A Wiener filter based correlation method intended to evaluate effectiveness of holographic security devices

Janucki, Jacek; Owsik, J.

doi:10.1016/s0030-4018(03)01208-2

Cited by 11 publications

(3 citation statements)

References 11 publications

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“…Burage-Lefebvre et al compute digital reconstructions of particle holograms based on the wavelet transform [4]. Janucki et al use a Wiener filter to quantitatively assess the quality of holograms [13]. Then, there are automatic inspection systems for holograms with multiple patterns by Hyuk-Joong and Tae-Hyoung [14,18].…”

Section: Related Workmentioning

confidence: 99%

Mobile interactive hologram verification

Härtl

Grubert

Schmalstieg

et al. 2013

2013 IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

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Verification of paper documents is an important part of checking a person's identity, authorization for access or simply establishing a trusted currency. Many documents such as passports or paper bills include holograms or other view-dependent elements that are difficult to forge and therefore are used to verify the genuineness of that document. View-dependent elements change their appearance based both on viewing direction and dominant light sources, thus it requires special knowledge and training to accurately distinguish original elements from forgeries. We present an interactive application for mobile devices that integrates the recognition of the documents with the interactive verification of view-dependent elements. The system recognizes and tracks the paper document, provides user guidance for view alignment and presents a stored image of the element's appearance depending on the current view of the document also recording user decisions. We describe how to model and capture the underlying spatially varying BRDF representation of view-dependent elements. Furthermore, we evaluate this approach within a user study and demonstrate that such a setup captures images that are recognizable and that can be correctly verified.

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Section: Related Workmentioning

confidence: 99%

Mobile interactive hologram verification

Härtl

Grubert

Schmalstieg

et al. 2013

2013 IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

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“…At verification step, normalized cross correlation (NCC) is used for estimated hologram positions throughout the registered stack. [7] has presented a method based on correlation analysis of hologram patterns which uses The Wiener filter algorithm. In [8], fake currency detection has been conducted by using image processing steps including image acquisition, grey scale conversion, edge detection, image segmentation, characteristic extraction and calculation of intensity.…”

Section: Introductionmentioning

confidence: 99%

Open-Set Learning-Based Hologram Verification System Using Generative Adversarial Networks

2022

IEEE Access

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“…Up to now, there has been much literature on special techniques to protect confidential images, such as [1,2,4,5,7,8,9,10,11]. Most of these techniques encrypt the confidential images (i.e.…”

Section: Introductionmentioning

confidence: 99%

A new scheme to protect confidential images

Chang

Hwang

18th International Conference on Advanced Information Networking and Applications, 2004. AINA 2004.

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A new and efficient scheme to protect confidential images is proposed in this paper. The proposed scheme does not use a secret key to protect confidential images as conventional encryption schemes do, and nor are there cipher images corresponding to the confidential images. A confidential image can be reconstructed easily by the cooperation of all the participants in a special group. Each participant of the special group holds a virtual image which can show any picture, and she/he uses this virtual image to cooperate with the other legal participants to reconstruct the confidential image. These pictures shown in the virtual images are significantly different and are irrelated to each other. Besides, they bear no relation to the confidential image either. According to our experimental results, each reconstructed confidential image does turn out to look like the original confidential image through our human visual system and its PSNR is greater than 34 dB.

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A Wiener filter based correlation method intended to evaluate effectiveness of holographic security devices

Cited by 11 publications

References 11 publications

Mobile interactive hologram verification

Mobile interactive hologram verification

Open-Set Learning-Based Hologram Verification System Using Generative Adversarial Networks

A new scheme to protect confidential images

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