# Can I change the brightness of validation and testing set?

**URL:** <https://discuss.roboflow.com/t/can-i-change-the-brightness-of-validation-and-testing-set/2239>\
**Category:** 🤝  Community Help\
**Created:** [May 21, 2023, 7:11am UTC](https://discuss.roboflow.com/t/can-i-change-the-brightness-of-validation-and-testing-set/2239 "2023-05-21T07:11:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Lik\_Seng\_Fong](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/lik_seng_fong/32/1365_2.png) [@Lik\_Seng\_Fong](https://discuss.roboflow.com/u/Lik_Seng_Fong)\
**Post date:** [May 21, 2023, 7:11am UTC](https://discuss.roboflow.com/t/can-i-change-the-brightness-of-validation-and-testing-set/2239/1 "2023-05-21T07:11:11Z")

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Currently, I am working on the label printing defect detection project. My project is mainly focus on finding the location of defect on the label printing. Can I know whether there is any method/ way to change the brightness of the validation and testing dataset? Because I want to identify (through validation and testing) whether the YOLO model that I trained can show good result on different brightness or not.

For example, I want to change the brightness of validation and testing dataset to ± 10%. Is this possible? Thank You to who which is willing to help me.

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**Author:** ![trevorhlynn](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/trevorhlynn/32/1690_2.png) [@trevorhlynn](https://discuss.roboflow.com/u/trevorhlynn)\
**Post date:** [May 23, 2023, 1:19pm UTC](https://discuss.roboflow.com/t/can-i-change-the-brightness-of-validation-and-testing-set/2239/2 "2023-05-23T13:19:35Z")

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Hello! You can see more information about augmentations here: [Generate Image Augmentations with Roboflow](https://blog.roboflow.com/image-augmentation/)

One way to alter the brightness of your dataset would be to apply only the brightness augmentation and generate a dataset. Then export that data and upload to validation and test datasets.

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**Author:** ![Lik\_Seng\_Fong](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/lik_seng_fong/32/1365_2.png) [@Lik\_Seng\_Fong](https://discuss.roboflow.com/u/Lik_Seng_Fong)\
**Post date:** [May 23, 2023, 2:32pm UTC](https://discuss.roboflow.com/t/can-i-change-the-brightness-of-validation-and-testing-set/2239/3 "2023-05-23T14:32:15Z")

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Okay! Right now I get some idea on how to do it. Thank You So Much.

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**Author:** ![Lik\_Seng\_Fong](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/lik_seng_fong/32/1365_2.png) [@Lik\_Seng\_Fong](https://discuss.roboflow.com/u/Lik_Seng_Fong)\
**Post date:** [May 24, 2023, 4:28pm UTC](https://discuss.roboflow.com/t/can-i-change-the-brightness-of-validation-and-testing-set/2239/4 "2023-05-24T16:28:53Z")

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Actually, now I am curious, during brightness augmentation (25%) and x2 dataset, can I ensure original of ‘Image 1’, after augmentation the ‘image 1’ will become +25% brightness and -25% brightness?

Because during I review the dataset after brightness augmentation, some of the image will not change it brightness.