Noise in images

PIX4Dcapture
1

Hi 

I am using Pix4d from past 8 months. Everything was fine last 6 months but from 2 months I am getting noise in images taken. We replaced the strip in drone put a new one and checked, still the noise is repeating. What might be the reason for the noise? Pls help.

2

Hi,

To be able to help you the best way as possible about the issue you are encountering, can you precise us:

  • If the image acquisition is done using Pix4Dcapture?
  • What is your configuration (drone, camera, mobile device)?
  • What do you mean by noise in the image taken? Is it out of focus? Can you provide us one of the images with noise?

In case of unexpected behavior, while using Pix4Dcapture, we recommend following the basic checks and troubleshooting steps. If properly followed, it will solve most of the issues that can be encountered.

Best regards,

3

Hi

 

Yes - I am using Pix4dCapture only. I am using DJI Phantom 4 Pro 2.0 with a Samsung Galaxy A6. 

Please find the image in the attached

4

Hi,

Sorry I did not put the link for the basic checks and troubleshooting steps in my previous message. I would recommend you to follow them to see if it solves the issue you have.

Also, as a focus issue appeared in the past with this drone but fixed with the latest releases, make sure to be updated with:

  • The latest drone firmware.
  • The latest Ctrl+DJI and Pix4Dcapture version.

Is the issue you have random? Is it reproducible? Is it occurring all the time?

Best,

5

Hi,

Thank You for the response, But I already referred to the link and followed the steps. Still, the issue is repeating,  

It is kind of Random, happens once in three days. (the main reason I am unable to get the root cause) . 

6

Hi,

Ok, thank you for the additional details and the troubleshooting you have done.
Note that this behavior may also be linked to the P4P V2 camera itself.

My suggestions here would be:

  • Make sure that everything works fine from a DJI GO 4 point of view.
  • To restart the mission from scratch when the focusing issue occurs as it will probably solve it. Restart your mission from scratch. To do so, close and force quit the app, disconnect the cable from the mobile device, turn off the remote controller and the drone. Then switch on the drone and the controller, reconnect the USB cable and open Pix4Dcapture. On Android, launch Pix4Dcapture from Ctrl+plugin.
  • Next time the issue occurs, note the time, the date and the project name. Then you can send us the logs so that we can investigate them and find the root cause.

Best,

8

NIR noise_altumPT
NIR noise_altumPT906×641 78.5 KB

Hi ,
Just wondering how to eliminate the bubble or noise in the image after processing step2/3.
All the raw image data were collected by drone with Altum-PT

9

Hi @yumyum,

Can you provide more information about the image you shared? Is it an orthomosaic? Is it a screenshot of the point cloud? If it is a screenshot, what layers are active?

Cheers,
Daniele

10

It is one of the multispectual reflectance tif file generated after processing 2 and 3.
The image is about a rice field and I was trying to improve it by adjusting the options of Point cloud Densification : like Image Scale: 1 Point Density: Optimal Minimum Number of Matches:6
I can see the new resault still has some the the bubble or noise in the same area in the image but it’s better.
Is there any other way to fix it ?

Thanks,

11

Hi,

this is strange. How does the quality report look like?

Please open a support ticket at RequestForm

12

Hi Jose,
I thought this result was normal because we usually need to deal with 7000-10,000 images for a corp field, and these noises happened all the time.

I will attach the screenshot of my process options to you or your team for reference tomorrow.

That’s really bothering me because we need to do some static analysis after mapping

Cheers

Best Regards.
Anderson