# gammar correction

**URL:** <https://psychtoolbox.discourse.group/t/gammar-correction/1354>\
**Category:** Uncategorized\
**Created:** [June 23, 2005, 1:37am UTC](https://psychtoolbox.discourse.group/t/gammar-correction/1354 "2005-06-23T01:37:41Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Allen\_Ingling](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@Allen\_Ingling](https://psychtoolbox.discourse.group/u/Allen_Ingling)\
**Post date:** [June 23, 2005, 1:37am UTC](https://psychtoolbox.discourse.group/t/gammar-correction/1354/1 "2005-06-23T01:37:41Z")

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dear psychtoolbox users,  
  
 I use VisualGammaDemo.m to do gammar correction. After doing that,  
I got the threshhold and the gammar value. Now, would the psychtoolbox  
do gammar correction automatically or I shall manually calculate it  
with the two numbers after that?  
  
thanks.  
btw: matlab6.5@windows