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Phantom 4 Camera Optimization - Quality Report

Thank you for the opportunity to resolve my issues!

UAV: DJI Phantom 4

Mobile App: Pix4D Capture

Desktop App: Pix4D Trial

I have done my first flight starting from a top of a hill and mapped the hill down the slope and everything was perfect. The drone was previously calibrated, had an average of 19 satellites, no warnings whatsoever.

I started to edit the images in order to get the 3D model of the area but the main purpose was to acquire the orthomosaic. 

After the “Initial Processing” the quality report came and in the Quality check section there were two erros: 1. Georeferencing no 3d GCP (which I totally understand, I had none for this project but the other one was 2. the Camera Optimization which states that “98.62% relative difference between initial and optimized internal camera parameters”.

The resulted 3d model is flat, no morphological aspects of the terrain are displayed, just a flat display of the Tie Points.

I have selected the recommended camera for the project, DJI phantom 4, from what I read over the web should be FC330_3.6_4000x3000 (RGB).

Pix4DCapture has no option for altitude type AMSL (above median sea level) or AGL (above ground level). If my P4 flew AGL then my results should be flat, rigt?

Is there a solution to my problem?

Thank you in advance!

Cris

Hi Cristian,

Thank you for your interest in our products.

It would be more convenient for us if you write to Support. Ideally you could attach a screenshot of what is displayed in the rayCloud and also the quality report that you can find here: …\Project_name\1_initial\report\Project_name_report.pdf

Submit a request

Looking forward to hearing from you.

Regards,

Thank you for your feedback!

I have discussed with other users on another thread about this issue and it appears that I had to edit the camera before the initial process and set it on Rolling Shutter instead of the default setting. After I have changed the Camera parameters instead of 90% I get 45% relative difference. This flight was done in the same day of the new firmware for Phantom 4 but I did not upgrade it in the field. Maybe this was the issue. 

Today I have tested another area and with the camera setting tweaks I managed to obtain 9% relative difference without GCP. Huge difference!

I can send to support the reports and print screens if it helps with something. 

KR,