# How to get calibrated images

**URL:** <https://forum.commonvisionblox.com/t/how-to-get-calibrated-images/1452>\
**Category:** .Net API\
**Tags:** csharp, acquisition\
**Created:** [July 7, 2021, 1:20pm UTC](https://forum.commonvisionblox.com/t/how-to-get-calibrated-images/1452 "2021-07-07T13:20:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Road](https://avatars.discourse-cdn.com/v4/letter/r/43a26b/32.png) [@Road](https://forum.commonvisionblox.com/u/Road)\
**Post date:** [July 7, 2021, 1:20pm UTC](https://forum.commonvisionblox.com/t/how-to-get-calibrated-images/1452/1 "2021-07-07T13:20:42Z")

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Hello everyone,

I have the code from [https://forum.commonvisionblox.com/t/getting-started-with-cvb-net/246/6](https://forum.commonvisionblox.com/t/getting-started-with-cvb-net/246/6) on how to acquire images from camera.  
The fish eye effect affects the accuracy of results. So i would like to calibrate it before acquiring. I found there is a cvb tool _auto calibration_ like this:

 ![Unbenannt4](https://canada1.discourse-cdn.com/flex027/uploads/commonvisionblox/original/1X/46b3a092369c75119cd470b0245826173812f7d0.jpeg)  
How can i apply the transformation coefficients to achieve calibration before StreamImage starts?  
Or is there any other methods?

I really need this help. Thank you anyway!

Best Wishes  
Road

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**Author:** ![Diverl](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.commonvisionblox.com/diverl/32/434_2.png) [@Diverl](https://forum.commonvisionblox.com/u/Diverl)\
**Post date:** [July 8, 2021, 7:23am UTC](https://forum.commonvisionblox.com/t/how-to-get-calibrated-images/1452/2 "2021-07-08T07:23:30Z")

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Good morning @Road,

I guess, what you are looking for is the transformation function as shown in Tutorial\Foundation\VC\VCNLCalibration (which you can find in the CVB installation). The transformation functions are part of the foundation package. I hope, the example will help you. Further information on the different APIs can be found in the [Online Reference](https://help.commonvisionblox.com/NextGen/14.0/md_scripts_main __a_p_i__ overview.html).

Have a nice day!  
Bea