I Have some questions. I’m working since 2018 in the creation of 3D models and 2D of electrical substations of my company (I read a lot of articles and proved with diferentes techincs in take the photograps and processing options in a great amount of projects).
In order to obtain the orthomosaic I usually take nadir photograps with a simple grid and to process the template “3D Maps”.
Furthermore in order to obtain the dense point cloud I take just photograps at 45 using a double grid and to process the template “3D model”.
For my surpsise in the last processings (in diferents electrical power stations projects) I am having better details in the the “dense point cloud” using the simple grid and nadir photographs than the projects that I use double grid and 45° photograps.
Obviously using nadir photograps there are some details in that the camera “can´t see”.
I attach 6 photograps of the same place of 3 projects, that the photographs were taken in the same conditions light (cloudy day):
-simplegrid and 90, using 3d maps template (great sharpness, great color and recognizes the wire that is very important)
-Double grid and 45 using 3d model template (more noise than 2D and didn´t tecognize the wire, bad sharpness)
-Project merggin two projects (a lot of great of noise and just put very few wires from the first project, horrible sharpness)
I have this questions:
-If I made a double grid at 45 to obtain the the densified point cloud, what parameters are better? the 3d model or the 3d maps??. Because in the step 1 in the tab “matching” the 3maps has selected “Aerial Grid or corridor” (in this casi it is like this), and for 3d model it has selected “Free flight or terrestrial”. My case is a double grid, but I need the 3D model.
In the step 2 (according to the recomendations) I disabled the multiscale option. And what is better in the matching windows size?, I believe that in this case is better 9x9.
-Looking the images that I attach. Why the merge project have that much of noise and the quality is so worse than the others?
-Why if in the 2D project recognize a great amount of wires, and when I create a merge project (using the 2D project as input) the program just put a few amount of wire and on the other hand put a lot of noise.
-Have someone some tip to this kind of project?
Thanks for the help,