Photometry has a long history since its inception in the mid-19th century. It started with analog photogrammetry and has now entered the digital photogrammetry stage.
Contemporary Digital photogrammetry is the product of traditional photogrammetry combined with computer vision . Its research focuses on automatically extracting the spatial information of the photographed object from digital images.
photogrammetry is characterized by measuring and interpreting the image, without contacting the object itself, so it is less restricted by the surrounding environment and conditions. The object may be solid, liquid or gas; it may be static or dynamic; it may be distant, huge or extremely close, tiny. Therefore, photogrammetry has a wide range of applications.
In terrain exploration, photogrammetry has many obvious advantages compared with traditional measurement techniques. It can collect terrain data faster, more accurately and more conveniently. Especially when facing relatively complex terrain environments, terrain data that is difficult to obtain by other measurement methods can be easily obtained and displayed through 3D models by using drones.
In addition to traditional topographic surveying, photogrammetry application scenarios are becoming more and more extensive. Photogrammetry can be seen even in 3D printing .
The meterer only collects image data of a certain degree of overlap around the subject through different angles and constant light, and then uses the schema real-view three-dimensional view to convert these photos, making it easy to obtain one-to-one restored 3D models and process them for 3D printing.
Although there are many scanning technologies that can be applied to 3D printing, photogrammetry is one of the most convenient and efficient technical means. Anyone can do it with a mobile phone. After you take enough images and upload their image data to the three-dimensional real-view scene, you can quickly obtain your three-dimensional model!
