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ANALISA PENGARUH PERBEDAAN MEDIUM AIR DAN UDARA TERHADAP KALIBRASI KAMERA DENGAN MENGGUNAKAN METODE ZHANG Nurtantio Andono, Pulung; Shidik, Guruh Fajar; Pramunendar, Ricardus Anggi; Supriyanto, Catur; Hariadi, Mochamad
Semantik Vol 2, No 1 (2012): Prosiding Semantik 2012
Publisher : Semantik

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Abstract

Pada paper ini kami melakukan penelitian untuk mencari pengaruh perbedaan medium terhadap kalibrasi kamera. Kami melakukan komparasi analisa kalibrasi kamera yang dilakukan di udara dan di air, untuk mengetahui tingkat perbedaannya. Pada studi komparasi analisa ini kami menggunakan tehnik kalibrasi Zhang yang sudah biasa digunakan untuk kalibrasi kamera. Hasil experimen yang diukur merupakan perbandingan nilai focal length. Dari hasil percobaan yang dilakukan, didapatkan bahwa adanya perbedaan nilai focal length kamera pada medium air dan udara sebesar 36%.Kata kunci : Kalibrasi Kamera, Metode Zhang
Performance Evaluation of Bonding Techniques at Wireless 802.11n Shidik, Guruh Fajar; Noh, Zul Azri bin Muhamad
TELKOMNIKA Telecommunication, Computing, Electronics and Control Vol 11, No 1: March 2013
Publisher : Universitas Ahmad Dahlan

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Abstract

We conduct research with testbed experimental at Point to Point topology use wireless 802.11n. We applied Interface Bonding and Channel Bonding to studying the performance that would be achieved when applied both techniques at Point to Point Wireless links.We proposed experiment process and design to measures the performance of this study, several parameters are uses such as delay, jitter, data loss rate and throughput applied on TCP/UDP protocols. We test the performance of both technique with different Packet Sizes and Directional Traffic Flows in Lab Environment. The results showed that Channel Bonding has significant throughput improvement when applied at Point to Point connection used wireless 802.11n. This due to the capability of the Channel Bonding to optimize the available bandwidth of wireless 802.11n, by wider the bandwidth spectrum. However, a different result is obtained for the Interface Bonding that far from expectation, where the throughput is least than single link. This is caused by Media Independent Interface (MII), and Scheduling Algorithm are unable to work properly at wireless 802.11n that use Point to Point connection.
Deteksi Api dengan MultiColorFeatures, Background Subtraction dan Morphology Shidik, Guruh Fajar; Adnan, Fajrian Nur; Pramunendar, Ricardus Anggi; Supriyanto, Catur; Andono, Pulung Nurtantio
Semantik Vol 3, No 1 (2013): Semantik 2013
Publisher : Semantik

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Abstract

Pentingnya  deteksi  api secara dini dapat membantu memberikan peringatan  serta  menghindari bencana yang menyebabkan kerugian ekonomi dan kehilangan nyawa manusia.  Teknik deteksi api dengan sensor konvensional  masih  memiliki keterbatasan, yakni  memerlukan waktu yang cukup lama dalam mendeteksi api pada ruangan yang besar serta tidak dapat bekerja di ruangan terbuka. Penelitian ini mengusulkan metode deteksi  api secara visual yang dapat digunakan pada  camera surveillance dengan  menggunakankombinasi  Multicolorfeatures  sepertiRGB,  HSV,YCbCr  dan  Background Subtraction  serta morphologyuntuk pendeteksian  pergerakan  api.  Evaluasi penelitian  dilakukan dengan menghitung tingkat error deteksi  area api.
ENHANCEMENT OF 3D SURFACE RECONSTRUCTION OF UNDERWATER CORAL REEF BASE ON SIFT IMAGE MATCHING USING CONTRAST LIMITED ADAPTIVE HISTOGRAM EQUALIZATION AND OUTLIER REMOVAL Andono, Pulung Nurtantio; Pramunendar, Ricardus Anggi; Supriyanto, Catur; Shidik, Guruh Fajar; Purnama, I Ketut Eddy; Hariadi, Mochamad
Kursor Vol 7, No 1 (2013)
Publisher : University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/kursor.v7i1.1080

