I’m working on creating an ortho/contour output from imagery I took walking with a GoPro MAX 3.0 camera. When I went through the three processing steps without applying 3D GCPs, the surface came out smooth. When I applied three 3D GCPs after the initial processing, however, it resulted in a jagged surface (see below). Is there a step I’m missing in the processing? Any thoughts would be appreciated.
Here is the quality report for a project where I used my phone (pix4Dcatch) to capture images, and then used GCPs collected by survey to calibrate. I ran into the same issue on this model as the one in the orginal post. Before applying the GCPs, the tie points were showing up normally but after applying the GCPs the tie points snapped to some sort of grid that happens before the mesh in the orginal post is created.
After cross-checking the number of ATPs per pixel, I could see there are some black dots. Black indicates that, on average, 0 ATPs have been extracted at
the pixel location. So the more black dots we have, it indicates there is a high chance the issue could be related to overlap.
Using a GoPro is quite tricky and can be very challenging. If anyone else or GoPro users have thoughts or experience with this sort of workflow feel free to provide your additional advice or experiences.
I also found this thread that increasing the overlap sometimes could greatly help with the issue.
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