Development of Photogrammetry

So far, photogrammetry has a history of about 170 years. Generally speaking, photogrammetry has gone through three development stages: analog method, analytical method and digitalization. Table 1-9 lists the main characteristics of three development stages of photogrammetry.

Table 1-9 characteristics of three development stages of photogrammetry

If the development from analog photogrammetry to analytical photogrammetry is a technological progress, then the development from analytical photogrammetry to digital photogrammetry is a technological revolution. The biggest difference between digital photogrammetry and analog and analytical photogrammetry is that the original information it processes can be not only digital images obtained by scanning aerial photographs, but also digital images directly obtained by digital sensors, and the products are in digital form. More importantly, it finally replaces the stereoscopic observation of human eyes with computer vision, so the instruments it uses are only ordinary computers and their corresponding external devices, so it is a computer vision method.