Abstract

ENHANCEMENT OF 3D SURFACE RECONSTRUCTION OF UNDERWATER CORAL REEF BASE ON SIFT IMAGE MATCHING USING CONTRAST LIMITED ADAPTIVE HISTOGRAM EQUALIZATION AND OUTLIER REMOVAL aPulung Nurtantio Andono, bRicardus Anggi Pramunendar, cCatur Supriyanto, dGuruh Fajar Shidik,e I Ketut Eddy Purnama, fMochamad Hariadi a,b,c,dFaculty of Computer Science, Dian Nuswantoro University Jalan Imam Bonjol, No. 207, Semarang 50131, Indonesia e,fFaculty of Industrial Technology, Dept. of Electrical Engineering, ITS, Surabaya, Indonesia Email: a pulung@research.dinus.ac.id Abstrak Penelitian ini menggambarkan peningkatan kualitas rekonstruksi 3D permukaan terumbu karang bawah laut menggunakan sistem kamera stereo. Algoritma Contrast Limited Adaptive Histogram image Equalization (CLAHE) diusulkan untuk meningkatkan kualitas citra bawah laut tersebut, karena menurunnya kualitas citra bawah laut dapat disebabkan oleh penyerapan dan hamburan sinar matahari. Dalam mengembangkan rekonstruksi 3D permukaan bawah laut, pasangan citra stereo diekstrak secara manual dari rekaman video yang diperoleh, yang kemudian dilakukan proses pencocokan citra stereo menggunakan algoritma SIFT. Kelebihan algoritma SIFT tersebut adalah tahan terhadap perubahan skala, transformasi, dan rotasi dari sepasang citra tersebut. Banyaknya matching point antar 2 citra stereo dijadikan ukuran untuk mengetahui kinerja CLAHE terhadap algoritma SIFT. Hasil penelitian menunjukan bahwa penggunaan CLAHE dan outlier removal mampu meningkatkan jumlah matching point sebesar 56%. Keberhasilan CLAHE tersebut perlu diujikan ke beberapa algoritma matching point yang lain. Perbandingan beberapa algoritma matching point yang menerapkan CLAHE dapat membuktikan bahwa CLAHE sangat cocok dalam meningkatkan kinerja algoritma matching point dan rekonstruksi permukaan 3D citra bawah laut. Kata kunci: Rekonstruksi 3D, Citra Bawah Laut, SIFT, CLAHE. Abstract This research describes an enhancement of 3D Reconstruction coral reef images using stereo camera system. Contrast Limited Adaptive Histogram image Equalization (CLAHE) algorithm was proposed to enhance the image quality in preprocessing area, since the quality of underwater images degrades by the absorption and scattering of light. To develop a 3D-representation of the seafloor, image-pairs were first extracted from the video footage manually, then corresponding points are automatically extracted from the stereo-pairs by SIFT matching algorithm, which is invariant to scale, translation, and rotation. Number of matching points is used to evaluate the performance of SIFT with and without CLAHE. As a result, the promising techniques provides better 3D reconstruction details of coral reef imagesin total, the combination of CLAHE and outlier removal performs the enhancement for 56%. For further, CLAHE need to be performed to other image matching techniques. The comparison of different image matching techniques with and without CLAHE can prove that CLAHE is appropriate as image enhancement method for image matching and 3D surface reconstruction. Key words: 3D Reconstruction, Underwater Image, SIFT, CLAHE.
Performance Evaluation of Bonding Techniques at Wireless 802.11n Shidik, Guruh Fajar; Noh, Zul Azri bin Muhamad
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 11, No 1: March 2013
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (471.881 KB) | DOI: 10.12928/telkomnika.v11i1.903

Abstract

Demands for high throughput bandwidth, encourage Point to Point wireless to serve more bandwidth for many kind application such as real-time multimedia services. We conduct research with testbed experimental at Point to Point topology use wireless 802.11n in LAB environment. The aim is to studying the performance that would be achieved by Interface Bonding and Channel Bonding techniques. We proposed experiment process and design to evaluate the performance of those techniques. Several parameters such as delay, jitter, data loss rate and throughput applied on TCP/UDP protocols with different Packet Sizes and Directional Traffic Flows. The results experiment showed that Channel Bonding has significant throughput improvement. However, the Interface Bonding results are far from expectation, we found that the performance is least than single normal link. As our finding we analyze it caused by Media Independent Interface (MII), and Scheduling Algorithm unable to work properly at wireless 802.11n using Point to Point connection.
ENHANCEMENT OF 3D SURFACE RECONSTRUCTION OF UNDERWATER CORAL REEF BASE ON SIFT IMAGE MATCHING USING CONTRAST LIMITED ADAPTIVE HISTOGRAM EQUALIZATION AND OUTLIER REMOVAL Andono, Pulung Nurtantio; Pramunendar, Ricardus Anggi; Supriyanto, Catur; Shidik, Guruh Fajar; Purnama, I Ketut Eddy; Hariadi, Mochamad
Kursor Vol 7, No 1 (2013)
Publisher : University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/kursor.v7i1.1072

