In all attempts, images were being geolocated using Pixhawk’s BIN (dataflash log) converted to .LOG. see as shown below.
At first, I tried to have all the images geotagged using Pixhawh geotagger, but that did not work because of mismatching number of photos versus messages; and the time offset with pixhawk I don’t really like it as it seems unreliable; many times I have used in the past I saw it misbehave. If that worked, i would simply load them up all in one project and process them as one.
Therefore my best option for geotagging was to use Pix4Dmapper and the .LOG file; it does a very good job even if you have mismatch between images and messages. The only problem is that you can not load up all the photos in one project and use the log files one by one to progressively geotag the images. As a result I was forced to create each flight a separate project and geotag it them run rapid process. All the rapid processed data then were merged into one big project, but really with intentions to bring all the geotagged images into one project rather than using the rapid processing results. That is why as soon as it tried to create quality report after merging, I just cancel it and run the whole step 1 afresh.
Surely, images can be processed without geotagging, but it takes nearly 3 times longer and many images are left uncalibrated especially those in areas with full vegetation cover.
It would have been nice to do the calibration individually as you say because like for us our missions are usually long because our birds can stay afloat for +2hours and can be well over 1500 photos per mission. Tribute to our developer ARACE Aerial Systems who build our birds as seen below.
Unfortunately though, calibrating individual projects unless I go through the MTPs option does not seem to be helpful, I would rather go through the workflow I just invented which has shown excellent results, Ihope you agree me based on the quality report I posted. As I said I am going to test this approach on another two projects which I had exactly same problem and was never re-solved but I ended up using a different software to process. But I have been a Pix4Dmapper since back in days when I first used customized into " Post Flight 3DTerra".
Do you think there could be better algorithm to replace the use of MTPs soon? I would like to see that one day.