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Journal : TELKOMNIKA (Telecommunication Computing Electronics and Control)

Hand gesture recognition using discrete wavelet transform and hidden Markov models Erizka Banuwati Candrasari; Ledya Novamizanti; Suci Aulia
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 5: October 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v18i5.13725

Abstract

Gesture recognition based on computer-vision is an important part of human-computer interaction. But it lacks in several points, that was image brightness, recognition time, and accuracy. Because of that goal of this research was to create a hand gesture recognition system that had good performances using discrete wavelet transform and hidden Markov models. The first process was pre-processing, which done by resizing the image to 128x128 pixels and then segmented the skin color. The second process was feature extraction using the discrete wavelet transform. The result was the feature value in the form of a feature vector from the image. The last process was gesture classification using hidden Markov models to calculate the highest probability of feature matrix which had obtained from the feature extraction process. The result of the system had 72% of accuracy using 150 training and 100 test data images that consist five gestures. The newness thing found in this experiment were the effect of acquisition and pre-processing. The accuracy had been escalated by 14% compared to Sebastien’s dataset at 58%. The increment effect propped by brightness and contrast value.
Robust audio watermarking based on transform domain and SVD with compressive sampling framework Ledya Novamizanti; Gelar Budiman; Elsa Nur Fitri Astuti
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 2: April 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v18i2.14773

Abstract

The growth of the internet and digital data has resulted forgery, modification and sharing of digital data without property rights. Audio watermarking is one of a solution to protect the copyright of an audio from copyright infringement. This paper proposes an audio watermarking method which is robust against attacks and high capacity. First, a synchronization bit is added to the audio host. After the audio host is decomposed by Lifting Wavelet Transform (LWT), then choose a subband from the output of LWT to be transformed by discrete cosine transform (DCT). Next, the matrix of the signal from DCT is selected for the singular value decomposition (SVD) process, so that is obtained U, S and V matrix. S matrix is embedded with the watermark. Before the embedding process, the watermark image is compressed by Compressive Sampling. The results show that the proposed watermarking system is highly robust against a kind attack of LPF, resampling, and linear speed change which is proven by its BER is zero.
DWT-SMM-based audio steganography with RSA encryption and compressive sampling Fikri Adhanadi; Ledya Novamizanti; Gelar Budiman
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 2: April 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v18i2.14833

Abstract

Problems related to confidentiality in information exchange are very important in the digital computer era. Audio steganography is a form of a solution that infuses information into digital audio, and utilizes the limitations of the human hearing system in understanding and detecting sound waves. The steganography system applies compressive sampling (CS) to the process of acquisition and compression of bits in binary images. Rivest, Shamir, and Adleman (RSA) algorithms are used as a system for securing binary image information by generating encryption and decryption key pairs before the process is embedded. The insertion method uses statistical mean manipulation (SMM) in the wavelet domain and low frequency sub-band by dividing the audio frequency sub-band using discrete wavelet transform (DWT) first. The optimal results by using our system are the signal-to-noise ratio (SNR) above 45 decibel (dB) and 5.3833 bit per second (bps) of capacity also our system has resistant to attack filtering, noise, resampling and compression attacks.
Modified DCT-based Audio Watermarking Optimization using Genetics Algorithm Ledya Novamizanti; Gelar Budiman; Irma Safitri
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 6: December 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i6.10111

