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All Journal JUTEI (Jurnal Terapan Teknologi Informasi) Jurnal Informatika
Junius Karel Tampubolon
Universitas Kristen Duta Wacana
Computer Science & IT

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Journal : Jurnal Informatika

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Audio Fingerprint untuk Identifikasi File Audio Stefanus Irwan Yuanto; Junius Karel Tampubolon; Restyandito Restyandito
Jurnal Informatika Vol 3, No 1 (2007): Jurnal Informatika
Publisher : Universitas Kristen Duta Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4707.775 KB) | DOI: 10.21460/inf.2007.31.3

Abstract

Identifikasi file audio secara biner kurang efektif karena adanya format penyimpanan dan cara penyimpanan file audio yang berbeda-beda. Dengan menerapkan konsep audio fingerprint maka sinyal audio akan diidentifikasi dengan membandingkan sebuah kode unik berukuran kecil yang mewakili sinyal audio tersebut sehingga perbedaan format dan cara penyimpanan tidak berpengaruh besar terhadap sebuah proses identifikasi audio.
ANALISIS GAUSSIAN DAN EDGE CONNECTION DALAM PENAJAMAN DETEKSI TEPI MENGGUNAKAN METODE CANNY Kezia Satyawati; Junius Karel Tampubolon; R. Gunawan Santosa
Jurnal Informatika Vol 12, No 1 (2016): Jurnal Teknologi Komputer dan Informatika
Publisher : Universitas Kristen Duta Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (794.185 KB) | DOI: 10.21460/inf.2016.121.456

Abstract

Edge detection is one of many ways to get information from an image without big data storage needed. In this research, the edge detecting is done by implementing Canny edge detection algorithm. The focus of this research is to analyze the effect of two variables of the first process of Canny, Gaussian filter smoothing, that is size of matrix and variance, to the sharpening of edge detection. The testing is done by changing the size of the matrix and the value of the variance. The results showed that the best matrix size and variance for sharp edge detection is less than 30x30 and 30.
IMPLEMENTASI STEGANOGRAFI DENGAN METODE END OF FILE PADA TEKS YANG TERENKRIPSI MENGGUNAKAN BLOCK CIPHER RIVEST CODE-6 KE DALAM CITRA Andrew Chandra; Willy Sudiarto Raharjo; Junius Karel Tampubolon
Jurnal Informatika Vol 11, No 1 (2015): Jurnal Teknologi Komputer dan Informatika
Publisher : Universitas Kristen Duta Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (10165.31 KB) | DOI: 10.21460/inf.2015.111.420

Abstract

Datas or informations are very important assets nowdays, that is why we have to keep it safe so it will not fall into one who is do not have rights. There are several methods to maintain the confidentiality of datas/informations, which are cryptography and steganography. By using cryptographic Rivest Code-6 algorithm then the datas/informations is converted into a form that cannot be undestood, and then steganographic End of File algorithm the datas/informations is inserted into another media so that ordinaary people do not know the existence of the datas/informations. The results of this research tell that by using both algorithms the secret datas/informations can be hidden and read back properly. In addition there will be increase in file size reservoirs, where the increase in dependent on the size of the secret datas/informations and file size of the reservoir, while the length of the key to be isnerted into reservoir will remain  at 16 bytes.
Co-Authors Andrew Chandra Kezia Satyawati Raden Gunawan Santosa Rendy Setiawan Restyandito Stefanus Irwan Yuanto Willy Sudiarto Raharjo