Lumidigm multispectral whole hand imaging system
As biometric systems are increasingly being used in very large-scale and increasingly critical applications, such as border crossing and container control, the need for extremely accurate systems has arisen. These types of applications require little or no false accepts to increase underlying security and little or no false rejects to increase user convenience and acceptance and prevent the loss of time required for additional checks. Multimodal biometric systems are the best candidates for meeting security requirements because each modality adds assurance of the user’s identity. However, the extra time and actions required for collecting the additional biometrics can decrease user convenience and increase the time needed for user verification. Therefore, a single system which can capture multiple biometrics in a single touch would meet both the security and convenience requirements.
To meet this significant need, Lumidigm developed a multispectral whole-hand imaging system that captures hand shape, fingerprints, and palmprint modalities of a user’s hand by a single user interaction and has the advantages of fast acquisition time and high quality images. The initial development system collects 6 images from the hand, each using different illumination angles, polarization conditions, and wavelengths. Images are collecting using a single 14 megapixel CMOS color image which allows the system to achieve 500 dpi resolution over the entire 9” x 6” platen.
Example of image captures: full hand and metacarpal joint
Because the system is based on Lumidigm’s patented multispectral technology, high quality images are captured in adverse conditions, such as dry or wet hands, dirt, and inconsistent pressure. Software and algorithms have been developed which are able to fuse the multiple hand images together to create a single, high-quality, high-contrast image. This is then segmented for use by the multiple modalities’ matching algorithms. The matching scores are then fused together.
Performance of multispectral whole hand sensor
Initial studies were conducted by Lumidigm to determine the performance of the complete system using 134 unique hands and over 800 images. These studies have shown this to be a very promising technology for fast data collection and extremely high accuracy. On the data set collected, perfect separation was achieved when combining all modalities (Figure 3). This was not achievable based on any of the modalities alone.
Concept for compact multispectral whole hand product
The complete system includes hardware for collecting high quality images of the hand and software to collect images, process the images to the individual biometrics, and perform matching.
Whole Hand Technology Sheet (5.4 MiB)
Summary of the features and benefits of Lumidigm's multispectral, multimodal whole hand sensor technology