Abstract

ENHANCEMENT OF 3D SURFACE RECONSTRUCTION OF UNDERWATER CORAL REEF BASE ON SIFT IMAGE MATCHING USING CONTRAST LIMITED ADAPTIVE HISTOGRAM EQUALIZATION AND OUTLIER REMOVAL aPulung Nurtantio Andono, bRicardus Anggi Pramunendar, cCatur Supriyanto, dGuruh Fajar Shidik,e I Ketut Eddy Purnama, fMochamad Hariadi a,b,c,dFaculty of Computer Science, Dian Nuswantoro University Jalan Imam Bonjol, No. 207, Semarang 50131, Indonesia e,fFaculty of Industrial Technology, Dept. of Electrical Engineering, ITS, Surabaya, Indonesia Email: a pulung@research.dinus.ac.id Abstrak Penelitian ini menggambarkan peningkatan kualitas rekonstruksi 3D permukaan terumbu karang bawah laut menggunakan sistem kamera stereo. Algoritma Contrast Limited Adaptive Histogram image Equalization (CLAHE) diusulkan untuk meningkatkan kualitas citra bawah laut tersebut, karena menurunnya kualitas citra bawah laut dapat disebabkan oleh penyerapan dan hamburan sinar matahari. Dalam mengembangkan rekonstruksi 3D permukaan bawah laut, pasangan citra stereo diekstrak secara manual dari rekaman video yang diperoleh, yang kemudian dilakukan proses pencocokan citra stereo menggunakan algoritma SIFT. Kelebihan algoritma SIFT tersebut adalah tahan terhadap perubahan skala, transformasi, dan rotasi dari sepasang citra tersebut. Banyaknya matching point antar 2 citra stereo dijadikan ukuran untuk mengetahui kinerja CLAHE terhadap algoritma SIFT. Hasil penelitian menunjukan bahwa penggunaan CLAHE dan outlier removal mampu meningkatkan jumlah matching point sebesar 56%. Keberhasilan CLAHE tersebut perlu diujikan ke beberapa algoritma matching point yang lain. Perbandingan beberapa algoritma matching point yang menerapkan CLAHE dapat membuktikan bahwa CLAHE sangat cocok dalam meningkatkan kinerja algoritma matching point dan rekonstruksi permukaan 3D citra bawah laut. Kata kunci: Rekonstruksi 3D, Citra Bawah Laut, SIFT, CLAHE. Abstract This research describes an enhancement of 3D Reconstruction coral reef images using stereo camera system. Contrast Limited Adaptive Histogram image Equalization (CLAHE) algorithm was proposed to enhance the image quality in preprocessing area, since the quality of underwater images degrades by the absorption and scattering of light. To develop a 3D-representation of the seafloor, image-pairs were first extracted from the video footage manually, then corresponding points are automatically extracted from the stereo-pairs by SIFT matching algorithm, which is invariant to scale, translation, and rotation. Number of matching points is used to evaluate the performance of SIFT with and without CLAHE. As a result, the promising techniques provides better 3D reconstruction details of coral reef imagesin total, the combination of CLAHE and outlier removal performs the enhancement for 56%. For further, CLAHE need to be performed to other image matching techniques. The comparison of different image matching techniques with and without CLAHE can prove that CLAHE is appropriate as image enhancement method for image matching and 3D surface reconstruction. Key words: 3D Reconstruction, Underwater Image, SIFT, CLAHE
ENHANCEMENT OF 3D SURFACE RECONSTRUCTION OF UNDERWATER CORAL REEF BASE ON SIFT IMAGE MATCHING USING CONTRAST LIMITED ADAPTIVE HISTOGRAM EQUALIZATION AND OUTLIER REMOVAL Andono, Pulung Nurtantio; Pramunendar, Ricardus Anggi; Supriyanto, Catur; Shidik, Guruh Fajar; Purnama, I Ketut Eddy; Hariadi, Mochamad
Kursor Vol 7, No 1 (2013)
Publisher : University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/kursor.v7i1.1074

