Inspection of 3D Modeling Techniques for Digitization Deepali G. Chaudhary 1 , Ramdas D. Gore 2 , Bharti W. Gawali 3 Department of Computer Science & Information Technology, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, MS. (India) Abstract – In order to prevent heritage and important sites, an inspection was carried out to identify different tools and techniques for 3D modeling. It was observed that a good quality work is done all over the world, related to 3D modeling. Different tools and techniques where adopted by different researchers along which different data acquisition were used. It was studied that different tools are suitable to work with different type of 3D model generation. Keywords – 3D modeling, heritage, important sites, digitization, LiDAR, passive, active, photogrammetry and point cloud. 1. Introduction 3D technologies are becoming popular in management, digitization and conservation of not only historical but for the monument which holds a national importance. A 3D visualization help in planning house, town, city, buildings and many other. The 3D representation presents object in a much effective way as compared to 2D photos. As the time is passing, heritages/important sites such as Natural, cultural or mixed are moving towards degradations due to ecological effect and artificial changes as wars, natural disasters, climate changes and human negligence and one day the places will be vanished [16]. This is leading, an increasing demand all over the world to preserve these important sites. Digitization (3D model) provides a ways of preventing these important sites. 3D modeling and texture mapping uses point cloud (unstructured) and polygonal model (structure) [18] and provide virtual view of sites. UNESCO has listed more than 1073 world heritage/sites. Among which at international level Italy has the highest count of heritage sites. Nepal is also one among them and extremely sensitive to natural disaster [16]. Not only these but other countries like Turkey [2, 38], Greece [28], Italy [31, 36], India [48] and many other countries are also moving towards digitization of heritage sites, in order to prevent them from degradation. Even India has digitized many historical sites, buildings and statues not only for the sake of prevention, but also to provide a realistic virtual view and to attract tourists. Several ways are adopted by a researcher for the development of the 3D model in which keeping track of the changes in the heritage/important sites was one of the major concerns. To create a 3D model of archaeological and culture heritage site powerful tools and techniques are required Many techniques are available which are able to capture and make digital model with Geo-referenced details of sites [1]. Different sectors are benefited by using 3D modeling like education, preservation of ancient places, civil engineers, interior designers marketing, town planning and for many other things. The basic objective of this paper is to showcase the advancement achieved in the field of 3D modeling as well as to represent digitization of accomplished heritage and important monuments through the 3D modeling. 2. Overview 3D Modeling Throughout the last decades, a number of researchers have been addressing the use of Photogrammetry to develop 3D models for creating the virtual reality of cultural heritage sites [7], important places and sculptures. Broadly the methods used for this purpose were distributed into two methods as I. Image Based method also knows as Passive Techniques II. Range based methods known as Active Techniques International Journal of Computer Science and Information Security (IJCSIS), Vol. 16, No. 2, February 2018 8 https://sites.google.com/site/ijcsis/ ISSN 1947-5500