- Tytuł:
- Improved reference image encryption methods based on 2k correction in the integer wavelet domain
- Autorzy:
-
Tuncer, Turker
Dogan, Sengul
Tadeusiewicz, Ryszard
Pławiak, Paweł - Powiązania:
- https://bibliotekanauki.pl/articles/330196.pdf
- Data publikacji:
- 2019
- Wydawca:
- Uniwersytet Zielonogórski. Oficyna Wydawnicza
- Tematy:
-
visually meaningful image encryption
2k correction
discrete wavelet transform
least significant bits embedding
szyfrowanie obrazu
dyskretna transforma falkowa
metoda szyfrowania - Opis:
- Many visually meaningful image encryption (VMIE) methods have been proposed in the literature using reference encryption. However, the most important problems of these methods are low visual quality and blindness. Owing to the low visual quality, the pre-encrypted image can be analyzed simply from the reference image and, in order to decrypt nonblind methods, users should use original reference images. In this paper, two novel reference image encryption methods based on the integer DWT (discrete wavelet transform) using 2k correction are proposed. These methods are blind and have high visual quality, as well as short execution times. The main aim of the proposed methods is to solve the problem of the three VMIE methods existing in the literature. The proposed methods mainly consist of the integer DWT, pre-encrypted image embedding by kLSBs (k least significant bits) and 2k correction. In the decryption phase, the integer DWT and preencrypted image extraction with the mod operator are used. Peak signal-to-noise ratio (PSNR) measures the performances of the proposed methods. Experimental results clearly illustrate that the proposed methods improve the visual quality of the reference image encryption methods. Overall, 2k correction and kLSBs provide high visual quality and blindness.
- Źródło:
-
International Journal of Applied Mathematics and Computer Science; 2019, 29, 4; 817-829
1641-876X
2083-8492 - Pojawia się w:
- International Journal of Applied Mathematics and Computer Science
- Dostawca treści:
- Biblioteka Nauki
Artykuł