3d Model Measuring System

With the rapid development of digital technology, we can now obtain easily the image with high resolution capability or the detailed 3D (Three-dimensional) data of the object by the technique of laser scanner or digital photogrammetry. And as we can now make a 3D model with real texture from these data by using the CG (Computer Graphics) technology, new business chance is expanding in the domain of CG and GIS as regard to city planning, architecture, maintenance, cultural assets. However, to do all this, a lot of time and work is required as we have to deal with enormous amount of data. To solve this problem, therefore, we have now developed and added a new function to our PC-based Digital Photogrammetry System which can produce a 3D model from digital camera’s image. This new function can handle all the photo-image data obtained from high altitude (above 1000m) and low altitude (above 100m) aerial as well as the ground photography and can produce a 3D model incorporating simultaneously all these data altogether. Furthermore, in order to simplify the operation, we have succeeded to develop a new photoguiding system to guide the photo-shooting and make simulation on the display in which the object is shown in real time. Here we superimpose on the display the data of plan, the data of the position of the control points on the object as seen from the shooting position of camera or the data of 3D obtained from aerial photograph so that the computer can guide and simulate the shooting position for the best possible result. In this way, even if we change the shooting position, we can always show the CG of such thing as control points at the most desired place on the display. In the following presentation, therefore, we are going to demonstrate how we have confirmed the validity of our system by making 3D measurement and 3D model out of the digital pictures taken by high altitude airplane, low altitude aircraft (e.g. powered paraglider) and the pictures taken on the ground.