An Enhancement of Data Hiding Imperceptibility using Slantlet Transform (SLT)
| Autor: | Christy Atika Sari, De Rosal Ignatius Moses Setiadi, Noor Ageng Setiyanto, Daurat Sinaga, Eko Hari Rachmawanto |
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| Rok vydání: | 2018 |
| Předmět: |
Discrete wavelet transform
lcsh:Computer engineering. Computer hardware Steganography Pixel Computer science business.industry slantlet transform discrete wavelet transofrm discrete cosine transform image ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION lcsh:TK7885-7895 Pattern recognition Cryptography Virtual hospital Information hiding Discrete cosine transform Artificial intelligence business Coding (social sciences) |
| Zdroj: | Kinetik, Vol 4, Iss 1, Pp 87-98 (2018) |
| ISSN: | 2503-2267 2503-2259 |
| DOI: | 10.22219/kinetik.v4i1.702 |
| Popis: | This study proposes a hybrid technique in securing image data that will be applied in telemedicine in future. Based on the web-based ENT diagnosis system using Virtual Hospital Server (VHS), patients are able to submit their physiological signals and multimedia data through the internet. In telemedicine system, image data need more secure to protect data patients in web. Cryptography and steganography are techniques that can be used to secure image data implementation. In this study, steganography method has been applied using hybrid between Discrete Cosine Transform (DCT) and Slantlet Transform (SLT) technique. DCT is calculated on blocks of independent pixels, a coding error causes discontinuity between blocks resulting in annoying blocking artifact. While SLT applies on entire image and offers better energy compaction compare to DCT without any blocking artifact. Furthermore, SLT splits component into numerous frequency bands called sub bands or octave bands. It is known that SLT is a better than DWT based scheme and better time localization. Weakness of DCT is eliminated by SLT that employ an improved version of the usual Discrete Wavelet Transform (DWT). Some comparison of technique is included in this study to show the capability of the hybrid SLT and DCT. Experimental results show that optimum imperceptibility is achieved. |
| Databáze: | OpenAIRE |
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