Temat: IRIS - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Detection and molecular characterization of the Iris severe mosaic virus-Ir isolate from Iran
Autorzy:: Nateqi, M.
Habibi, M.K.
Dizadji, A.
Parizad, S.
Powiązania:: https://bibliotekanauki.pl/articles/66139.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: detection
molecular characteristics
iris severe mosaic virus
isolate
phylogenesis
iris
Iridaceae
ornamental plant
Iran
Opis:: Iris belongs to the Iridaceae family. It is one of the most important pharmaceutical and ornamental plants in the world. To assess the potyvirus incidence in natural resources of iris plants in Iran, Antigen Coated-Plate ELISA (ACP-ELISA) was performed on 490 symptomatic rhizomatous iris leaf samples, which detected the potyvirus in 36.7% of the samples. Genomic 3’ end of one mechanically non-transmitted potyvirus isolate, comprising a 3’ untranslated region (390 bp) and C-terminus of the coat protein (CP) gene (459 bp), was amplified by reverse transcription polymerase chain reaction (RT-PCR), which was ligated into pTG19-T vector. The nucleotide sequence of amplicons was compared with related sequences, using Blastn software available at NCBI GenBank, and showed the highest similarity with Iris severe mosaic virus (ISMV) isolates. The nucleotide and deduced amino acid sequence of the CP C-terminus region was more than 83% identical with other ISMV isolates, therefore this isolate was designated as ISMV-Ir. This new ISMV isolate is closely related to the Chinese ISMV-PHz in phylogenetic analysis, based on the partial nucleotide and deduced amino acid sequence of the CP region. This is the first report of ISMV occurrence on Iris spp. in Iran.
Źródło:: Journal of Plant Protection Research; 2015, 55, 3
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Verification of iris image authenticity using fragile watermarking
Autorzy:: Czajka, A.
Kasprzak, W.
Wilkowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/200546.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: biometric data authentication
iris recognition
steganography
watermarking
dane biometryczne
rozpoznawanie tęczówki
steganografia
znak wodny
Opis:: This paper proposes and evaluates a watermarking-based approach to certify the authenticity of iris images when they are captured by a genuine equipment. In the proposed method, the iris images are secretly signed before being used in biometric processes, and the resulting signature is embedded into the JPEG carrier image in the DCT domain in a data-dependent way. Any alteration of the original (certified) image makes the signature no longer corresponding to this image and this change can be quickly identified at the receiver site. Hence, it is called fragile watermarking to differentiate this method from regular watermarking that should present some robustness against image alterations. There is no need to attach any auxiliary signature data, hence the existing, already standardized transmission channels and storage protocols may be used. The embedding procedure requires to remove some part of the original information. But, by using the BATH dataset comprising 32 000 iris images collected for 1 600 distinct eyes, we verify that the proposed alterations have no impact on iris recognition reliability, although statistically significant, small differences in genuine score distributions are observed when the watermark is embedded to both the enrollment and verification iris images. This is a unique evaluation of how the watermark embedding of digital signatures into the ISO CROPPED iris images (during the enrollment, verification or both) influences the reliability of a well-established, commercial iris recognition methodology. Without loss in generality, this approach is targeted to biometric-enabled ID documents that deploy iris data to authenticate the holder of the document.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 4; 807-819
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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