# Raspberry pi camera settings?

**URL:** <https://discourse.processing.org/t/raspberry-pi-camera-settings/15072>\
**Category:** Processing for Pi\
**Created:** [October 31, 2019, 10:17am UTC](https://discourse.processing.org/t/raspberry-pi-camera-settings/15072 "2019-10-31T10:17:54Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Highflower](https://avatars.discourse-cdn.com/v4/letter/h/87869e/32.png) [@Highflower](https://discourse.processing.org/u/Highflower)\
**Post date:** [October 31, 2019, 10:17am UTC](https://discourse.processing.org/t/raspberry-pi-camera-settings/15072/1 "2019-10-31T10:17:54Z")

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Hello,  
I’m working on a project where I’m using a raspberry pi camera with processing to measure light passing through a material to measure its thickness and evenness. I’m using the GLlibrary and trying to follow the examples on [https://pi.processing.org/tutorial/camera/](https://pi.processing.org/tutorial/camera/). It seems to work quite well but there is an automatic exposure setting I need to turn off in order to correlate the measured light to an actual thickness. I have tried to search and find info on this but I am new to both raspberry pi and processing (quite experienced in the arduino field however) so I haven’t been so successful…  
Should I do this from processing or maybe do the setting somewhere else in the pi?  
Thanks in advance and sorry for the noob question…

Best regards  
Olle

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**Author:** ![kll](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/kll/32/964_2.png) [@kll](https://discourse.processing.org/u/kll)\
**Post date:** [October 31, 2019, 11:12am UTC](https://discourse.processing.org/t/raspberry-pi-camera-settings/15072/2 "2019-10-31T11:12:13Z")

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did you play with the V4L2 tool?

```auto
sudo apt install qv4l2

```

 ![RPI_cam_V4L2](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/2X/1/11d1a6070454f0a974fb5524882c5e2e21bc5ab4.jpeg)

-1- you can set camera options , close program ( remembers until reboot )  
-2- start processing camera

* * *

or even can adjust settings while processing cam is running  
– i just now not know how to permanently save that settings  
[https://picamera.readthedocs.io/en/release-1.10/api.html](https://picamera.readthedocs.io/en/release-1.10/api.html)  
a python tool at boot?  
UPS little bit old  
[https://www.raspberrypi.org/forums/viewtopic.php?t=210495#p1299753](https://www.raspberrypi.org/forums/viewtopic.php?t=210495#p1299753)

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<div class="post-metadata">

**Author:** ![Highflower](https://avatars.discourse-cdn.com/v4/letter/h/87869e/32.png) [@Highflower](https://discourse.processing.org/u/Highflower)\
**Post date:** [October 31, 2019, 12:58pm UTC](https://discourse.processing.org/t/raspberry-pi-camera-settings/15072/3 "2019-10-31T12:58:29Z")

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Thank you very much! Highly appreciate it!  
It seems to work fine!! 👌  
For now I can live with doing the settings every time I start the system…