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poor quality orthomosaic quality

I have produced an orthomosaic in Pix4D mapper from a DJI P4RTK flight over a crop and would like to create a TGI index map from it but the ortho has many artefacts. I also ran the images through an online photogrammetry portal and the ortho is perfect. Can you tell me how to change the parameters in Pix4d Mapper to get the best possible orthomosaic quality.

Cheers,

Hello,

could you please upload the quality report of your project that can be found here (.pdf format): …\project_name\1_initial\report\project_name_report.pdf
and some screenshots that highlight the issue?

Hi Christina,

Thank you for your prompt reply to my query. Attached is the Pix4D Mapper report.

image001.png

Bundy Research Station Legume Fallow Trial P4RTK 17-02-2021_report.pdf (2.03 MB)

(Attachment Bundy PMN Trial.docx is missing)

(Attachment DAF Bundy PMN Trial Index Calculator Values (version 1).xlsb.xlsx is missing)

Hi Christina,

Some of the attachments to my last email were not accepted by your system so I have uploaded them to my OneDrive.

image004.pnghttps://itpqld-my.sharepoint.com/:f:/r/personal/marcus_bulstrode_daf_qld_gov_au/Documents/Pix4D%20Mapper%20Information?csf=1&web=1&e=WaNNfM

Cheers,

image001.png

Hello Marcus,
The artifacts can be minimized with good dataset. You could generally increase your flight height and the image overlap to minimize the effect. For your quality report, I don’t see any issue while processing. I would suggest you to try the below calibration methods and see if that is helpful.

  1. Calibration Method: Alternative (Optimized for aerial nadir images with accurate geolocation, low texture content and relatively flat terrain, fields for example)
  2. Internal Parameters Optimization: All Prior (Forces the optimal internal parameters to be close to the initial values.)
  3. Increase the image scale to full during step 2. Point, Cloud and Mesh.

I would also recommend you to go through our support article on Distortions and Artifacts in the Orthomosaic.