8 votes

Pix4D vs. Agisoft Photoscan

You would have more control over what you are doing in Agisoft Photoscan, meaning that you would be able integrate various python scripts to increase efficiency and automation of processing in Agisoft ...
Selim Erguden's user avatar
3 votes
Accepted

Smooth mosaicking of smaller orthomosaics to form a homogenous mosaic

That is noise / offset pixels or unexpected dark or light strips fringing an object. Data from airborne multispectral or hyperspectral imaging scanners shows a pronounced striping pattern due to ...
Maxima's user avatar
  • 1,701
2 votes

Measuring volume using DSM instead of point clouds in Pix4D

here's some good news for you! In the latest version of Pix4Dmapper, the volume is calculated based on the DSM if the 3rd step - DSM and Orthomosaic generation is done. This is done by default, and ...
Lisa Chen's user avatar
1 vote
Accepted

Leaflet image overlay align with pixel coordinates on map

Solution below is more a proof of concept than a bulletproof solution and is based upon the following suppositions: image has the same CRS as map; image is not rotated; image/map is shown at high ...
TomazicM's user avatar
  • 25.7k
1 vote

QGIS: multiple mosaics bands to 1 Visual RGB

Try to build a Virtual Raster. Make sure to check Place each input file into a separate band
BERA's user avatar
  • 72.6k
1 vote

Pix4D and ODM generated tiff with same source images not aligning?

I would recommend you set up enough GCP's in both software packages. I know that Pix4D allows for that in a pretty straight forward way -for instance following this tutorial. For OpenDroneMap the ...
Roberto Zeeland's user avatar
1 vote

Why reflectance map in pix4d dont are normalized

Try using Camera only calibration option in Pix4D. Alternatively you may try to identify those inaccurate reflectance areas using QGIS or Arcmap once you have the reflectance maps. It may be an ...
Selim Erguden's user avatar
1 vote

Why reflectance map in pix4d dont are normalized

As you mentioned the reflectance values for the Blue, Green, Red, RedEdge and NIR should be between 0 and 1 and NDVI should be between -1 and 1. If you are having a reflectance value above 1, I would ...
Selim Erguden's user avatar
1 vote
Accepted

Obtain reflectance map in pix4d?

Your calibration images may be under or over exposed. Sequoia takes three sets of images every time, you may try switching the calibration images. Moreover rather than using the default calibration ...
Selim Erguden's user avatar
1 vote

Pix4D Initial process merge looks exploded on one end

You could also try to turn on “Use Geometrically Verified Matching”. You will need to turn on/click “Advanced” tab and then look for Use Geometrically Verified Matching under the Matching tab.
Aaron Woods's user avatar
1 vote

Pix4D Initial process merge looks exploded on one end

After merging your seperate projects make sure you use the GCP's to increase the overall accuracy then Re-optimize them. And if that doesn't work I would re-run step 1 after implementing the GCP's.
Selim Erguden's user avatar
1 vote

Is there a way to view Pix4D outputs in an intractable web viewer?

Pix4D supports output of 3D textured mesh in the .ply format. Try outputting that format, then opening it in Sketchfab once you make a free account (not advertising, just noting that you need an ...
JasonInVegas's user avatar
  • 1,835

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