3D Documentation and Preservation of Farhat Baksh Kothi and Chhatar Manzil, Lucknow, Uttar Pradesh using Terrestrial Laser Scanning

3D terrestrial laser scanning has become an increasingly popular technique for the digital preservation of historical monuments due to its completeness, accuracy, and speed compared to traditional methods such as hand measurement and tachometry. This study demonstrates the capability of terrestrial laser scanning technology for documenting historical monument facade data in a 3D environment, followed by the generation of a 3D model for visualization using registered colourized point clouds. The Lieca P40 system was used to record the surface data characteristics of the monument, while a Lieca digital camera was integrated with the Lieca P40 system to capture colour information of the geometric object. The resulting end product allows for the generation of a 3D coloured visualization model of the historical monument with an automatic colourization process. The attachment of RGB value from the detailed high-resolution digital images onto the 3D point clouds data was completed using Lieca cyclone software, which allows for the visualization of the 3D model in a much more photorealistic way. The case study presented in this paper focuses on Kothi Farhat Baksh & Chhatar Manzil, two important heritage monuments in Lucknow, Uttar Pradesh, India.