&lt;title&gt;Discrimination of portraits using a hybrid parallel joint transform correlator system&lt;/title&gt;

Inaba, Rieko; Hashimoto, Asako; Kodate, Kashiko

doi:10.1117/12.347735

Cited by 3 publications

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“…The retrieval of a particular person was attempted, and a recognition rate exceeding 80% was obtained. This result verifies that this system is highly robust [10].…”

Section: Introductionsupporting

confidence: 85%

Proposal of meta‐data in a database for identification using face images

Inaba

Aizawa

Kodate

2005

Systems & Computers in Japan

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This paper proposes the introduction of meta‐data for efficient retrieval of particular personal data from a large‐scale face database. The face index is calculated from the feature parameters of the face, and is defined as the meta‐data. The purpose of this approach is to structure the database and to minimize the number of database matching operations in retrieval, so that the processing efficiency is improved. In this study, (1) Garson's facial index and (2) the three‐point face index are proposed as the face indexes. For verification, an experiment on face index introduction is performed, using an already constructed optical face recognition system, and an efficiency improvement is demonstrated. © 2005 Wiley Periodicals, Inc. Syst Comp Jpn, 36(3): 53–64, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/scj.10639

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“…The retrieval of a particular person was attempted, and a recognition rate exceeding 80% was obtained. This result verifies that this system is highly robust [10].…”

Section: Introductionsupporting

confidence: 85%

Proposal of meta‐data in a database for identification using face images

Inaba

Aizawa

Kodate

2005

Systems & Computers in Japan

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“…Therefore, this normalization procedure is important. We have also shown previously that the binarization of the input (and reference) images with appropriate adjustment of brightness is effective in improving the quality of the correlation signal (figure 4, [30]). It is also favourable for throughput improvement by compressing the image data to be transferred to the SLM.…”

Section: Principal Architecture Of a Facial Recognition Systemmentioning

confidence: 52%

“…Recognition experiments with arbitrary size of images [30]. In the investigation of criminals, snap shots, photographs on driving licences and passports could be the major clues.…”

Section: 21mentioning

confidence: 99%

Facial recognition by a compact parallel optical correlator

Kodate

Inaba

Watanabe

et al. 2002

Meas. Sci. Technol.

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With the progress of information technology, the need for an accurate personal identification system based on biological characteristics is increasing the demand for this type of security technology instead of conventional systems using ID cards or pin numbers. Among other features, the face is the most familiar element and is less subject to psychological resistance. As a simple and compact recognition system satisfying the required performance, we implemented a hybrid system based on the optical recognition principle using a multi-level zone plate as a Fourier-transform lens and we report the preliminary results of their application to face recognition. In this paper, we present the design procedure and fabrication process for an improved version of a second-generation compact parallel correlator (named COPaC II), the size of which is 20 × 24 × 43 cm3 and weight 6 kg. As a result, we obtained a low error rate of 0% as the false match rate and 0.3% as the false non-match rate, thus the COPaC II significant identification security level is sufficiently stable. With the aim of further enhancing the throughput and robustness, we conducted performance tests where the system is used as a computer log-in device and as a pre-screening device for crime investigation. In both experiments, a high rate of successful recognition, such as 90% recognition and 94% rejection rate for log-in, was obtained. Experiments on twins to check the disguise recognition, and on the effects of changes in brightness and arbitrary size of images to test its robustness are also included.

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Facial Recognition System with Compact Optical Parallel Correlator Using Vertical-Cavity Surface-Emitting Laser Array Module

Watanabe¹,

Arima²,

Kodate³

2004

Jpn. J. Appl. Phys.

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The angular distributions of ionic fragments produced by multi-electron dissociative ionization of diatomic molecules are calculated using a fieldionization Coulomb explosion model that includes dynamic rotation of the molecule in the laser field. The majority of dynamic alignment occurs on the leading edge of the laser pulse at low intensities before the laser intensity reaches the dissociative ionization threshold. This makes the degree of alignment sensitive to the precise value of the dissociative ionization threshold. Measuring the total ion signal for different pulse-lengths enables angledependent dissociative ionization to be distinguished from dynamic alignment. Increased alignment with long pulses is an unambiguous sign that the molecules are forced into alignment with laser field.

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<title>Discrimination of portraits using a hybrid parallel joint transform correlator system</title>

Cited by 3 publications

References 0 publications

Proposal of meta‐data in a database for identification using face images

Proposal of meta‐data in a database for identification using face images

Facial recognition by a compact parallel optical correlator

Facial Recognition System with Compact Optical Parallel Correlator Using Vertical-Cavity Surface-Emitting Laser Array Module

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