MS_Comp_Review.pdf (2.1 MB)
Over the course of 3 days I created an orthomosaic of my study area using a P4 MS drone. I did not think that the weather conditions varied that much between the days but after processing the multispectral ortho I am seeing a lot of variation between the ortho of images from day 1 and day 2, day 1 and day 3, etc…
Is there anything that can be done to adjust these images, either in post or pre processing, so that the final ortho looks cleaner (for lack of better words)? Or would the best course of action be to re-fly the study area?
Fly all the images with the same weather and light condition could certainly help solve the issue.
However, there are 3 suggestions (A, B, and C) you can try without re-taking the images:
A: Third party application
A user suggested using a third-party application in order to modify the images and balance them in order to make them look more similar:
However, you should pay attention not to remove the EXIF information from the images. In general, we do not suggest modifying the original images and use modified images as input for PIX4Dmapper.
B: Radiometric Corrections in Processing Options of step 3
In the processing options in Step 3. DSM, Orthomosaic and Index in the Index Calculator tab Please select Radiometric corrections > Correction type > (here change the correction type)
Please verify in our Pix4D Documentation about Radiometric corrections in order to find out the best correction for your data. For more information: Camera radiometric correction specifications.
C: Disable Color Balancing
Also, if the previous suggestion did not work, you could try to disable the color balancing in the mosaic generation. According to our experience, this can help in some cases.
Unfortunately, at this moment, we are not able to make this change via the user interface. What you can do is to:
Process the three steps.
Open .p4d file. (located in …\project_name.p4d). Please use a text editor to open the .p4d file
I have gone through and tried each of these suggestions to no avail. I appreciate this response and will surely use these methods to troubleshoot my issues next time around! Thank you so much Daniele, I greatly appreciate your help!
Thank you for trying the suggestions provided. Unfortunately, it seems that the differences between the different projects were too important.
Acquiring images with the same weather and light condition could certainly help solve the issue in the future.
We - and our partners - use cookies to deliver our services. By using our website, you agree to the use of cookies as described in our
Cookie Policy
These cookies are necessary for the website to function and cannot be switched off in our systems.
They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences,
logging in, or filling in forms. These cookies do not store any personally identifiable information.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site.
They help us to know which pages are the most and least popular and see how visitors move around the site.
All information these cookies collect is aggregated and therefore anonymous.
If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
These cookies may be set through our site by our advertising partner (Google).
They may be used by Google to build a profile of your interests and show you relevant adverts on other sites.
They do not directly store personal information but are based on uniquely identifying your browser and internet device.
If you do not allow these cookies, you will experience less targeted advertising.