Abstract

ENHANCEMENT OF 3D SURFACE RECONSTRUCTION OF UNDERWATER CORAL REEF BASE ON SIFT IMAGE MATCHING USING CONTRAST LIMITED ADAPTIVE HISTOGRAM EQUALIZATION AND OUTLIER REMOVAL aPulung Nurtantio Andono, bRicardus Anggi Pramunendar, cCatur Supriyanto, dGuruh Fajar Shidik,e I Ketut Eddy Purnama, fMochamad Hariadi a,b,c,dFaculty of Computer Science, Dian Nuswantoro University Jalan Imam Bonjol, No. 207, Semarang 50131, Indonesia e,fFaculty of Industrial Technology, Dept. of Electrical Engineering, ITS, Surabaya, Indonesia Email: a pulung@research.dinus.ac.id Abstrak Penelitian ini menggambarkan peningkatan kualitas rekonstruksi 3D permukaan terumbu karang bawah laut menggunakan sistem kamera stereo. Algoritma Contrast Limited Adaptive Histogram image Equalization (CLAHE) diusulkan untuk meningkatkan kualitas citra bawah laut tersebut, karena menurunnya kualitas citra bawah laut dapat disebabkan oleh penyerapan dan hamburan sinar matahari. Dalam mengembangkan rekonstruksi 3D permukaan bawah laut, pasangan citra stereo diekstrak secara manual dari rekaman video yang diperoleh, yang kemudian dilakukan proses pencocokan citra stereo menggunakan algoritma SIFT. Kelebihan algoritma SIFT tersebut adalah tahan terhadap perubahan skala, transformasi, dan rotasi dari sepasang citra tersebut. Banyaknya matching point antar 2 citra stereo dijadikan ukuran untuk mengetahui kinerja CLAHE terhadap algoritma SIFT. Hasil penelitian menunjukan bahwa penggunaan CLAHE dan outlier removal mampu meningkatkan jumlah matching point sebesar 56%. Keberhasilan CLAHE tersebut perlu diujikan ke beberapa algoritma matching point yang lain. Perbandingan beberapa algoritma matching point yang menerapkan CLAHE dapat membuktikan bahwa CLAHE sangat cocok dalam meningkatkan kinerja algoritma matching point dan rekonstruksi permukaan 3D citra bawah laut. Kata kunci: Rekonstruksi 3D, Citra Bawah Laut, SIFT, CLAHE. Abstract This research describes an enhancement of 3D Reconstruction coral reef images using stereo camera system. Contrast Limited Adaptive Histogram image Equalization (CLAHE) algorithm was proposed to enhance the image quality in preprocessing area, since the quality of underwater images degrades by the absorption and scattering of light. To develop a 3D-representation of the seafloor, image-pairs were first extracted from the video footage manually, then corresponding points are automatically extracted from the stereo-pairs by SIFT matching algorithm, which is invariant to scale, translation, and rotation. Number of matching points is used to evaluate the performance of SIFT with and without CLAHE. As a result, the promising techniques provides better 3D reconstruction details of coral reef imagesin total, the combination of CLAHE and outlier removal performs the enhancement for 56%. For further, CLAHE need to be performed to other image matching techniques. The comparison of different image matching techniques with and without CLAHE can prove that CLAHE is appropriate as image enhancement method for image matching and 3D surface reconstruction. Key words: 3D Reconstruction, Underwater Image, SIFT, CLAHE.
Host Overloading Detection pada Dynamic VM Consolidation Menggunakan Fuzzy Mamdani Umam, Chaerul; Shidik, Guruh Fajar
Creative Information Technology Journal Vol 4, No 2 (2017): Februari - April
Publisher : UNIVERSITAS AMIKOM YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.6 KB) | DOI: 10.24076/citec.2017v4i2.101

Abstract

Perkembangan Cloud Computing telah mengakibatkan pembangunan data center skala besar di seluruh dunia yang berisi ribuan node. Data Center Cloud mengkonsumsi energi listrik yang besar yang tentunya mengakibatkan biaya operasi yang tinggi. Konsumsi energi di Data Center akan terus tumbuh pesat kecuali dengan mengembangkan dan menerapkan manajemen resource yang hemat energi. Dynamic VM consolidation bisa menjadi strategi efektif untuk mengatasi masalah pemborosan energi pada data center cloud. Strategi ini dapat diuraikan ke dalam empat tugas pengambilan keputusan, yaitu Host overloading detection (memutuskan kapan host harus dianggap sebagai kelebihan beban), Host underloading detection (memutuskan kapan host harus dianggap underloaded / kekurangan beban), VM selection (memutuskan VMs mana yang harus pindah dari host yang kelebihan beban), dan VM placement (memutuskan tentang host mana yang harus dipilih untuk menerima migrasi VM). Penelitian ini mengusulkan metode fuzzy logic dalam proses host overloading detection. Dataset untuk menguji metode menggunakan data workload dari PlanetLab. Hasil dari pengujian metode yang diusulkan menunjukkan hasil yang menjanjikan dengan peningkatan efisiensi energi 2,24%.