Setelah berkutat selama hampir 2 tahun,, ini lah tesisku:

ABSTRAK

Analisis deformasi dilakukan dengan analisis geometrik dan intrepretasi fisik objek terdeformasi. Analisis geometrik merupakan bidang kajian ilmu geodesi yang dilakukan dengan mengkuantifikasi besar deformasi yang terjadi dari penentuan besarnya vektor pergeseran koordinat antar kala. Penelitian ini mencoba suatu metode alternatif yang relatif murah untuk melakukan pengamatan deformasi, yakni menggunakan teknologi Close Range Photogrammetry (CRP) atau Fotogrameteri Rentang Dekat, dengan memanfaatkan kamera digital yang low-cost. Kemampuan kamera digital dalam mendeteksi deformasi objek diuji dalam skala laboratorium, menggunakan lemari besi sebagai kerangka serta monitor komputer sebagai objek terdeformasi. Kamera yang digunakan adalah kamera komersial Nikon Coolpix 2200 dengan jumlah piksel sebanyak 2 mega. Dari berbagai uji kalibrasi, kamera ini bersifat tidak stabil, terutama pada komponen panjang fokus utama. Untuk mengantisipasi ketidakstabilan parameter internal kamera, harus selalu dilakukan kalibrasi dengan self-calibration. Perhitungan koordinat foto dilakukan dengan metode bundle adjustment, yang menghitung secara simultan parameter kamera, lokasi kamera, dan koordinat objek di foto. Hasil menunjukkan bahwa metode CRP berpotensi untuk digunakan dalam mendeteksi pergerakan. Kamera Nikon Coolpix 2200 dapat mendeteksi perubahan di atas 3 mm, dengan kata lain pada skala 1/2000 dari jarak objek ke kamera.

Kata kunci: Close Range Photogrammetry, Self Calibration, Perataan, Deformasi

ABSTRACT

Deformation analysis is done by analyzing the geometric and the physical state of the deformed object. Analysis of the geometric state is a geodetic work which is done by quantifying the amount of the deformation by determining the displacement vector of certain coordinate as a function of time. This research elaborates an alternative method the relatively low-cost for monitoring the deformation by utilizing the technology of close-range photogrametry (CRP) using a low-cost digital camera. The ability of such camera in detecting the magnitude of a deformation was tested on laboratory scale using a steel shelf as the reference frame and a CRT monitor as the deformed object. An auto-focus Nikon Coolpix 2200 digital camera was used for capturing images of the frame and the deformed object. Stability analysis shows the variation of focal length component as the consequences of using an auto-focus camera. This problem of focal length stability is overcome by self-calibration procedure at every epoch of image capturing. Computation of the 3-D coordinates of the frame, objects, camera position and the camera’s internal parameters are solved simultaneously by bundle adjustment computation. Result of the study case shows that this CRP method using a low-cost digital camera can detects up to 3 mm of deformation or on the scale of 1/2000 of camera to object distance.

Keywords: Deformation, Close Range Photogrametry, Bundle Adjustment, Self Calibration.

I took Disaster Management in my Master study. It is soooo interesting for me because it is important thing to do in my country! I wanna give some contribution here,, though a little. It`s only that then I realize how large is this field, it require many work and many integration. So where should I put myself in this huge work?? And that `s it, the Geodetic tools, a new tools with good future: Close Range Photogrammetry.

Here is my thesis pdf file: tesis_crp_rahma

for them who are interested in Close Range Photogrammetry. Hope this can be helpful little bit. It is in Indonesian Language ^_^.