Ultrahigh-Speed Optical Correlation System Using Holographic Disc

Watanabe, Eiji; Ichikawa, Yūki; Akiyama, Reiko; Kodate, Kashiko

doi:10.1143/jjap.47.5964

Cited by 17 publications

(10 citation statements)

References 7 publications

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“…[4][5][6][7][8][9][10] In this technique, correlation calculations are performed by irradiating image data to be searched on image data recorded as a hologram in a holographic disc. [11][12][13][14][15][16] Correlation is performed at the speed of light as the intensity of the beam diffracted from the hologram indicates the correlation rate between the image data. We constructed an optical correlator with this holographic optical correlation technique.…”

Section: Introductionmentioning

confidence: 99%

Improvement of correlation speed of holographic optical correlator by low-correlation data interleaving

Hoshizawa¹,

Saito²,

Ikeda³

et al. 2019

Jpn. J. Appl. Phys.

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With increased use of smartphones and social networking services, the amount of unstructured image data has been increasing significantly. A high-speed search method is required to use such data for big data analysis. Holographic optical correlation is a promising technique for this purpose. This study introduces a recording method that realizes speedup in an optical correlator. High-density recording is effective for achieving not only speedup, but also high capacity. However, the high-density recording by shortening the shift amount in shift-multiplexed recording results in a large error in the calculated correlation rate owing to crosstalk from adjacent holograms. To suppress this crosstalk, we propose a low-correlation data interleaving method that rearranges the recording order of image data based on the correlation rate with the last recorded image data. We analytically and experimentally confirmed that the proposed method improves the recording density and the correlation speed to 1.33 times.

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Section: Introductionmentioning

confidence: 99%

Improvement of correlation speed of holographic optical correlator by low-correlation data interleaving

Hoshizawa¹,

Saito²,

Ikeda³

et al. 2019

Jpn. J. Appl. Phys.

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“…Using optical filters to measure similarity between images is being considered for decades [3]. Since optical filtering basically rely on using spatial Fourier transform of images in frequency domain, practically it can be achieved by use of simple optical elements such as converging lenses [4]. Furthermore, regarding to the parallel nature of optical processing; since light waves travel in parallel, all the information of an image can be searched at the speed of light and it can be considered as real-time processing.…”

Section: Introductionmentioning

confidence: 99%

Frequency Domain Approach for Face Recognition Using Optical Vanderlugt Filters

Heidari¹,

Kaatuzian²,

Alizadeh³

2016

OPJ

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In this paper human face machine identification is experienced using optical correlation techniques in spatial frequency domain. This approach is tested on ORL dataset of faces which includes face images of 40 subjects, each in 10 different positions. The examined optical setup relies on optical correlation based on developing optical Vanderlugt filters and its basics are described in this article. With the limitation of face database of 40 persons, the recognition is examined successfully with nearly 100% of accuracy in matching the input images with their respective Vanderlugt synthesized filters. Software simulation is implemented by using MATLAB for face identification.

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“…In regard to face-recognition and finger-recognition systems, several techniques for distinguishing this shape information have already been reported. As one of these techniques, face-recognition with edge detection has been developed, and it has achieved recognition results with high accuracy [2]. However, effective techniques for distinguishing colour and texture have not been established yet.…”

Section: Introductionmentioning

confidence: 99%

Compact slot-in-type optical correlator for retrieving shape, colour, and texture

Kuboyama

Moriyama

Yamaguchi

et al. 2011

Holography: Advances and Modern Trends II

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A compact optical correlator applicable to the retrieval of colour and texture as well as shape information was developed. A new technique for retrieving colour and texture information by using a slot-in-type compact joint-transform correlator (JTC) with minimum size (140 (W) × 220 (L) × 40 mm (H)) was developed. The developed techniques were used to retrieve images of fruits and vegetables, taken by the digital camera. The developed technique can retrieve images of certain fruits, such as an apple, from images of many different fruits and vegetables. It will open up a new area of retrieval techniques for ambiguous images based on shape, colour and texture information.

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Ultrahigh-Speed Optical Correlation System Using Holographic Disc

Cited by 17 publications

References 7 publications

Improvement of correlation speed of holographic optical correlator by low-correlation data interleaving

Improvement of correlation speed of holographic optical correlator by low-correlation data interleaving

Frequency Domain Approach for Face Recognition Using Optical Vanderlugt Filters

Compact slot-in-type optical correlator for retrieving shape, colour, and texture

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