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3-D Modeling is a special semi-automatic approach that aids in the documentation of facade structures. The high quality image can be taken from a moving, uncalibrated consumer and yet the image will remain static. Whatever the building or structure is divided into different plains and sub-plains. A bounding object is placed around different areas of the building or object and each of these areas are projected independently. Placing the bounding box is important. It should take into account all the camera parameters and work interactively with them. Depending on the quality of the surface orthographic projections are generated out of the image sequences. The 3-D model thus generated will be estimated according to the shape and silhouette approach of the object. The images thus generated are then imported as background maps which include the top, side and front view. The problems arise when one doesn't get a discernible image because details are lost and the image looks noisy. To overcome this situation, semi automatic systems were introduced and these work fine with a little bit of manual intervention. The result of the image thus generated is accurate and efficient. The paper presents the possibilities of different systems that are used in 3-D modeling and the advantages of using them. The conclusion can be reached that 3D images can be generated for not just solid surfaces, but it is possible to work with translucent surfaces.
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