i came across 2 severe Problems with processing my Multispectral Images shot on a Phantom 4 Multispectral with Pix4DFields. (at the Moment i am still on Trial)
First off the Camera and Workflow Settings: (were used over all Photos shown)
Overlap Front and Side: 80%
Photos were taken at equal Time Intervals.
Capture Time was set to 2sec
AGL was 100m.
Weather Conditions were cloudy.
RTK Positioning was performed with the Base Station from DJI.
Rig-Calibrationpoints in Pix4DFields were enabled.
IMU, Gimbal, Compass and Firmware were calibrated Pre-Flight.
Second the disred use of the photos:
The Photos will be used in professional Agriculture. Therefore a AGL of 100m, the equal Time Interval Trigger and a Time Interval of 2 sec was selected to achieve a better Flight Performance per Battery.-Yes i know this comes with less Precision but everything apart from these Flight Options is simply unacceptable to gain a sustainable Rate of ha/hour.
The 2 Problems i am facing right now:
1. - When creating the Orthomosaic i came across very blurry spots in the Photos that were following the lines of Flight created by me. They seem to follow the outer Parts of the Pictures taken.
2. - The Individual Bands didnt overlap enough in the Multispectral Image, making the Pictures seem blurry and shifted. Its becoming very obvious when i create an RGB from the Single Bands.
Similar Results were achieved at the following Heights (50,25), the following Overlaps (90/90, 70/70), and both other Flight Options (Hover and Capture(even at 3,6km/h), Capturing at equal Distance Intervals 1-2sec).
Am I just expecting too much from the system? Why dont the Single Bands overlap precisely enough? What can I do to improve?
I am attaching Photos to compare. When comparing the NIR and RED-EDGE there is visual Shifting/Morphing.
Any Help is welcome.
Thank you very much in advance!!