Optimisation of Image Interpretability and Geometric Accuracy of Airborne Videography
Keywords:
videography, image refinement, accuracy, videografi, pemulihan dan ketelitian geometrik citra videoAbstract
Airborne video images which have several advantages over satellite images and aerial photographs were captured over some selected areas. After they were refined to increase their interpretability, the images were assessed in accordance with the existing map accuracy specifications. Four algorithms of image refinement were tested. These include projective, row duplication, row interpolation and statistical correlation function. Numerous test points were selected on the image and their coordinates were compared to their ground positions. The results suggest that a solid-state video camera can provide images that are sufficiently accurate for medium-scale topographic mapping.
Ketelitian Geometrik dan Optimalisasi Tingkat Ketajaman Citra Video
Citra video, yang mempunyai beberapa keuntungan dibandingkan dengan citra satelit dan foto udara, diperoleh dari hasil penerbangan di atas suatu daerah. Setelah citra tersebut direstorasi untuk meningkatkan tingkat ketajamannya, dilakukan proses fotogrametri untuk mengevaluasi tingkat ketelitian geometriknya. Restorasi citra dilakukan secara digital dengan empat macam teknik, yaitu projektif, interpolasi baris, duplikasi baris, dan kolerasi statistic. Evaluasi keteletian geometrik dilakukan dengan membandingkan koordinat sejumlah titik yang diamati pada citra video dengan posisi seharusnya di lapangan. Hasil pengujian mengindikasikan bahwa kamera video dapat digunakan pada pemotretan udara bagi keperluan pemetaan topografi skala menengah.
References
Bakosurtanal (1992) Spesifikasi Peta Rupabumi Indonesia Skala 1:25,000, National Map Specification, Cibinong, Indonesia.
Bernstein, R., Lotspiech, J.B., Myers, J.H., Kolsky, H.G., and Lee, R. (1984) Analysis and Processing of LANDSAT-4 Sensor Data Using Advanced Image Processing Techniques and Technologies, Institute of Electrical and Electronic Engineers Transactions on Geoscience and Remote Sensing, Vol. GE-22, No. 3, pp. 192-221.
Ding, X. (1996) Personal Communication, Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnia University, Hung Hom, Kowloon, Hong Kong.
Department of Land and Administration (DOLA) (1994) Topographic Data Acquisition, Standard Specification Circular, Department of Land Administration, Perth, Australia.
Everitt, J.H., Escobar, D.E., Gerbermann, A.H. and Alaniz, M.A. (1988) Detecting Saline Soils with Video Imagery, Photogrammetric Engineering and Remote Sensing, Vol. 54, No.9, pp. 1283-1287.
Fusco, L. and Trevese, D. (1985) On the Reconstruction of Lost Data in Images of More than One Band, International Journal of Remote Sensing, Vol. 6, No.9, pp. 1535-1544.
Jensen, J.R. (1986) Introductory Digital Image Processing: A Remote Sensing Prespective, Prentice Hall, New Jersey, USA, 379 pp.
Mather, P.M. (1987) Computer Processing of Remotely-sensed Images: An Introduction, John Wiley and Sons, Suffolk, UK, 352 pp.
Pickup, G., Chewings, V.H. and Pearch, G. (1995) Procedures for Correcting High Resolution Airborne Video Imagery, International Journal of Remote Sensing, Vol. 57, No. 12, pp. 1589-1596.
Repic, R.L., Lee, J.K., and Mausel, P.W. (1991) An Analysis of Selected Water Parameters in Surface Coal Mines Using Multispectral Videography, Photogrammetric Engineering and Remote Sensing, Vol. 57, No. 12, pp. 1589-1596.
Richardson, A.J., Menges, R.M. and Nixon, P.R. (1985) Distinguishing Weed from Crop Plants Using Video Remote Sensing, Photogrammetric Engineering and Remote sensing, Vol. 51, No. 11, pp. 1785-1790.
Steiner, D.R. (1992) The Integration of Digital Orthophotographs with GIS in a Microcomputer Environment, ITC Journal, Vol. 1992-1, pp. 65-72.
Sumarto, I (1997) An Investigation into the Applicability of Airborne Videography for Topographie Mapping, Unpublished Ph.D Thesis, Curtin University of Technology, Perth, Western Australia, 250 pp.
Thapa, K/ and Bossler, J. (1992) Accuracy of Spatial Data used in a Geographic Information System, Photogrammetric Engineering and Remote Sensing, Vol. 58, No. 6, pp. 835-841.
Torlegard, K. (1992) Sensors for Photogrammetric Mapping: Review and Prospects, International Society for Photogrammetry and Remote Sensing Journal of Photogrammetry and Remote Sensing, Vol. 47, pp. 541-262.
Vlcek, J. (1988) Nature of Video Images, Proceedings of American Society for Photogrammetry and Remote Sensing First Workshop on Videography, Indiana, USA, October, pp. 512.
Warner, W.S. (1989) A Complete Small-format Aerial Photography System for GIS Data Entry, ITC Journal, Vol. 1989-2, pp. 121-129.
Warner, W.S. (1990) Accuracy and Small-format Surveys: The Influence of Scale and Object Definition on Photo Measurements, ITC-Journal, No. 1990-1, pp. 24-27.
Wright, R. (1993) Airbone Videography: Principles and Practice, Photogrammetric Record, Vol. 14, No. 81, pp. 447-457.
