Hello.
I noticed that if some object are taller from ground level they are not represented how it should be.
The picture with electric pole is 80m from ground level with terrain follow.
I work with DJI Mavic 3M with RTK with good signal. I got more than 40 satellites most of the time.
Please help me.
Best regards, Kalin.
Hi Kalin,
I’m assuming you are using Pix4Dfields, correct? The Fast processing pipeline in Pix4Dfields is optimized for flat terrain, or terrain with gradual slopes, the common case for agriculture. It may indeed be the case that taller objects, like trees, buildings or, as in your case, electric poles, are not represented well in the DSM, resulting in visual artifacts around it in the ortho. You may want to try the Accurate processing pipeline in Pix4DFields. It is generally better able to handle such cases.
Hope this helps,
Vincent
Hello,
Thank you for your response. With accurate processing the is artefacts too, so it doesnt help. Its ok for me if i draw the right place of the obstacle, but when my clint see this, he doesnt believe me that i work with precision. Is there a plan to fix this glitches in the software Pix4D fields?
Regards, Kalin
Hi Kalin,
Would you mind posting a screenshot of the result obtained with the Accurate processing?
For the Fast processing pipeline it was a design decision to focus on flat terrain, so it could become really fast. Visual artifacts around high objects are therefore expected.
May I ask what your clients expects in terms of precision? Is that evaluated purely visually?
Kind regards,
Vincent
Hello,
This is with accurate processing. My clients just want to look like real, i mean like you take picture and the structure of the object looks right, not like that from the picture.
Regards,Kalin
На чт, 27.03.2025 г. в 10:14 Vincent Dercksen via Pix4D Community <notifications@pix4d.discoursemail.com> написа:
I’m assuming that the algorithms have difficulty representing the 3D geometry of the tower and power lines well. This is a well-known issue with thin structures.
To see if that is the case, would it be possible to post a screenshot of the DSM of the same area as the ortho (after Accurate processing)?
What you could try is to use Full blending in the processing settings. Depending on how well the DSM captures the 3D geometry, this could mitigate the issue.
Best,
Vincent
Hello,
What is DSM ?
На чт, 27.03.2025 г. в 15:30 Vincent Dercksen via Pix4D Community <notifications@pix4d.discoursemail.com> написа:
Hi Kalin,
a Digital Surface Model DSM is a representation of the terrain that captures the elevation of the earth’s surface, including all objects on it, such as buildings and vegetation.
In Pix4Dfields it is generated together with the ortho. It appears as “Surface Model” in the list of layers.
I guess this is what you want.
На пн, 31.03.2025 г. в 9:46 Vincent Dercksen via Pix4D Community <notifications@pix4d.discoursemail.com> написа:
Hi Kalin,
photogrammery usually strugggles with the top parts of thiner structures like power poles. But your case seems to be extrem, because you would expect to atleast see a clean pole base, which is everything you need for correct obstacle detection.
Some tips that might help you:
Then you should be able to get clean reconstructions such as:
