Ditemukan 15 dokumen yang sesuai dengan query
Tukul Rameyo Adi
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Metoda klasifikasi Jaringan Syaraf Tiruan (JST) telah banyak diterapkan dalam bidang penginderaan jauh. Dalam penelitian ini dilakukan percobaan klasifikasi awan dengan menerapkan metoda JST Kohonen pada data citra multispektral satelit NOAA AVHRR. JST Kohonen adalah metoda klasifikasi tak terselia yang berbasis pada sistem pembelajaran kompetitif Self-Organizing Maps (SOM). Prosedur percobaan terdiri dari tiga tahap, yakni tahap pembelajaran, tahap pelabelan dan tahap klasifikasi.
Pada mulanya, klasifikasi awan dilakukan menggunakan lima kanal data citra sebagai vektor masukan, yakni ...
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Depok: Fakultas Teknik Universitas Indonesia, 1999
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Yeni Sufiani
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ABSTRAK
Rangkaian pembagi daya optik telah dibuat untuk suatu sub sistem komunikasi optik. Untuk ini dipilih jenis gelas BK-7 yang dapat diperoleh dengan mudah di Indonesia. Pada proses pembuatannya digunakan metoda natural difusi dan Tl 2 SO4 sebagai sumber ion Ti yang akan didifusikan. Tahap pertama dari pembuatan rangkaian pembagi daya adalah proses pembentukan lapisan pandu gelombang pada permukaan substrat BK-7. Kemudian dilanjutkan dengan proses pembentukan rangkaian pembagi daya optik 1 x 3, menggunakan metoda photolithografi. ...
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1999
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Achmad Harimawan
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ABSTRAK
Telah dilakukan percobaan penerapan tapis pada cuplikan citra skala keabuan 8 bit [0-255] yang terkubur dalam bising elektronik akibat dari perekaman pada illumiasi rendah dengan metoda logaritmik, metoda homomorfik dan difinisi sendiri metoda konvolusi dikrit dengan beberapa penopeng [masking]. Disamping itu dilakukan juga pada cuplikan citra yang terkubur dalam bising periodik dan bising acak dengan tapis metoda pemotongan puncak spektral bising, serta tapis median.
Dari percobaan tersebut telah diperoleh beberpa metoda yang tepat dan dapat direkomendasikan ...
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1998
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Harsoyono
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ABSTRACT
In particular we concentrate on mayor current implementations of optical fiber communications system which employ some form of intensity modulation (1M) of optical source, together with simple direct detection (DD) of the modulated optical signal at receiver- Good receiver where x is 0,3 (factor x ranges between 0 and 1.0 depending on the photo diode material }and SNR excess of 70 dB, is for 25 km transmission distance.
The deployment optical amplifiers, particularly on long IM/DD ...
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1995
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Bernadus Hariadi Chrismastoro
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Characterizations have been performed on single stage Transversely Excited Nitrogen Laser of Blumlein type. Optical cavity arrangement is varied prior to measurement which shows no significant increase in energy on both configurations of inserting a mirror only and a pair of mirror and a quartz parallel plate. Frequency repetitions respond reveals a small drop in energy at higher frequency i.e. 10 Hz by a factor of 20%. N2 flow rate consideration behaves on the similar ...
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Depok: Program Pascasarjana Universitas Indonesia, 1994
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Hafni Septiana Nur Endah
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Segmentation is basically a process of pixel classification, the picture is segmented into subsets by assigning the individual pixel to classes. In this case when segmentation by thresholding it have to do classifying the pixels into " dark" and "light" classes, in an attempt to distinguish dark object from their light background.
Similarly in edge detection pixels is classified into "edge" and "not edge" by thresholding the response of some difference operator that has high values ...
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Depok: Fakultas Teknik Universitas Indonesia, 1994
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Agus Santoso Tamsir
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ABSTRACT
Recently, the Indonesian researchers have anticipated the research on photonic devices especially on semiconductor laser. According to the anticipation above, the scope of this research is on photonic devices particularly on design and performance fabrication of 1.55 um GaInAsPfInP semiconductor laser using intrinsic single-mode layers.
The semiconductor laser was designed using intrinsic single-mode layers that consist of 4 (four) layers i.e., 2 (two) waveguiding layers with 1,15 p.m, AMB (Anti Melt Back) layer with 1.3 pm, ...
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Depok: Fakultas Teknik Universitas Indonesia, 1996
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Tampubolon, Berlian
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A fabrication and application of planar micro-lens is presented in this thesis. With the goal of alignment free of the optical component, a branching circuit have been considered.
Even now, the alignment of optical components is still a problem. The advantages of the branching circuit consists of planar micro-lens is easy to connect with other optical component. Since integration of optical subsystems which allows the easy alignment and high efficiency is strongly required for future networks. ...
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Depok: Universitas Indonesia, 1996
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Agus Rubiyanto
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ABSTRACT
A non-mechanical method of measuring temporally coherent light, which may be dominated by incoherent background radiation, has been developed. The measurement method is based on the modulated signal produced by the temporally coherent radiation through a LiTaO3 crystal.
In the study, the coherent and incoherent lights are combined. To detect coherent light in the presence of incoherent radiation, the crystal is modulated with 2 KHz to 25 KHz sinusoidal signals. To obtain good modulation, the ...
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1993
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Tatang Hidayat
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ABSTRACT
The molecular weight of Polymer material can be determined using optical system by measuring the intensity of scattered light at low angle light scattering and its the incident beam, based on Rayleigh scattering have developed by Debye has known as Static Light Scattering.
To carry out this measurement, an optical system was constructed using a HeNe laser light with a certain intensity, and the light passed through a polymer solution and its scattered light ...
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1992
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