An iris image scanned by a sensor
of new technology
POC is used to verify the iris pattern
for individual authentication.
Prototype of iris verification system
Prof. T. Aoki and his research group achieved developing a new technique
of automatic iris verification with
The iris recognition is one of the most important biometrics
authentication techniques, which identify individuals by scanning
biological characteristics such as faces, fingerprints and palm prints.
The research group applied the technique of
Phase-Only Correlation (POC)
--- a high-accuracy image matching technique using Fourier phase
information --- to iris verification. Prof. Aoki and his colleagues
already demonstrated that the POC algorithm exhibits an efficient
performance in fingerprint recognition. This time, the group shows that
the same technique is highly effective also for iris recognition.
Performance evaluation using
iris image database clearly demonstrated that the new iris
recognition algorithm exhibits world’s highest level of recognition
Conventional method of iris recognition is to transform iris images to
digital codes through feature extraction, and to compare the digital
codes of iris images for individual authentication. A major problem of
the conventional method is that the recognition performance is
significantly influenced by many parameters in image feature
extraction. The newly developed method, on the other hand, compares
iris images directly without feature extraction, and its identification
performance is stable and is hardly affected by conditions of capturing
iris images. The new technique will be widely applicable to access
control applications for housings on a daily basis.
These technical achievements will be announced at
IEEE International Conference on Image Processing (ICIP2005)
being held at Geneva, Italy, from September 11 to 14, 2005. At
ICIP2005, Prof. Aoki will also introduce new methods for fingerprint
recognition and 3D human face recognition, both for biometrics
authentication applications. All these results are collaborative
developments between Tohoku University and Yamatake Corporation.
Ahead of an official announcement at ICIP2005, an outline of the
technique was announced at the seminar for the
100th Anniversary of
Tohoku University on August 5, 2005.