You may have heard of Photogrammetry. It is a photography technique that allows creating of 3D images from 2D photographs. The process works through using the knowledge of two or more images that will be used to determine the main dimensions and features of the picture. Computer software, programs, and techniques are used to take the image data and transform it into a 3D model of the subject.
The most common applications for this technique are real-time rendering and architectural rendering. The term Photogrammetry was first used in the 1920s by German Professor Kurt Hesse who was interested in mapping different building structures in order to identify the elements and nature of each building. In his studies he was able to use this method of modeling technology to generate millions of images from every building.
Today the field of building structures is well represented through photography, all the images taken in every part of the world. Through this method of modeling, the study of building elements can be traced back to the ancient times. There are many reasons for the popularity of this approach: it has the ability to capture natural lighting conditions and it is relatively easy to use.
Despite the popularity of this technique in recent years, there are several drawbacks of the process. The main drawbacks are the need for accurate measurements and the absence of accuracy of measurement tools. This is due to the fact that the 2D photograph can have different dimensions depending on its angle of view, size, and light source.
Even with the standard 3d software it is not possible to derive accurate 3D models without using the expertise of a computer expert. This is why it is always advisable to hire a professional modeler who can convert these images into the 3D models. It is important to note that in a sense Photogrammetry is an incomplete process because of the need for measurements and accuracy in them.
Another problem associated with this technique is the lack of precision when it comes to producing accurate models. Without the use of the accurate measurements, you can only produce simplified models which may be acceptable as graphics in certain projects but not as good models for architectural rendering. They are also very expensive to create and produce because of the complex procedures involved in this process.
The problems associated with computer models in real time rendering are a lot smaller though and they do not create any negative impact on the quality of the final product. This is because in the case of architecture a fully loaded 3d model has been created. All the required attributes of the architectural element can be calculated in advance and the model can be rendered in a more accurate way.
If you have the money and the time, it may be possible to create a fully loaded 3d model of the architectural elements before you start to render a real time-architectural rendering. However, it is still necessary to have a good foundation before you can start rendering. The framework that you use to make your architectural rendering should be able to be used in the case of photogrammetry.
As you may know, the complexity of the task increases if you want to get accurate models. An important factor for the accuracy of the architectural rendering is the exact positioning of the models. With the help of the numerous images that are available, you can calculate the exact locations of the architectural elements to be rendered.
When rendering these models, it is essential to be able to have a good perspective view. The architectural element’s origin must be clearly visible and you should be able to place the model accurately in the scene. In the case of complex modeling, it is possible to use multiple images for the same model.
It is important to understand that each time you approach a topic related to photogrammetry, you will need to study the nuances of the subject for it to be possible to reach a solution to your architecture project. There are many approaches that you can use when trying to model the architectural elements. For example, each architectural element can be modeled by combining three or more images.
One of the approaches that are usually applied for this type of modeling is called architecture rendering. Which is a technique that tries to represent the architecture by converting several images into a single model.