Abstract

Ease process digital data information exchange impact on the increase in cases of copyright infringement. Audio watermarking is one solution in providing protection for the owner of the work. This research aims to optimize the insertion parameters on Modified Discrete Cosine Transform (M-DCT) based audio watermarking using a genetic algorithm, to produce better audio resistance. MDCT is applied after reading host audio, then embedding in MDCT domain is applied by Quantization Index Modulation (QIM) technique. Insertion within the MDCT domain is capable of generating a high imperceptible watermarked audio due to its overlapping frame system. The system is optimized using genetic algorithms to improve the value of imperceptibility and robustness in audio watermarking. In this research, the average SNR reaches 20 dB, and ODG reaches -0.062. The subjective quality testing on the system obtains an average MOS of 4.22 out of five songs tested. In addition, the system is able to withstand several attacks. The use of M-DCT in audio watermaking is capable of producing excellent imperceptibility and better watermark robustness.
Co-Authors ABDULFATTAH, MUHAMMAD EFAN Aditya, Ghanes Mahesa ADRIAN KURNIA, ADRIAN Adviatmadja, Sebastian Danny Agnes Gabriela Putri Winata Agung Nugroho Jati Ahmad Akbar Khatami Ahmad Alfi Adz Dzikri Ahmad Fauzan Fauzan Aldra Kasyfil Aziz Amini, Siti Aisyah Andy Ruhendy Putra ANGGUNMEKA LUHUR PRASASTI Annida, Nurafifah Aqilah Mamur Tanjung , Najmi Arindaka, Hafizhan Bhamakerti Armanda Nur Fadhlillah Ashri Dinimaharawati Aulia Wibowo Bambang Hidayat Cindy Angelista Deltika Cucu Alex Zaenudin Danny Adviatmadja, Sebastian David Chandra De Lima, Nadya Viana Dedy Rahman Wijaya Denny Meilika Setiawati Desri Kristina Silalahi Dias Wardana Dick Maryopi Dien Rahmawati Dimitri Mahayana Dine Octavia Kumalasari Eko Susatio Elsa Nur Fitri Astuti Elsa Nur Fitri Astuti Erizka Banuwati Candrasari Fahriansyah, Ardy Fajri, Farhan Ulil FARDAN FARDAN, FARDAN Faris Fadhlur Rachman Fathiyya, Dhiya Faza, Lulu Balqis Zianka Felix Pidha Hilman Fenty Alia Fikri Adhanadi Firdaus, Rifqi Fadhilah Fityanul Aditya Fityanul Akhyar Fredigo, Agno Gelar Budiman Gogi Gautama Al Hadiid HAFIZHANA, YASQI Hakim, Farhan Nur HANNAN HARAHAP, HANNAN Hanum, Mirza Alifia Harist Gymnovriza Hermawan, Laksamana Mikhail Husneni Mukhtar I Gusti Putu Agung Satria Bayu Mahendra I N Apraz Ramatryana I Nyoman Apraz Ramatryana Ilman, Mukhamad Zidni Imansyah Basudewa , Muhammad Indra Aulia Intan Sulviyani Irma Safitri Ivandy Chaniago Ivany Sesa Rehadi Iwan Iwut Iwan Iwut Tritoasmoro Iwut Tritoasmoro, Iwan Jangkung Raharjo Koredianto Usman Kurnia Ramadani Kurniawan Nur Ramadhani Mahanani, Edo Lutfi Mahfuz, Muhammad Rafi Marlindia Ike Sari Maulana , Muhammad Dafa Mertu, Aidi Mirsa Bayu Prasetyo Mochamad Reyhand Landrenzy Zulfikar Mohamad Alfaj’ri Muhammad Alief Hidayah Baso Muhammad Azwar Zulmi Muhammad Biyan Priatama Muhammad Fikri Aufa Muhammad Hablul Barri Muhammad Harits Ibrahim Muhammad Iqbal Rabbani Muhammad Raia Pratama Putra Wibowo Muhammad Rayhan Ghifari Muhammad Rizqy Alfarisi Muhammad Sindu Ramadhan Muhammad Wahyu Setiawan Nabila Setya Utami Novelita Dwi Miranda Novialdy Nugroho Santoso Nur Ibrahim Paradila I., Dela Parjuangan, Sabam Pinasthika Aulia Fadhila Pratama , Nyoman Raflly Prawita, Fat’hah Noor Priyambodo, Afif Putra, Afi Athallah Syamsulhadi Putu Harry Gunawan R Ricki Juniansyah R. Yunendah Nur Fu’adah Rabby Fitriana Adawiyah Rahma Nur Auliasari Rahmawati, Aulya RAMATRYANA, I NYOMAN APRAZ Randy Hamzah Hardianto Ratri Dwi Atmaja Razendra Zahran Firdaus Reyhan Radifan Jordy RIANTIARNI, TITA Rita Magdalena Rita Purnamasari Rita Rismala Rizal, Mochammad Fahru Rochmawati Ruslan , Ramah Rinaldi Ryan Anggara Sa'idah, Sofia Sari, Rina Media Satria Mandala Sa’idah, Sofia Setyagraha , Muhammad Rafi Mahfuz SIDDIK, MUHAMMAD ARSYAD Siti Azizah Suci Aulia Sugondo Hadiyoso Sulistyowati, Syifa Dwi Suryo Adhi Wibowo Susatio, Eko Susi Diriyanti Novalina Syamsul Rizal Syamsul Rizal Tanjung, Najmi Aqilah Mamur Thomhert Suprapto Siadari Thoriq Bayu Aji Tora Fahrudin Wahidin Wahidin WANANDA, PUTU DEBBY WIBOWO, BHISMA ADI Wicaksono, Muhammad Rievnuansyah YUYUN SITI ROHMAH Zahra Zettira Zukhrufuljannah Zaky, Pavel Manaf El