I recently did a mapping mission of a field using the Autel Evo II Dual 640T V3, which has both an RGB and thermal camera. The thermal camera has a smaller footprint, so flights were conducted so that there would be 80% front and side overlap for the thermal imagery. Conditions were normal at the site at the time of flying.
When producing a reflectance map for the thermal imagery in Pix4Dmapper, only 37% of the thermal images were shown as calibrated. Additionally, despite the RGB and thermal images being taken at the exact same time, the flight path for the thermal camera appears crooked in P4Dmapper. The RGB orthomosaic was generated perfectly.
Below are the quality reports for both projects. Does anyone know how to fix the issue with the thermal imagery?
The GCPs were evidently messing up the reflectance map. I attempted to re-process without the GCPs and using a 1/2 image scale and changing the point density from high to optimal. Here is the new quality report:
09-29-23 Midville thermal_report.pdf (1.4 MB)
The reflectance map was much improved, however there are some very splotchy sections. An example of this is in the image below comparing the top 2 rows with the bottom 2. Is there a way to fix this?