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Catherine Hall
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The wide use of digital images and videos in various applications warrant serious attention to the security and privacy issues today. Several encryption techniques have been proposed in recent years as feasible solutions to the protection of digital images and videos. In many applications, such as pay-per-view videos,pay-TV and video on demand, one of the required features is that the quality of the video data be degraded only partially by some encryption technique and the encrypted data must still be partially perceptible. This feature referred to as ‘Perceptual encryption’ is the encryption algorithm that degrades the quality of media content according to security or quality requirements. In this work we propose a simple yet efficient technique for realizing perceptual encryption using geometric objects as kernels based on which the pixels are permuted. Confusion aspect that is required is realized by inserting the kernel on the image and thereby performing transposition of pixels based on the kernel formed out of geometric objects. The various parameters of geometric objects, number of objects and the position of the objects/kernel in the image are used as the key for encryption and later on for decryption. Further a choice of quality of the image required i.e., different levels of degradation is provided by adjusting the above parameters of the objects/kernel.From the results obtained it is evident that the proposed method which is more apt for perceptual encryption can also be used effectively for full image encryption with acceptable level of security.
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De noden in Vlaamse erfgoedbibliotheken voor de preservering, conservering en restauratie van hun bewaarcollecties zijn hoog en de huidige middelen te klein om hieraan te voldoen. In deze tijden van economische crisis en budgettaire krapte is er dan ook de (interne) vraag en de (externe) verwachting om alternatieve financiering te zoeken. Dit gaat hand in hand met het feit dat deze instellingen als jonge sector nog op zoek zijn naar een breder maatschappelijk draagvlak voor hun cultureel-erfgoedwerking. In het buitenland komt men aan deze wensen tegemoet via ‘Adopt-a-Book’-programma’s voor bedrijven en mecenassen. Tegenwoordig gebeurt fondsenwerving echter steeds vaker online - door het inzetten van sociale media en via zogenaamde crowdfundingplatformen op het internet – en bij het grote publiek. Samen met diverse deskundige partners (zoals de VVBAD, de Koning Boudewijnstichting, het Vlaams Fonds voor de Letteren en de Erfgoedbibliotheek Hendrik Conscience) wil de Vlaamse Erfgoedbibliotheek onderzoeken of deze concepten ook toepasbaar zijn in Vlaanderen. Concreet doen we dit door een online fondsenwervingsplaform op te richten waarop erfgoedbibliotheken hun eigen ‘Adopt-a-Book’-projecten in de etalage kunnen zetten. Dit experimenteel platform, dat potentiële schenkers en ‘goede doelen’ met elkaar in contact brengt, wil niet alleen geld ophalen voor conserveringsprojecten van erfgoedbibliotheken. Het verbreedt ook het sociale netwerk en cultureel-erfgoedgemeenschap van de betrokken instellingen.
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The wide use of digital images and videos in various applications warrant serious attention to the security and privacy issues today. Several encryption techniques have been proposed in recent years as feasible solutions to the protection of digital images and videos. In many applications, such as pay-per-view videos,pay-TV and video on demand, one of the required features is that the quality of the video data be degraded only partially by some encryption technique and the encrypted data must still be partially perceptible. This feature referred to as ‘Perceptual encryption’ is the encryption algorithm that degrades the quality of media content according to security or quality requirements. In this work we propose a simple yet efficient technique for realizing perceptual encryption using geometric objects as kernels based on which the pixels are permuted. Confusion aspect that is required is realized by inserting the kernel on the image and thereby performing transposition of pixels based on the kernel formed out of geometric objects. The various parameters of geometric objects, number of objects and the position of the objects/kernel in the image are used as the key for encryption and later on for decryption. Further a choice of quality of the image required i.e., different levels of degradation is provided by adjusting the above parameters of the objects/kernel.From the results obtained it is evident that the proposed method which is more apt for perceptual encryption can also be used effectively for full image encryption with acceptable level of security.
A NOVEL PERCEPTUAL IMAGE ENCRYPTION SCHEME USING GEOMETRIC OBJECTS BASED KERNEL
A NOVEL PERCEPTUAL IMAGE ENCRYPTION SCHEME USING GEOMETRIC OBJECTS BASED KERNEL
ijcsit
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Crowdfunding: Wie niet vraagt, niet wint (Informatie aan Zee 2013)
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Vlaamse Erfgoedbibliotheken
Biometrics is science of measuring and statistically analyzing biological data. Biometric system establishes identity of a person based on unique physical or behavioural characteristic possessed by an individual.Behavioural biometrics measures characteristics which are acquired naturally over time. Physical biometrics measures inherent physical characteristics on a n individual. Over the last few decades enormous attention is drawn towards ocular biometrics. Cues provided by ocular region have led to exploration of newer traits. Feasibility of periocular region as a useful biometric trait has been explored recently. With the promising results of preliminary examination, research towards periocular region is currently gaining lot of prominence. Researchers have analyzed various techniques of feature extraction and classification in the periocular region. The current paper investigates the effect of using Lower Central Periocular Region (LCPR) for identification. The results obtained are comparable with those acquired for the entire periocular region with an advantage of reduced periocular area
PERIOCULAR RECOGNITION USING REDUCED FEATURES
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ijcsit
2007 Sep. Praktikum Staudengärtnerei
2007 Sep. Praktikum Staudengärtnerei
Patrick S. Jungfer
Analitycy Okazje.info przygotowali raport, prezentujący zachowania zakupowe internautów w ramach kategorii Fotografia, rankingi najpopularniejszych produktów oraz wyjaśnienie najważniejszych parametrów sprzętu fotograficznego. Raport dostępny również pod adresem: http://www.okazje.info.pl/pdf/okazje_info-preferencje_zakupowe_w_kategorii_Fotografia-raport_czerwiec_2012.pdf
Preferencje zakupowe w kategorii fotografia raport okazje.info, czerwiec 2012
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A NOVEL PERCEPTUAL IMAGE ENCRYPTION SCHEME USING GEOMETRIC OBJECTS BASED KERNEL
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PERIOCULAR RECOGNITION USING REDUCED FEATURES
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2007 Sep. Praktikum Staudengärtnerei
2007 Sep. Praktikum Staudengärtnerei
Preferencje zakupowe w kategorii fotografia raport okazje.info, czerwiec 2012
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