Matches in SemOpenAlex for { <https://semopenalex.org/work/W4281291029> ?p ?o ?g. }
Showing items 1 to 65 of
65
with 100 items per page.
- W4281291029 endingPage "35" @default.
- W4281291029 startingPage "24" @default.
- W4281291029 abstract "Informasi dalam bentuk multimedia digital mudah dilakukan duplikasi dan modifikasi oleh pihak-pihak yang mungkin saja tidak memiliki izin dari pemilik yang sah. Hal ini dapat menimbulkan persoalan pelanggaran hak cipta atas informasi multimedia tersebut. Salah satu cara untuk mengatasi persoalan tersebut adalah dengan digital watermarking. Dalam artikel ini dibahas mengenai teknik watermarking pada citra digital menggunakan contourlet transform (CT) yang digabung dengan discrete cosine transform (DCT) dan perhitungan noise visibility function (NVF). Watermark disisipkan pada koefisien DCT dari subband hasil transformasi contourlet level 2. Penyisipan watermark dilakukan dengan memperhitungkan nilai NVF koefisien CT dari subband yang digunakan. Untuk daerah yang bertekstur, watermark akan disisipkan lebih kuat daripada daerah yang datar. Dari hasil uji coba diperoleh bahwa citra yang telah disisipi watermark mempunyai kualitas yang baik dengan rata-rata nilai peak signal to noise ratio (PSNR) lebih besar dari 35 dB, dan watermark dapat diekstraksi kembali dengan baik dengan rata-rata nilai bit correct ratio (BCR) lebih besar dari 98%. Watermark masih tahan terhadap kompresi JPEG dengan faktor kualitas Q 9, penambahan noise Gaussian sampai 10%, cropping sampai 25%, dan scaling 75% dan 125%, tetapi tidak tahan terhadap rotasi. Information in the form of digital multimedia can easily be duplicated and modified by parties who may not have the permission of the legal owner. This can lead to issues of copyright infringement of the multimedia information. One solution to overcome this problem is digital watermarking. This article discusses watermarking technique in digital images using contourlet transform (CT) combined with discrete cosine transform (DCT) and noise visibility function (NVF) calculation. Watermark is inserted in the DCT coefficients of level 2 contourlet transform subband. Watermark insertion is done by calculating the NVF value of the CT coefficients of the subband used. For textured areas, the watermark will be inserted stronger than flat areas. From the test results, it is found that the watermarked image has good quality with an average peak signal to noise ratio (PSNR) value greater than 35 dB, and the watermark can be extracted back well with an average bit correct ratio (BCR) value greater than 98%. Watermark is still resistant to JPEG compression with a quality factor Q greater than 9, Gaussian noise addition up to 10%, cropping up to 25%, scaling 75% and 125%, but not resistant to rotation." @default.
- W4281291029 created "2022-05-24" @default.
- W4281291029 creator A5008922727 @default.
- W4281291029 creator A5062699461 @default.
- W4281291029 creator A5071842426 @default.
- W4281291029 creator A5078116424 @default.
- W4281291029 date "2022-05-23" @default.
- W4281291029 modified "2023-09-26" @default.
- W4281291029 title "Watermarking Citra Digital menggunakan Contourlet Transform, Discrete Cosine Transform dan Noise Visibility Function" @default.
- W4281291029 doi "https://doi.org/10.15575/telka.v8n1.24-35" @default.
- W4281291029 hasPublicationYear "2022" @default.
- W4281291029 type Work @default.
- W4281291029 citedByCount "0" @default.
- W4281291029 crossrefType "journal-article" @default.
- W4281291029 hasAuthorship W4281291029A5008922727 @default.
- W4281291029 hasAuthorship W4281291029A5062699461 @default.
- W4281291029 hasAuthorship W4281291029A5071842426 @default.
- W4281291029 hasAuthorship W4281291029A5078116424 @default.
- W4281291029 hasBestOaLocation W42812910291 @default.
- W4281291029 hasConcept C11413529 @default.
- W4281291029 hasConcept C115961682 @default.
- W4281291029 hasConcept C150817343 @default.
- W4281291029 hasConcept C154945302 @default.
- W4281291029 hasConcept C164112704 @default.
- W4281291029 hasConcept C196216189 @default.
- W4281291029 hasConcept C20479862 @default.
- W4281291029 hasConcept C2221639 @default.
- W4281291029 hasConcept C31972630 @default.
- W4281291029 hasConcept C33923547 @default.
- W4281291029 hasConcept C41008148 @default.
- W4281291029 hasConcept C47432892 @default.
- W4281291029 hasConcept C99498987 @default.
- W4281291029 hasConceptScore W4281291029C11413529 @default.
- W4281291029 hasConceptScore W4281291029C115961682 @default.
- W4281291029 hasConceptScore W4281291029C150817343 @default.
- W4281291029 hasConceptScore W4281291029C154945302 @default.
- W4281291029 hasConceptScore W4281291029C164112704 @default.
- W4281291029 hasConceptScore W4281291029C196216189 @default.
- W4281291029 hasConceptScore W4281291029C20479862 @default.
- W4281291029 hasConceptScore W4281291029C2221639 @default.
- W4281291029 hasConceptScore W4281291029C31972630 @default.
- W4281291029 hasConceptScore W4281291029C33923547 @default.
- W4281291029 hasConceptScore W4281291029C41008148 @default.
- W4281291029 hasConceptScore W4281291029C47432892 @default.
- W4281291029 hasConceptScore W4281291029C99498987 @default.
- W4281291029 hasIssue "1" @default.
- W4281291029 hasLocation W42812910291 @default.
- W4281291029 hasOpenAccess W4281291029 @default.
- W4281291029 hasPrimaryLocation W42812910291 @default.
- W4281291029 hasRelatedWork W1495544041 @default.
- W4281291029 hasRelatedWork W1967073369 @default.
- W4281291029 hasRelatedWork W2005691973 @default.
- W4281291029 hasRelatedWork W2027952668 @default.
- W4281291029 hasRelatedWork W2079789955 @default.
- W4281291029 hasRelatedWork W2104172174 @default.
- W4281291029 hasRelatedWork W2123435831 @default.
- W4281291029 hasRelatedWork W2373523051 @default.
- W4281291029 hasRelatedWork W2610369592 @default.
- W4281291029 hasRelatedWork W2939599337 @default.
- W4281291029 hasVolume "8" @default.
- W4281291029 isParatext "false" @default.
- W4281291029 isRetracted "false" @default.
- W4281291029 workType "article" @default.