisitions of D30 have up to two days’ tolerance. This represents a massive expansion of the originally collected dataset TBND V01