# Uncalibrated cameras

**URL:** <https://community.pix4d.com/t/uncalibrated-cameras/7576>\
**Category:** PIX4Dmapper Questions/Troubleshooting\
**Created:** [November 22, 2018, 2:42pm UTC](https://community.pix4d.com/t/uncalibrated-cameras/7576 "2018-11-22T14:42:12Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Jonathan\_Martinez\_Di](https://avatars.discourse-cdn.com/v4/letter/j/da6949/32.png) [@Jonathan\_Martinez\_Di](https://community.pix4d.com/u/Jonathan_Martinez_Di)\
**Post date:** [November 22, 2018, 2:42pm UTC](https://community.pix4d.com/t/uncalibrated-cameras/7576/1 "2018-11-22T14:42:12Z")

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Hello everybody!

I have some problems with the calibraation of some uncalibrated cameras in this stockpile.

The flight is 110 m (360 ft) and the images of the uncalibrated cameras&nbsp; correspond to gravel. The image quality is good (293 images). I have tryed selecting different options in the proccesing options panel (I’ve tried using “All Prior” in the camera optimization and Remach), but I haven’t obtain to calibrate the cameras succesfully.

Which options in the Step 1 would you recommend?

&nbsp;

Thank you very much for your time

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**Author:** ![Pix4D\_Alumni\_MV](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/pix4d_alumni_mv/32/2071_2.png) [@Pix4D\_Alumni\_MV](https://community.pix4d.com/u/Pix4D_Alumni_MV)\
**Post date:** [November 28, 2018, 9:45am UTC](https://community.pix4d.com/t/uncalibrated-cameras/7576/2 "2018-11-28T09:45:09Z")

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Hi Michel,

I recommend you this article to understand better the cause of this:&nbsp;[Quality Report Help  
 ](https://support.pix4d.com/hc/en-us/articles/202558689-Quality-Report-Help#label101)  
In order to get more calibrated camera, I can recommend you the following:  
[Menu Process \> Processing Options… \> 1. Initial Processing \> General](https://support.pix4d.com/hc/en-us/articles/202557759-Menu-Process-Processing-Options-1-Initial-Processing-General)

- Reduce the Image Scale (1/2 or 1/4). It often improve calibration.
- Enable the option “Use Geometrically Verified Matching”.&nbsp;It is adapted&nbsp;for flat homogeneous terrains such as fields where it is difficult to find matches.
- If&nbsp;you can, flying at a higher altitude with a 90%&nbsp;[overlap](https://support.pix4d.com/hc/en-us/articles/203756125)&nbsp;would make calibration easier.

A last and painful solution would be to manually calibrate the uncalibrated camera.

- [How to manually calibrate uncalibrated Cameras in the rayCloud](https://support.pix4d.com/hc/en-us/articles/202560189-How-to-manually-calibrate-uncalibrated-Cameras-in-the-rayCloud)

Hope this will help you,

Best,

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**Author:** ![Jonathan\_Martinez\_Di](https://avatars.discourse-cdn.com/v4/letter/j/da6949/32.png) [@Jonathan\_Martinez\_Di](https://community.pix4d.com/u/Jonathan_Martinez_Di)\
**Post date:** [November 29, 2018, 2:15pm UTC](https://community.pix4d.com/t/uncalibrated-cameras/7576/3 "2018-11-29T14:15:26Z")

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Hi Marco,

I will try you said

&nbsp;

Thank you so much

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**Author:** ![miguelcanales](https://avatars.discourse-cdn.com/v4/letter/m/4491bb/32.png) [@miguelcanales](https://community.pix4d.com/u/miguelcanales)\
**Post date:** [October 10, 2019, 11:56pm UTC](https://community.pix4d.com/t/uncalibrated-cameras/7576/4 "2019-10-10T23:56:20Z")

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thanks for your suggestion 🦜