How to determine the latitude and longitude coordinates of each pixel in photogrammetry?

First of all, we need to do a field photo comparison survey. We can use GPS to measure the coordinates of some model points in photos statically or dynamically (we can arrange flat points and elevation points according to the regional network). Then you need to do the relative orientation of photos in the field, and then participate in indoor aerial triangulation (three-space encryption). Through the photo position calculated on the spot, the coordinates of each pixel point under the three-dimensional model can be measured with the help of surveying and mapping software. Generally rectangular coordinates. If you need latitude and longitude, you generally need to convert.