Databases - DB3

Database features:

• the fingerprints were acquired by using an optical sensor.
• the image size is 448x478.
• the fingerprints are from 19 volunteers between ages 5 to 73 (55% male).
• one-third of the volunteers were over 55 years of age.
• one-third of the volunteers were under 18 years of age.
• one-sixth of the volunteers were under 7 years of age.
• two images of six fingers (thumb, fore and middle on left and right hands) were taken without interleave from each volunteer at each session.
• each volunteer was seen at four sessions, with no more than two sessions on any single day.
• the time between the first and last sessions was at least 3 days and as long as 3 months, depending upon volunteer.
• the sensor platen was systematically cleaned between acquisition of each image.
• at one session with each volunteer, fingers were cleaned with rubbing alcohol and dried.
• some part of the core was apparent in each image, but care was taken to avoid complete overlap between consecutive images taken during a single session.
• the acquired fingerprints were manually analyzed to assure that the maximum rotation is approximately in the range [-15°, 15°] and that each pair of impressions of the same finger have a non-null overlapping area.

Sample images from DB3; each row shows different impressions of the same finger:

Images from DB3; all the samples are from different fingers and are ordered by quality (top-left: high quality, bottom-right: low quality):